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* Merge branch 'tracing-core-for-linus' of ↵Linus Torvalds2010-05-181-2/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: tracing: Fix "integer as NULL pointer" warning. tracing: Fix tracepoint.h DECLARE_TRACE() to allow more than one header tracing: Make the documentation clear on trace_event boot option ring-buffer: Wrap open-coded WARN_ONCE tracing: Convert nop macros to static inlines tracing: Fix sleep time function profiling tracing: Show sample std dev in function profiling tracing: Add documentation for trace commands mod, traceon/traceoff ring-buffer: Make benchmark handle missed events ring-buffer: Make non-consuming read less expensive with lots of cpus. tracing: Add graph output support for irqsoff tracer tracing: Have graph flags passed in to ouput functions tracing: Add ftrace events for graph tracer tracing: Dump either the oops's cpu source or all cpus buffers tracing: Fix uninitialized variable of tracing/trace output
| * tracing: Fix tracepoint.h DECLARE_TRACE() to allow more than one headerSteven Rostedt2010-05-051-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When more than one header is included under CREATE_TRACE_POINTS the DECLARE_TRACE() macro is not defined back to its original meaning and the second include will fail to initialize the TRACE_EVENT() and DECLARE_TRACE() correctly. To fix this the tracepoint.h file moves the define of DECLARE_TRACE() out of the #ifdef _LINUX_TRACEPOINT_H protection (just like the define of the TRACE_EVENT()). This way the define_trace.h will undef the DECLARE_TRACE() at the end and allow new headers to start from scratch. This patch also requires fixing the include/events/napi.h It currently uses DECLARE_TRACE() and should be converted to a TRACE_EVENT() format. But I'll leave that change to the authors of that file. But since the napi.h file depends on using the CREATE_TRACE_POINTS and does not define its own DEFINE_TRACE() it must use the define_trace.h method instead. Cc: Neil Horman <nhorman@tuxdriver.com> Cc: David S. Miller <davem@davemloft.net> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * Merge commit 'v2.6.34-rc5' into tracing/coreIngo Molnar2010-04-211-0/+164
| |\ | | | | | | | | | | | | | | | Merge reason: pick up latest -rc's. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | \ Merge branch 'sched-core-for-linus' of ↵Linus Torvalds2010-05-181-22/+10
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (49 commits) stop_machine: Move local variable closer to the usage site in cpu_stop_cpu_callback() sched, wait: Use wrapper functions sched: Remove a stale comment ondemand: Make the iowait-is-busy time a sysfs tunable ondemand: Solve a big performance issue by counting IOWAIT time as busy sched: Intoduce get_cpu_iowait_time_us() sched: Eliminate the ts->idle_lastupdate field sched: Fold updating of the last_update_time_info into update_ts_time_stats() sched: Update the idle statistics in get_cpu_idle_time_us() sched: Introduce a function to update the idle statistics sched: Add a comment to get_cpu_idle_time_us() cpu_stop: add dummy implementation for UP sched: Remove rq argument to the tracepoints rcu: need barrier() in UP synchronize_sched_expedited() sched: correctly place paranioa memory barriers in synchronize_sched_expedited() sched: kill paranoia check in synchronize_sched_expedited() sched: replace migration_thread with cpu_stop stop_machine: reimplement using cpu_stop cpu_stop: implement stop_cpu[s]() sched: Fix select_idle_sibling() logic in select_task_rq_fair() ...
| * | | sched: Remove rq argument to the tracepointsPeter Zijlstra2010-05-071-22/+10
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | struct rq isn't visible outside of sched.o so its near useless to expose the pointer, also there are no users of it, so remove it. Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1272997616.1642.207.camel@laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'perf-core-for-linus' of ↵Linus Torvalds2010-05-181-38/+17
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (311 commits) perf tools: Add mode to build without newt support perf symbols: symbol inconsistency message should be done only at verbose=1 perf tui: Add explicit -lslang option perf options: Type check all the remaining OPT_ variants perf options: Type check OPT_BOOLEAN and fix the offenders perf options: Check v type in OPT_U?INTEGER perf options: Introduce OPT_UINTEGER perf tui: Add workaround for slang < 2.1.4 perf record: Fix bug mismatch with -c option definition perf options: Introduce OPT_U64 perf tui: Add help window to show key associations perf tui: Make <- exit menus too perf newt: Add single key shortcuts for zoom into DSO and threads perf newt: Exit browser unconditionally when CTRL+C, q or Q is pressed perf newt: Fix the 'A'/'a' shortcut for annotate perf newt: Make <- exit the ui_browser x86, perf: P4 PMU - fix counters management logic perf newt: Make <- zoom out filters perf report: Report number of events, not samples perf hist: Clarify events_stats fields usage ... Fix up trivial conflicts in kernel/fork.c and tools/perf/builtin-record.c
| * | | tracing: Factorize lock events in a lock classFrederic Weisbecker2010-05-091-33/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lock_acquired, lock_contended and lock_release now share the same prototype and format. Let's factorize them into a lock event class. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Steven Rostedt <rostedt@goodmis.org>
| * | | tracing: Drop the nested field from lock_release eventFrederic Weisbecker2010-05-091-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Drop the nested field as we don't use it. Every nested state can be computed from a state machine on post processing already. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Steven Rostedt <rostedt@goodmis.org>
| * | | tracing: Drop lock_acquired waittime fieldFrederic Weisbecker2010-05-091-7/+4
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Drop the waittime field from the lock_acquired event, we can calculate it by substracting the lock_acquired event timestamp with the matching lock_acquire one. It is not needed and takes useless space in the traces. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Steven Rostedt <rostedt@goodmis.org>
* | | Merge commit 'tip/tracing/core' into oprofile/coreRobert Richter2010-04-232-37/+33
|\ \ \ | |/ / |/| / | |/ | | | | | | Conflicts: drivers/oprofile/cpu_buffer.c Signed-off-by: Robert Richter <robert.richter@amd.com>
| * Merge branch 'linus' into tracing/coreIngo Molnar2010-04-081-1/+1
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: include/linux/module.h kernel/module.c Semantic conflict: include/trace/events/module.h Merge reason: Resolve the conflict with upstream commit 5fbfb18 ("Fix up possibly racy module refcounting") Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Fix compile error in module tracepoints when MODULE_UNLOAD not setSteven Rostedt2010-03-311-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If modules are configured in the build but unloading of modules is not, then the refcnt is not defined. Place the get/put module tracepoints under CONFIG_MODULE_UNLOAD since it references this field in the module structure. As a side-effect, this patch also reduces the code when MODULE_UNLOAD is not set, because these unused tracepoints are not created. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * | tracing: Remove side effect from module tracepoints that caused a GPFLi Zefan2010-03-311-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the @refcnt argument, because it has side-effects, and arguments with side-effects are not skipped by the jump over disabled instrumentation and are executed even when the tracepoint is disabled. This was also causing a GPF as found by Randy Dunlap: Subject: 2.6.33 GP fault only when built with tracing LKML-Reference: <4BA2B69D.3000309@oracle.com> Note, the current 2.6.34-rc has a fix for the actual cause of the GPF, but this fixes one of its triggers. Tested-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4BA97FA7.6040406@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * | tracing: Convert some signal events to DEFINE_TRACELi Zefan2010-03-311-30/+22
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use DECLARE_EVENT_CLASS to remove duplicate code: text data bss dec hex filename 23639 6084 8 29731 7423 kernel/signal.o.orig 22727 6084 8 28819 7093 kernel/signal.o 2 events are converted: signal_queue_overflow: signal_overflow_fail, signal_lose_info No functional change. Acked-by: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4BA97FBD.8070703@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* | Add DocBook documentation for the block tracepoints.William Cohen2010-03-091-0/+164
|/ | | | | | | | | This patch adds a simple description of the various block tracepoints available in the kernel. Signed-off-by: William Cohen <wcohen@redhat.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Merge branch 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2010-03-051-0/+41
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (145 commits) KVM: x86: Add KVM_CAP_X86_ROBUST_SINGLESTEP KVM: VMX: Update instruction length on intercepted BP KVM: Fix emulate_sys[call, enter, exit]()'s fault handling KVM: Fix segment descriptor loading KVM: Fix load_guest_segment_descriptor() to inject page fault KVM: x86 emulator: Forbid modifying CS segment register by mov instruction KVM: Convert kvm->requests_lock to raw_spinlock_t KVM: Convert i8254/i8259 locks to raw_spinlocks KVM: x86 emulator: disallow opcode 82 in 64-bit mode KVM: x86 emulator: code style cleanup KVM: Plan obsolescence of kernel allocated slots, paravirt mmu KVM: x86 emulator: Add LOCK prefix validity checking KVM: x86 emulator: Check CPL level during privilege instruction emulation KVM: x86 emulator: Fix popf emulation KVM: x86 emulator: Check IOPL level during io instruction emulation KVM: x86 emulator: fix memory access during x86 emulation KVM: x86 emulator: Add Virtual-8086 mode of emulation KVM: x86 emulator: Add group9 instruction decoding KVM: x86 emulator: Add group8 instruction decoding KVM: do not store wqh in irqfd ... Trivial conflicts in Documentation/feature-removal-schedule.txt
| * KVM: MMU: Add tracepoint for guest page agingAvi Kivity2010-03-011-0/+22
| | | | | | | | Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: trace guest fpu loads and unloadsAvi Kivity2010-03-011-0/+19
| | | | | | | | | | Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* | Merge branch 'for_linus' of ↵Linus Torvalds2010-03-052-0/+129
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (36 commits) ext4: fix up rb_root initializations to use RB_ROOT ext4: Code cleanup for EXT4_IOC_MOVE_EXT ioctl ext4: Fix the NULL reference in double_down_write_data_sem() ext4: Fix insertion point of extent in mext_insert_across_blocks() ext4: consolidate in_range() definitions ext4: cleanup to use ext4_grp_offs_to_block() ext4: cleanup to use ext4_group_first_block_no() ext4: Release page references acquired in ext4_da_block_invalidatepages ext4: Fix ext4_quota_write cross block boundary behaviour ext4: Convert BUG_ON checks to use ext4_error() instead ext4: Use direct_IO_no_locking in ext4 dio read ext4: use ext4_get_block_write in buffer write ext4: mechanical rename some of the direct I/O get_block's identifiers ext4: make "offset" consistent in ext4_check_dir_entry() ext4: Handle non empty on-disk orphan link ext4: explicitly remove inode from orphan list after failed direct io ext4: fix error handling in migrate ext4: deprecate obsoleted mount options ext4: Fix fencepost error in chosing choosing group vs file preallocation. jbd2: clean up an assertion in jbd2_journal_commit_transaction() ...
| * ext4: Add new tracepoints to debug delayed allocation space functionsTheodore Ts'o2010-01-011-0/+101
| | | | | | | | | | | | | | Add tracepoints for ext4_da_reserve_space(), ext4_da_update_reserve_space(), and ext4_da_release_space(). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: Add new tracepoint for jbd2_cleanup_journal_tailTheodore Ts'o2009-12-231-0/+28
| | | | | | | | Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* | perf lock: Enhance information of lock trace eventsHitoshi Mitake2010-01-311-9/+20
|/ | | | | | | | | | | | Add wait time and lock identification details. Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1264851813-8413-11-git-send-email-mitake@dcl.info.waseda.ac.jp> [ removed the file/line bits as we can do that better via IPs ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'timers-fixes-for-linus' of ↵Linus Torvalds2009-12-111-4/+4
|\ | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: itimer: Fix the itimer trace print format hrtimer: move timer stats helper functions to hrtimer.c hrtimer: Tune hrtimer_interrupt hang logic
| * itimer: Fix the itimer trace print formatThomas Gleixner2009-12-101-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Compiling powerpc64 results in: include/trace/events/timer.h:279: warning: format '%lu' expects type 'long unsigned int', but argument 4 has type 'cputime_t' .... cputime_t on power is u64, which triggers the above warning. Cast the cputime_t to unsigned long long and fix the print format string. That works on both 32 and 64 bit architectures. While at it change the print format for long variables from %lu to %ld. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
* | Merge branch 'for_linus' of ↵Linus Torvalds2009-12-101-14/+40
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (47 commits) ext4: Fix potential fiemap deadlock (mmap_sem vs. i_data_sem) ext4: Do not override ext2 or ext3 if built they are built as modules jbd2: Export jbd2_log_start_commit to fix ext4 build ext4: Fix insufficient checks in EXT4_IOC_MOVE_EXT ext4: Wait for proper transaction commit on fsync ext4: fix incorrect block reservation on quota transfer. ext4: quota macros cleanup ext4: ext4_get_reserved_space() must return bytes instead of blocks ext4: remove blocks from inode prealloc list on failure ext4: wait for log to commit when umounting ext4: Avoid data / filesystem corruption when write fails to copy data ext4: Use ext4 file system driver for ext2/ext3 file system mounts ext4: Return the PTR_ERR of the correct pointer in setup_new_group_blocks() jbd2: Add ENOMEM checking in and for jbd2_journal_write_metadata_buffer() ext4: remove unused parameter wbc from __ext4_journalled_writepage() ext4: remove encountered_congestion trace ext4: move_extent_per_page() cleanup ext4: initialize moved_len before calling ext4_move_extents() ext4: Fix double-free of blocks with EXT4_IOC_MOVE_EXT ext4: use ext4_data_block_valid() in ext4_free_blocks() ...
| * ext4: remove encountered_congestion traceWu Fengguang2009-11-241-4/+2
| | | | | | | | | | | | | | It is no longer set and scheduled to be removed. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: print i_mode in octal in ext4 tracepointsTheodore Ts'o2009-11-221-4/+4
| | | | | | | | | | | | | | Inode permissions are much easier to understand if they are printed in octal. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: call ext4_forget() from ext4_free_blocks()Theodore Ts'o2009-11-231-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the facility for ext4_forget() to be called from ext4_free_blocks(). This simplifies the code in a large number of places, and centralizes most of the work of calling ext4_forget() into a single place. Also fix a bug in the extents migration code; it wasn't calling ext4_forget() when releasing the indirect blocks during the conversion. As a result, if the system cashed during or shortly after the extents migration, and the released indirect blocks get reused as data blocks, the journal replay would corrupt the data blocks. With this new patch, fixing this bug was as simple as adding the EXT4_FREE_BLOCKS_FORGET flags to the call to ext4_free_blocks(). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
| * ext4: add tracepoint for ext4_forget()Theodore Ts'o2009-11-231-0/+26
| | | | | | | | Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* | Merge branch 'perf-core-for-linus' of ↵Linus Torvalds2009-12-0514-687/+535
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (470 commits) x86: Fix comments of register/stack access functions perf tools: Replace %m with %a in sscanf hw-breakpoints: Keep track of user disabled breakpoints tracing/syscalls: Make syscall events print callbacks static tracing: Add DEFINE_EVENT(), DEFINE_SINGLE_EVENT() support to docbook perf: Don't free perf_mmap_data until work has been done perf_event: Fix compile error perf tools: Fix _GNU_SOURCE macro related strndup() build error trace_syscalls: Remove unused syscall_name_to_nr() trace_syscalls: Simplify syscall profile trace_syscalls: Remove duplicate init_enter_##sname() trace_syscalls: Add syscall_nr field to struct syscall_metadata trace_syscalls: Remove enter_id exit_id trace_syscalls: Set event_enter_##sname->data to its metadata trace_syscalls: Remove unused event_syscall_enter and event_syscall_exit perf_event: Initialize data.period in perf_swevent_hrtimer() perf probe: Simplify event naming perf probe: Add --list option for listing current probe events perf probe: Add argv_split() from lib/argv_split.c perf probe: Move probe event utility functions to probe-event.c ...
| * \ Merge branch 'perf/mce' into perf/coreIngo Molnar2009-12-031-0/+69
| |\ \ | | | | | | | | | | | | | | | | | | | | Merge reason: It's ready for v2.6.33. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | perf_event, x86, mce: Use TRACE_EVENT() for MCE loggingHidetoshi Seto2009-10-131-0/+69
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This approach is the first baby step towards solving many of the structural problems the x86 MCE logging code is having today: - It has a private ring-buffer implementation that has a number of limitations and has been historically fragile and buggy. - It is using a quirky /dev/mcelog ioctl driven ABI that is MCE specific. /dev/mcelog is not part of any larger logging framework and hence has remained on the fringes for many years. - The MCE logging code is still very unclean partly due to its ABI limitations. Fields are being reused for multiple purposes, and the whole message structure is limited and x86 specific to begin with. All in one, the x86 tree would like to move away from this private implementation of an event logging facility to a broader framework. By using perf events we gain the following advantages: - Multiple user-space agents can access MCE events. We can have an mcelog daemon running but also a system-wide tracer capturing important events in flight-recorder mode. - Sampling support: the kernel and the user-space call-chain of MCE events can be stored and analyzed as well. This way actual patterns of bad behavior can be matched to precisely what kind of activity happened in the kernel (and/or in the app) around that moment in time. - Coupling with other hardware and software events: the PMU can track a number of other anomalies - monitoring software might chose to monitor those plus the MCE events as well - in one coherent stream of events. - Discovery of MCE sources - tracepoints are enumerated and tools can act upon the existence (or non-existence) of various channels of MCE information. - Filtering support: we just subscribe to and act upon the events we are interested in. Then even on a per event source basis there's in-kernel filter expressions available that can restrict the amount of data that hits the event channel. - Arbitrary deep per cpu buffering of events - we can buffer 32 entries or we can buffer as much as we want, as long as we have the RAM. - An NMI-safe ring-buffer implementation - mappable to user-space. - Built-in support for timestamping of events, PID markers, CPU markers, etc. - A rich ABI accessible over system call interface. Per cpu, per task and per workload monitoring of MCE events can be done this way. The ABI itself has a nice, meaningful structure. - Extensible ABI: new fields can be added without breaking tooling. New tracepoints can be added as the hardware side evolves. There's various parsers that can be used. - Lots of scheduling/buffering/batching modes of operandi for MCE events. poll() support. mmap() support. read() support. You name it. - Rich tooling support: even without any MCE specific extensions added the 'perf' tool today offers various views of MCE data: perf report, perf stat, perf trace can all be used to view logged MCE events and perhaps correlate them to certain user-space usage patterns. But it can be used directly as well, for user-space agents and policy action in mcelog, etc. With this we hope to achieve significant code cleanup and feature improvements in the MCE code, and we hope to be able to drop the /dev/mcelog facility in the end. This patch is just a plain dumb dump of mce_log() records to the tracepoints / perf events framework - a first proof of concept step. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Andi Kleen <ak@linux.intel.com> LKML-Reference: <4AD42A0D.7050104@jp.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracepoint: Add signal loss eventsMasami Hiramatsu2009-11-261-0/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add signal_overflow_fail and signal_lose_info tracepoints for signal-lost events. Changes in v3: - Add docbook style comments Changes in v2: - Use siginfo string macro Suggested-by: Roland McGrath <roland@redhat.com> Reviewed-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Oleg Nesterov <oleg@redhat.com> LKML-Reference: <20091124215658.30449.9934.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracepoint: Add signal deliver eventMasami Hiramatsu2009-11-261-0/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a tracepoint where a process gets a signal. This tracepoint shows signal-number, sa-handler and sa-flag. Changes in v3: - Add docbook style comments Changes in v2: - Add siginfo argument - Fix comment Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Reviewed-by: Jason Baron <jbaron@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Oleg Nesterov <oleg@redhat.com> LKML-Reference: <20091124215651.30449.20926.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracepoint: Move signal sending tracepoint to events/signal.hMasami Hiramatsu2009-11-262-25/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move signal sending event to events/signal.h. This patch also renames sched_signal_send event to signal_generate. Changes in v4: - Fix a typo of task_struct pointer. Changes in v3: - Add docbook style comments Changes in v2: - Add siginfo argument - Add siginfo storing macro Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Reviewed-by: Jason Baron <jbaron@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Oleg Nesterov <oleg@redhat.com> LKML-Reference: <20091124215645.30449.60208.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Restore original format of sched eventsLi Zefan2009-11-261-12/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The original format for sched_stat_iowait and sched_stat_sleep: $ cat events/sched/sched_stat_iowait/format ... print fmt: "comm=%s pid=%d delay=%Lu [ns]", ... $ cat events/sched/sched_stat_sleep/format ... print fmt: "comm=%s pid=%d delay=%Lu [ns]", ... But commit commit 75ec29ab848a7e92a41aaafaeb33d1afbc839be4 ("tracing: Convert some sched trace events to DEFINE_EVENT and _PRINT") broke the format: $ cat events/sched/sched_stat_iowait/format print fmt: "task: %s:%d iowait: %Lu [ns]", ... $ cat events/sched/sched_stat_sleep/format print fmt: "task: %s:%d sleep: %Lu [ns]", ... No change in functionality. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B0E2951.9050800@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Convert some ext4 events to DEFINE_TRACELi Zefan2009-11-261-94/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use DECLARE_EVENT_CLASS to remove duplicate code: text data bss dec hex filename 294695 6104 340 301139 49853 fs/ext4/ext4.o.old 289983 6104 324 296411 485db fs/ext4/ext4.o 5 events are convertd: ext4__write_begin: ext4_write_begin, ext4_da_write_begin ext4__write_end: ext4_{ordered, writeback, journalled}_write_end No change in functionality. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B0E2938.2040708@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Convert some jbd2 events to DEFINE_EVENTLi Zefan2009-11-261-52/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use DECLARE_EVENT_CLASS to remove duplicate code: text data bss dec hex filename 34903 1693 448 37044 90b4 fs/jbd2/journal.o.old 31931 1693 416 34040 84f8 fs/jbd2/journal.o Four events are converted: jbd2_commit: jbd2_start_commit, jbd2_commit_{locking, flushing, logging} No change in functionality. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B0E290F.7030909@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Convert some block events to DEFINE_EVENTLi Zefan2009-11-261-160/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | use DECLARE_EVENT_CLASS to remove duplicate code: text data bss dec hex filename 53570 3284 184 57038 dece block/blk-core.o.old 43702 3284 144 47130 b81a block/blk-core.o 12 events are converted: block_rq: block_rq_insert, block_rq_issue block_rq_with_error: block_rq_{abort, requeue, complete} block_bio: block_bio_{backmerge, frontmerge, queue} block_get_rq: block_getrq, block_sleeprq block_unplug: block_unplug_timer, block_unplug_io No change in functionality. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B0E28E6.7060609@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Convert some power events to DEFINE_EVENTLi Zefan2009-11-261-21/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use DECLARE_EVENT_CLASS to remove duplicate code: text data bss dec hex filename 4312 524 12 4848 12f0 kernel/trace/power-traces.o.old 3455 524 8 3987 f93 kernel/trace/power-traces.o Two events are converted: power: power_start, power_frequency No change in functionality. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arjan van de Ven <arjan@infradead.org> LKML-Reference: <4B0E28C2.1090906@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Convert some workqueue events to DEFINE_EVENTLi Zefan2009-11-261-15/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use DECLARE_EVENT_CLASS to remove duplicate code: text data bss dec hex filename 13171 800 72 14043 36db kernel/workqueue.o.old 12243 800 68 13111 3337 kernel/workqueue.o Two events are converted: workqueue: workqueue_insertion, workqueue_execution No change in functionality. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B0E289F.5010104@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Convert softirq events to DEFINE_EVENTLi Zefan2009-11-261-25/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use DECLARE_EVENT_CLASS to remove duplicate code: text data bss dec hex filename 12781 952 36 13769 35c9 kernel/softirq.o.old 11981 952 32 12965 32a5 kernel/softirq.o Two events are converted: softirq: softirq_entry, softirq_exit No change in functionality. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B0E287F.4030708@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Convert some kmem events to DEFINE_EVENTLi Zefan2009-11-261-90/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use DECLARE_EVENT_CLASS to remove duplicate code: text data bss dec hex filename 333987 69800 27228 431015 693a7 mm/built-in.o.old 330030 69800 27228 427058 68432 mm/built-in.o 8 events are converted: kmem_alloc: kmalloc, kmem_cache_alloc kmem_alloc_node: kmalloc_node, kmem_cache_alloc_node kmem_free: kfree, kmem_cache_free mm_page: mm_page_alloc_zone_locked, mm_page_pcpu_drain No change in functionality. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mel Gorman <mel@csn.ul.ie> LKML-Reference: <4B0E286A.2000405@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Convert module refcnt events to DEFINE_EVENTLi Zefan2009-11-261-15/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use DECLARE_EVENT_CLASS to remove duplicate code: text data bss dec hex filename 29854 1980 128 31962 7cda kernel/module.o.old 28750 1980 128 30858 788a kernel/module.o Two events are converted: module_refcnt: module_get, module_put No change in functionality. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B0E283B.3010508@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | events: Rename TRACE_EVENT_TEMPLATE() to DECLARE_EVENT_CLASS()Ingo Molnar2009-11-261-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is not quite obvious at first sight what TRACE_EVENT_TEMPLATE does: does it define an event as well beyond defining a template? To clarify this, rename it to DECLARE_EVENT_CLASS, which follows the various 'DECLARE_*()' idioms we already have in the kernel: DECLARE_EVENT_CLASS(class) DEFINE_EVENT(class, event1) DEFINE_EVENT(class, event2) DEFINE_EVENT(class, event3) To complete this logic we should also rename TRACE_EVENT() to: DEFINE_SINGLE_EVENT(single_event) ... but in a more quiet moment of the kernel cycle. Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4B0E286A.2000405@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | tracing: Convert some sched trace events to DEFINE_EVENT and _PRINTSteven Rostedt2009-11-241-118/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Converting some of the scheduler trace events to use the TRACE_EVENT_TEMPLATE, DEFINE_EVENT and DEFINE_EVENT_PRINT helped to save some space: $ size kernel/sched.o-* text data bss dec hex filename 79299 6776 2520 88595 15a13 kernel/sched.o-notrace 101941 11896 2584 116421 1c6c5 kernel/sched.o-templ 104779 11896 2584 119259 1d1db kernel/sched.o-trace sched.o-notrace is without any tracepoints compiled sched.o-templ is with this patch sched.o-trace is the tracepoints before this patch The trace events converted to DEFINE_EVENT: sched_wakeup, sched_wakeup_new, sched_process_free, sched_process_exit, and sched_stat_wait. The trace events converted to DEFINE_EVENT_PRINT: sched_stat_sleep and sched_stat_iowait. Note, since the TRACE_EVENT_TEMPLATE always uses a print, the sched_stat_wait print format is defined in the template and this template is used by sched_stat_sleep and sched_stat_iowait. But the later two override the print format. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * | tracing: Rename 'lockdep' event subsystem into 'lock'Frederic Weisbecker2009-11-131-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Lockdep events subsystem gathers various locking related events such as a request, release, contention or acquisition of a lock. The name of this event subsystem is a bit of a misnomer since these events are not quite related to lockdep but more generally to locking, ie: these events are not reporting lock dependencies or possible deadlock scenario but pure locking events. Hence this rename. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <1258103194-843-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | events: Harmonize event field names and print output namesIngo Molnar2009-10-155-77/+74
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we can filter based on fields via perf record, people will start using filter expressions and will expect them to be obvious. The primary way to see which fields are available is by looking at the trace output, such as: gcc-18676 [000] 343.011728: irq_handler_entry: irq=0 handler=timer cc1-18677 [000] 343.012727: irq_handler_entry: irq=0 handler=timer cc1-18677 [000] 343.032692: irq_handler_entry: irq=0 handler=timer cc1-18677 [000] 343.033690: irq_handler_entry: irq=0 handler=timer cc1-18677 [000] 343.034687: irq_handler_entry: irq=0 handler=timer cc1-18677 [000] 343.035686: irq_handler_entry: irq=0 handler=timer cc1-18677 [000] 343.036684: irq_handler_entry: irq=0 handler=timer While 'irq==0' filters work, the 'handler==<x>' filter expression does not work: $ perf record -R -f -a -e irq:irq_handler_entry --filter handler=timer sleep 1 Error: failed to set filter with 22 (Invalid argument) The problem is that while an 'irq' field exists and is recognized as a filter field - 'handler' does not exist - its name is 'name' in the output. To solve this, we need to synchronize the printout and the field names, wherever possible. In cases where the printout prints a non-field, we enclose that information in square brackets, such as: perf-1380 [013] 724.903505: softirq_exit: vec=9 [action=RCU] perf-1380 [013] 724.904482: softirq_exit: vec=1 [action=TIMER] This way users can use filter expressions more intuitively: all fields that show up as 'primary' (non-bracketed) information is filterable. This patch harmonizes the field names for all irq, bkl, power, sched and timer events. We might in fact think about dropping the print format bit of generic tracepoints altogether, and just print the fields that are being recorded. Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | Merge branch 'tracing/core' into perf/coreIngo Molnar2009-10-151-0/+61
| |\ \ | | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: to add event filter support we need the following commits from the tracing tree: 3f6fe06: tracing/filters: Unify the regex parsing helpers 1889d20: tracing/filters: Provide basic regex support 737f453: tracing/filters: Cleanup useless headers Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | tracing: Separate raw syscall from syscall tracerLai Jiangshan2009-11-251-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current syscall tracer mixes raw syscalls and real syscalls. echo 1 > events/syscalls/enable And we get these from the output: (XXXX insteads " grep-20914 [001] 588211.446347" .. etc) XXXX: sys_read(fd: 3, buf: 80609a8, count: 7000) XXXX: sys_enter: NR 3 (3, 80609a8, 7000, a, 1000, bfce8ef8) XXXX: sys_read -> 0x138 XXXX: sys_exit: NR 3 = 312 XXXX: sys_read(fd: 3, buf: 8060ae0, count: 7000) XXXX: sys_enter: NR 3 (3, 8060ae0, 7000, a, 1000, bfce8ef8) XXXX: sys_read -> 0x138 XXXX: sys_exit: NR 3 = 312 There are 2 drawbacks here. A) two almost identical records are saved in ringbuffer when a syscall enters or exits. (4 records for every syscall) This wastes precious space in the ring buffer. B) the lines including "sys_enter/sys_exit" produces hardly any useful information for the output (no labels). The user can use this method to prevent these drawbacks: echo 1 > events/syscalls/enable echo 0 > events/syscalls/sys_enter/enable echo 0 > events/syscalls/sys_exit/enable But this is not user friendly. So we separate raw syscall from syscall tracer. After this fix applied: syscall tracer's output (echo 1 > events/syscalls/enable): XXXX: sys_read(fd: 3, buf: bfe87d88, count: 200) XXXX: sys_read -> 0x200 XXXX: sys_fstat64(fd: 3, statbuf: bfe87c98) XXXX: sys_fstat64 -> 0x0 XXXX: sys_close(fd: 3) raw syscall tracer's output (echo 1 > events/raw_syscalls/enable): XXXX: sys_enter: NR 175 (0, bf92bf18, bf92bf98, 8, b748cff4, bf92bef8) XXXX: sys_exit: NR 175 = 0 XXXX: sys_enter: NR 175 (2, bf92bf98, 0, 8, b748cff4, bf92bef8) XXXX: sys_exit: NR 175 = 0 XXXX: sys_enter: NR 3 (9, bf927f9c, 4000, b77e2518, b77dce60, bf92bff8) Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <4AEFC37C.5080609@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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