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* [PATCH] s390: default storage keyPeter Oberparleiter2005-05-018-16/+41
| | | | | | | | | Provide an easy way to define a non-zero storage key at compile time. This is useful for debugging purposes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: fix memory holes and cleanup setup_archHeiko Carstens2005-05-012-176/+224
| | | | | | | | | | | | | | | | The memory setup didn't take care of memory holes and this makes the memory management think there would be more memory available than there is in reality. That causes the OOM killer to kill processes even if there is enough memory left that can be written to the swap space. The patch fixes this by using free_area_init_node with an array of memory holes instead of free_area_init. Further the patch cleans up the code in setup.c by splitting setup_arch into smaller pieces. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: idle timer setupMartin Schwidefsky2005-05-012-15/+22
| | | | | | | | | | Fix overflow in calculation of the new tod value in stop_hz_timer and fix wrong virtual timer list idle time in case the virtual timer is already expired in stop_cpu_timer. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: regenerate defconfigMartin Schwidefsky2005-05-011-5/+14
| | | | | | | | Regenerate the default configuration for s390. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml ubd: handle readonly statusPaolo 'Blaisorblade' Giarrusso2005-05-011-4/+10
| | | | | | | | | | | | | | | | Use the set_disk_ro() API when the backing file is read-only, to mark the disk read-only, during the ->open(). The current hack does not work when doing a mount -o remount. Also, mark explicitly the code paths which should no more be triggerable (I've removed the WARN_ON(1) things). They should actually become BUG()s probably but I'll avoid that since I'm not so sure the change works so well. I gave it only some limited testing. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> CC: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: commentary about forking flagPaolo 'Blaisorblade' Giarrusso2005-05-011-0/+4
| | | | | | | | Add some commentary about UML internals, for a strange trick. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml - hostfs: avoid buffersPaolo 'Blaisorblade' Giarrusso2005-05-011-1/+1
| | | | | | | | | | | | | | | | | | | Use this: .set_page_dirty = __set_page_dirty_nobuffers, We already dropped the inclusion of <linux/buffer_head.h>, and we don't have a backing block device for this FS. "Without having looked at it, I'm sure that hostfs does not use buffer_heads. So setting your ->set_page_dirty a_op to point at __set_page_dirty_nobuffers() is a reasonable thing to do - it'll provide a slight speedup." This speedup is one less spinlock held and one less conditional branch, which isn't bad. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: redo console lockingPaolo 'Blaisorblade' Giarrusso2005-05-015-175/+239
| | | | | | | | | Fix some console locking problems (including scheduling in atomic) and various reorderings and cleanup in that code. Not yet ready for 2.6.12 probably. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix syscall table by including $(SUBARCH)'s one, for x86-64Paolo 'Blaisorblade' Giarrusso2005-05-015-318/+73
| | | | | | | | | | | | | | | | | | Reuse asm-x86-64/unistd.h to build our syscall table, like x86-64 already does. Like for i386, we must add some #defines for all the (right!) changes UML does to x86-64 syscall table. Note: I noted a bogus: [ __NR_sched_yield ] = (syscall_handler_t *) yield, while doing this patch (which could only be a workaround for some strange bug, but I would ignore this possibility). I'm changing this without notice. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: quick fix syscall table for x86_64Paolo 'Blaisorblade' Giarrusso2005-05-011-29/+24
| | | | | | | | | | | | | | | | | | Fix the moved syscall table for the x86_64 SUBARCH: - redirect __NR_chown and such to versions aware of 32-bit UIDs, - avoid the useless hack for sys_nfsservctl, - use sys_sendfile64 in the table rather than sys_sendfile. - __NR_uselib is sys_ni_syscall on x86_64 (which does not support A.OUT). - __NR_getrlimit is sys_getrlimit, not sys_old_getrlimit Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix syscall table by including $(SUBARCH)'s one, for i386Paolo 'Blaisorblade' Giarrusso2005-05-019-407/+321
| | | | | | | | | | | | | | | | Split the i386 entry.S files into entry.S and syscall_table.S which is included in the previous one (so actually there is no difference between them) and use the syscall_table.S in the UML build, instead of tracking by hand the syscall table changes (which is inherently error-prone). We must only insert the right #defines to inject the changes we need from the i386 syscall table (for instance some different function names); also, we don't implement some i386 syscalls, as ioperm(), nor some TLS-related ones (yet to provide). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: move va_copy conditional defPaolo 'Blaisorblade' Giarrusso2005-05-012-2/+7
| | | | | | | | | | GCC 2.95 uses __va_copy instead of va_copy. Handle it inside compiler.h instead of in a casual file, and avoid the risk that this breaks with a newer compiler (which it could do). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: inline empty procPaolo 'Blaisorblade' Giarrusso2005-05-012-5/+5
| | | | | | | | Cleanup: make an inline of this empty proc. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: support AES i586 crypto driverPaolo 'Blaisorblade' Giarrusso2005-05-019-13/+22
| | | | | | | | | | | | | | | | | | | | We want to make possible, for the user, to enable the i586 AES implementation. This requires a restructure. - Add a CONFIG_UML_X86 to notify that we are building a UML for i386. - Rename CONFIG_64_BIT to CONFIG_64BIT as is used for all other archs - Tell crypto/Kconfig that UML_X86 is as good as X86 - Tell it that it must exclude not X86_64 but 64BIT, which will give the same results. - Tell kbuild to descend down into arch/i386/crypto/ to build what's needed. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: workaround old problematic sed behaviourRob Landley2005-05-011-1/+2
| | | | | | | | | | | | | Old versions of sed from 1998 (predating the first release of gcc 2.95, but still in use by debian stable) don't understand the single-line version of the sed append command. Since newer versions of sed still understand the... ahem, "vintage" form of the command, change our code to use that. Signed-off-by: Rob Landley <rob@landley.net> Acked-by: Ian McDonald <imcdnzl@gmail.com> Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix handling of no fpx_regsAndree Leidenfrost2005-05-011-3/+4
| | | | | | | | | | | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Fix the error path, which is triggered when the processor misses the fpx regs (i.e. the "fxsr" cpuinfo feature). For instance by VIA C3 Samuel2. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: add nfsd syscall when nfsd is modularblaisorblade@yahoo.it2005-05-011-7/+1
| | | | | | | | | | | | This trick is useless, because sys_ni.c will handle this problem by itself, like it does even on UML for other syscalls. Also, it does not provide the NFSD syscall when NFSD is compiled as a module, which is a big problem. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix oops related to exception tableJeff Dike2005-05-011-5/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Prevent the kernel from oopsing during the extable sorting, as it can do now, because the extable is in the readonly section of the binary. Jeff says: The exception table turned RO in 2.6.11-rc3-mm1 for some reason. Moving it causes it to land in the writable data section of the binary. Paolo says: This patch fixes a oops on startup, which can be easily triggered by compiling with CONFIG_MODE_TT disabled, and STATIC_LINK either disabled or enabled. The resulting kernel will always Oops on startup, after printing this simple output: I've verified, by binary search on the BitKeeper repository (synced up as of 2.6.12-rc2), starting from the range 2.6.11-2.6.12-rc1, that this bug shows up on BitKeeper revisions in the range [@1.1994.11.168,+inf), i.e. starting from this: [PATCH] lib/sort: Replace insertion sort in exception tables Since UML does not use the exception table, it's likely that insertion sort didn't happen to write anything on the table. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] hp100: fix card namesPavel Machek2005-05-011-2/+2
| | | | | | | | | Those cards really need A in their names. Otherwise it is pretty hard to find anything about them on the net. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: saved_command_line overflow fixAlexander Nyberg2005-05-011-3/+0
| | | | | | | | | This strcpy can run off the end of saved_command_line, and we don't need it any more anyway. Signed-off-by: Alexander Nyberg <alexn@telia.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86-64: Handle empty E820 regions correctlyVenkatesh Pallipadi2005-05-011-8/+18
| | | | | | | | | | | | Brings sanitize_e820_map() in x86-64 in sync with that of i386. x86_64 version was missing the changes from this patch. http://linux.bkbits.net:8080/linux-2.6/cset@3e5e4083Y3HevldZl5KCy94V4DcZww?nav=index.html|src/|src/arch|src/arch/i386|src/arch/i386/kernel|related/arch/i386/kernel/setup.c Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Acked-by: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Linux 2.6.x VM86 interrupt emulation fixesPavel Pisa2005-05-011-6/+9
| | | | | | | | | | | | | | | | | | | | | | | Patch solves VM86 interrupt emulation deadlock on SMP systems. The VM86 interrupt emulation has been heavily tested and works well on UP systems after last update, but it seems to deadlock when we have used it on SMP/HT boxes now. It seems, that disable_irq() cannot be called from interrupts, because it waits until disabled interrupt handler finishes (/kernel/irq/manage.c:synchronize_irq():while(IRQ_INPROGRESS);). This blocks one CPU after another. Solved by use disable_irq_nosync. There is the second problem. If IRQ source is fast, it is possible, that interrupt is sometimes processed and re-enabled by the second CPU, before it is disabled by the first one, but negative IRQ disable depths are not allowed. The spinlocking and disabling IRQs over call to disable_irq_nosync/enable_irq is the only solution found reliable till now. Signed-off-by: Michal Sojka <sojkam1@control.felk.cvut.cz> Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Increase number of e820 entries hard limit from 32 to 128Venkatesh Pallipadi2005-05-0110-18/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | The specifications that talk about E820 map doesn't have an upper limit on the number of e820 entries. But, today's kernel has a hard limit of 32. With increase in memory size, we are seeing the number of E820 entries reaching close to 32. Patch below bumps the number upto 128. The patch changes the location of EDDBUF in zero-page (as it comes after E820). As, EDDBUF is not used by boot loaders, this patch should not have any effect on bootloader-setup code interface. Patch covers both i386 and x86-64. Tested on: * grub booting bzImage * lilo booting bzImage with EDID info enabled * pxeboot of bzImage Side-effect: bss increases by ~ 2K and init.data increases by ~7.5K on all systems, due to increase in size of static arrays. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: interrupt handling fixAndi Kleen2005-05-011-1/+4
| | | | | | | | | | - Initialize workmask correctly on interrupt signal handling - Readd missing cli's in the interrupt return path. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] cpuid x87 bit on AMD falsely marked as PNIZwane Mwaikambo2005-05-012-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | http://bugme.osdl.org/show_bug.cgi?id=4426 vendor_id : AuthenticAMD cpu family : 6 model : 10 model name : AMD Athlon(tm) XP stepping : 0 cpu MHz : 2204.807 <snipped> cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse pni syscall mmxext 3dnowext 3dnow bogomips : 4358.14 We're marking bit 0 of extended function 0x80000001 cpuid as PNI support on AMD processors, when it actually denotes x87 FPU present. Patch for i386 and x86_64 below. Signed-off-by: Zwane Mwaikambo <zwane@arm.linux.org.uk> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] hda_intel: Intel ESB2 supportJason Gaston2005-05-011-1/+3
| | | | | | | | This adds the Intel ESB2 HD Audio DID to the hda_intel.c audio driver. Signed-off-by:  Jason Gaston <Jason.d.gaston@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] irq and pci_ids for Intel ICH7DH & ICH7-M DHJason Gaston2005-05-012-0/+4
| | | | | | | | | This patch adds the Intel ICH7DH and ICH7-M DH DID's to the irq.c and pci_ids.h files. Signed-off-by:  Jason Gaston <Jason.d.gaston@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386: fix hpet for systems that don't support legacy replacementjohn stultz2005-05-015-27/+37
| | | | | | | | | | | | | | | Currently the i386 HPET code assumes the entire HPET implementation from the spec is present. This breaks on boxes that do not implement the optional legacy timer replacement functionality portion of the spec. This patch, which is very similar to my x86-64 patch for the same issue, fixes the problem allowing i386 systems that cannot use the HPET for the timer interrupt and RTC to still use the HPET as a time source. I've tested this patch on a system systems without HPET, with HPET but without legacy timer replacement, as well as HPET with legacy timer replacement. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] CPUID bug and inconsistency fixH. Peter Anvin2005-05-013-8/+20
| | | | | | | | | | | | | | The recent support for K8 multicore was misported from x86-64 to i386, due to an unnecessary inconsistency between the CPUID code. Sure, there is are no x86-64 VIA chips yet, but it should happen eventually. This patch fixes the i386 bug as well as makes x86-64 match i386 in the handing of the CPUID array. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Enable write combining for server works LE rev > 6Lee Revell2005-05-011-5/+9
| | | | | | | | | Enable write combining for server works LE rev > 6 per http://www.ussg.iu.edu/hypermail/linux/kernel/0104.3/1007.html Signed-Off-By: Lee Revell <rlrevell@joe-job.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: entry.S trap return fixesStas Sergeev2005-05-012-7/+2
| | | | | | | | | | | do_debug() and do_int3() return void. This patch fixes the CONFIG_KPROBES variant of do_int3() to return void too and adjusts entry.S accordingly. Signed-off-by: Stas Sergeev <stsp@aknet.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86 reboot: Add reboot fixup for gx1/cs5530aJaya Kumar2005-05-015-0/+87
| | | | | | | | | | | This patch by Jaya Kumar introduces a generic infrastructure to deal with x86 chipsets with nonstandard reset sequences, and adds support for the Geode gx1/cs5530a chipset. Signed-off-by: Jaya Kumar <jayalk@intworks.biz> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] check nmi watchdog is brokenJack F Vogel2005-05-018-17/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | A bug against an xSeries system showed up recently noting that the check_nmi_watchdog() test was failing. I have been investigating it and discovered in both i386 and x86_64 the recent change to the routine to use the cpu_callin_map has uncovered a problem. Prior to that change, on an SMP box, the test was trivally passing because all cpu's were found to not yet be online, but now with the callin_map they are discovered, it goes on to test the counter and they have not yet begun to increment, so it announces a CPU is stuck and bails out. On all the systems I have access to test, the announcement of failure is also bougs... by the time you can login and check /proc/interrupts, the NMI count is happily incrementing on all CPUs. Its just that the test is being done too early. I have tried moving the call to the test around a bit, and it was always too early. I finally hit on this proposed solution, it delays the routine via a late_initcall(), seems like the right solution to me. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386/x86_64 segment register access updateH. J. Lu2005-05-014-13/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The new i386/x86_64 assemblers no longer accept instructions for moving between a segment register and a 32bit memory location, i.e., movl (%eax),%ds movl %ds,(%eax) To generate instructions for moving between a segment register and a 16bit memory location without the 16bit operand size prefix, 0x66, mov (%eax),%ds mov %ds,(%eax) should be used. It will work with both new and old assemblers. The assembler starting from 2.16.90.0.1 will also support movw (%eax),%ds movw %ds,(%eax) without the 0x66 prefix. I am enclosing patches for 2.4 and 2.6 kernels here. The resulting kernel binaries should be unchanged as before, with old and new assemblers, if gcc never generates memory access for unsigned gsindex; asm volatile("movl %%gs,%0" : "=g" (gsindex)); If gcc does generate memory access for the code above, the upper bits in gsindex are undefined and the new assembler doesn't allow it. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fix i386 memcpyDenis Vlasenko2005-05-011-28/+61
| | | | | | | | | | | | | This patch shortens non-constant memcpy() by two bytes and fixes spurious out-of-line constant memcpy(). # size vmlinux.org vmlinux text data bss dec hex filename 3954591 1553426 236544 5744561 57a7b1 vmlinux.org 3952615 1553426 236544 5742585 579ff9 vmlinux Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: reverse prediction on spinlock busy loop codeJake Moilanen2005-05-011-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On our raw spinlocks, we currently have an attempt at the lock, and if we do not get it we enter a spin loop. This spinloop will likely continue for awhile, and we pridict likely. Shouldn't we predict that we will get out of the loop so our next instructions are already prefetched. Even when we miss because the lock is still held, it won't matter since we are waiting anyways. I did a couple quick benchmarks, but the results are inconclusive. 16-way 690 running specjbb with original code # ./specjbb 3000 16 1 1 19 30 120 ... Valid run, Score is 59282 16-way 690 running specjbb with unlikely code # ./specjbb 3000 16 1 1 19 30 120 ... Valid run, Score is 59541 I saw a smaller increase on a JS20 (~1.6%) JS20 specjbb w/ original code # ./specjbb 400 2 1 1 19 30 120 ... Valid run, Score is 20460 JS20 specjbb w/ unlikely code # ./specjbb 400 2 1 1 19 30 120 ... Valid run, Score is 20803 Anton said: Mispredicting the spinlock busy loop also means we slow down the rate at which we do the loads which can be good for heavily contended locks. Note: There are some gcc issues with our default build and branch prediction, but a CONFIG_POWER4_ONLY build should emit them correctly. I'm working with Alan Modra on it now. Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] use smp_mb/wmb/rmb where possibleakpm@osdl.org2005-05-0111-31/+31
| | | | | | | | | Replace a number of memory barriers with smp_ variants. This means we won't take the unnecessary hit on UP machines. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: use smp_mb and smp_wmbAnton Blanchard2005-05-012-12/+12
| | | | | | | | Use smp_mb and smp_wmb. In particular smp_wmb is lighter weight than wmb. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: enforce medium thread priority in hypervisor callsAnton Blanchard2005-05-011-0/+8
| | | | | | | | | Calls into the hypervisor do not raise the thread priority. Ensure we are running at medium priority upon entry to the hypervisor. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: firmware workaroundAnton Blanchard2005-05-011-1/+7
| | | | | | | | | | Recent gcc 4.0 testing uncovered a firmware issue. Some properties are larger than 31 bytes and due to gcc 4.0s better stack allocation this overflow ran over non volatile register storage. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: remove unnecessary includeAnton Blanchard2005-05-011-2/+0
| | | | | | | | We no longer use any ppcdebug stuff in a.out.h, so remove the define. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: noexec fixesAnton Blanchard2005-05-012-5/+18
| | | | | | | | | | | | | | | | | | There were a few issues with the ppc64 noexec support: The 64bit ABI has a non executable stack by default. At the moment 64bit apps require a PT_GNU_STACK section in order to have a non executable stack. Disable the read implies exec workaround on the 64bit ABI. The 64bit toolchain has never had problems with incorrect mmap permissions (the 32bit has, thats why we need to retain the workaround). With these fixes as well as a gcc fix from Alan Modra (that was recently committed) 64bit apps work as expected. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] PPC64: Remove hot busy-wait loop in __hash_pageOlof Johansson2005-05-011-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | It turns out that our current __hash_page code will do a very hot busy-wait loop waiting on _PAGE_BUSY to be cleared. It even does ldarx/stdcx in the loop, which will bounce reservations around like crazy if there's more than one CPU spinning on the same PTE (or even another PTE in the same reservation granule). The end result is that each fault takes longer when there's contention, which in turn increases the chance of another thread hitting the same fault and also piling up. Not pretty. There's two options here: 1. Do an out-of-line busy loop a'la spinlocks with just loads (no reserves) 2. Just bail and refault if needed. (2) makes sense here: If the PTE is busy, chances are it's in flux anyway and the other code path making a change might just be ready to hash it. This fixes a stampede seen on a large-ish system where a multithreaded HPC app faults in the same text pages on several cpus at the same time. Signed-off-by: Olof Johansson <olof@lixom.net> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: tell firmware about kernel capabilitiesPaul Mackerras2005-05-012-10/+157
| | | | | | | | | | | | | | On pSeries systems, according to the platform architecture specs, we are supposed to be supplying a structure to firmware that tells firmware about our capabilities, such as which version of the data structures that describe available memory we are expecting to see. The way we end up having to supply this data structure is a bit gross, since it was designed for AIX and doesn't suit us very well. This patch adds the code to supply this data structure to the firmware. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: update to use the new 4L headersBenjamin Herrenschmidt2005-05-014-139/+147
| | | | | | | | | This patch converts ppc64 to use the generic pgtable-nopud.h instead of the "fixup" header. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: nvram cleanupsakpm@osdl.org2005-05-011-9/+8
| | | | | | | | | | | - Fix arch/ppc64/kernel/nvram.c:342: warning: `part' might be used uninitialized in this function - Various codingstyle tweaks. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: Fix irq parsing on powermacPaul Mackerras2005-05-011-0/+4
| | | | | | | | | | | | | | | | | | | When I tried Ben's patches to the powermac sound driver on my G5, I found that it was taking enormous numbers of sound DMA transmit interrupts. This turned out to be because it was incorrectly configured as level-sensitive instead of edge-sensitive, which in turn was because the code that parses the interrupt tree that Open Firmware gives us was incorrectly assigning another device the same irq number as the sound DMA transmit interrupt (i.e. 1). This patch fixes the problem, in a somewhat quick and dirty way for now, but one which will work for all the machines we currently run on. Ultimately Ben and I want to do something more general and robust, but this should go in for 2.6.12. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: remove unused argument to create_slbeOlof Johansson2005-05-011-5/+4
| | | | | | | | | | Remove vsid argument to create_slbe, since it's no longer used. Spotted by R Sharada. Signed-off-by: Olof Johansson <olof@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ppc64: add PT_NOTE section to vDSOBenjamin Herrenschmidt2005-05-016-3/+35
| | | | | | | | | | | | | | | | | | | | This patch from Roland adds a PT_NOTE section to both 32 and 64 bits vDSOs to expose the kernel version to glibc, thus avoiding a uname syscall on every launch. This is equivalent to the patches Roland posted already for x86 and x86-64. Note: the 64 bits .note is actually using the 32 bits format. This is normal. The ELF spec specifies a different format for 64 bits .note, but for some reason, this was never properly implemented, the core dumps for example are all using 32 bits format .note, and binutils cannot even read a 64 bits format .note. Talking to our toolchain folks, they think we'd rather stick to 32 bits format .note everywhere and get the spec fixed some day ... Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] pmac: save master volume on sleepColin Leroy2005-05-011-0/+5
| | | | | | | | | | | | | | | | | | Ben's patch that shutdowns master switch and restores it after resume ("pmac: Improve sleep code of tumbler driver") isn't enough here on an iBook (snapper chip). The master switch is correctly saved and restored, but somehow tumbler_put_master_volume() gets called just after tumbler_set_master_volume() and sets mix->master_vol[*] to 0. So, on resuming, the master switch is reenabled, but the volume is set to 0. Here's a patch that also saves and restores master_vol. Signed-off-by: Colin Leroy <colin@colino.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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