| Commit message (Collapse) | Author | Age | Files | Lines |
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* git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (53 commits)
NFS: Fix a resolution problem with nfs_inode->cache_change_attribute
NFS: Fix the resolution problem with nfs_inode_attrs_need_update()
NFS: Changes to inode->i_nlinks must set the NFS_INO_INVALID_ATTR flag
RPC/RDMA: ensure connection attempt is complete before signalling.
RPC/RDMA: correct the reconnect timer backoff
RPC/RDMA: optionally emit useful transport info upon connect/disconnect.
RPC/RDMA: reformat a debug printk to keep lines together.
RPC/RDMA: harden connection logic against missing/late rdma_cm upcalls.
RPC/RDMA: fix connect/reconnect resource leak.
RPC/RDMA: return a consistent error, when connect fails.
RPC/RDMA: adhere to protocol for unpadded client trailing write chunks.
RPC/RDMA: avoid an oops due to disconnect racing with async upcalls.
RPC/RDMA: maintain the RPC task bytes-sent statistic.
RPC/RDMA: suppress retransmit on RPC/RDMA clients.
RPC/RDMA: fix connection IRD/ORD setting
RPC/RDMA: support FRMR client memory registration.
RPC/RDMA: check selected memory registration mode at runtime.
RPC/RDMA: add data types and new FRMR memory registration enum.
RPC/RDMA: refactor the inline memory registration code.
NFS: fix nfs_parse_ip_address() corner case
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It appears that 'jiffies' timestamps do not have high enough resolution for
nfs_inode_attrs_need_update(). One problem is that a GETATTR can be
launched within < 1 jiffy of the last operation that updated the attribute.
Another problem is that RPC calls can take < 1 jiffy to execute.
We can fix this by switching the variables to use a simple global counter
that gets incremented every time we start another GETATTR call.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Add defensive timeouts to wait_for_completion() calls in RDMA
address resolution, and make them interruptible. Fix the timeout
units to milliseconds (formerly jiffies) and move to private header.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Internal RPC/RDMA structure updates in preparation for FRMR support.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Acked-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Peter Staubach suggested reducing NFS4_SETCLIENTID_NAMELEN by one byte so
as to avoid 7 bytes of unnecessary padding.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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The sc_name field is currently 56 bytes long. This is not large enough
to hold a pair of IPv6 addresses, the authentication type, the protocol
name, and a uniquifier number. The maximum possible size of the name
string using IPv6 addresses is just under 110 bytes, so I increased the
size of the sc_name field to accomodate this maximum.
In addition, the strings in the nfs4_setclientid structure are
constructed with scnprintf(), which wants to terminate its output with
'\0'. The sc_netid field was large enough only for a three byte netid
string and a '\0' so inet6 netids were being truncated. Perhaps we
don't need the overhead of scnprintf() to do a simple string copy, but
I fixed this by increasing the size of the buffer by one byte.
Since all three of the string buffers in nfs4_setclientid are
constructed with scnprintf(), I increased the size of all three by one
byte to document the requirement, although I don't think either the
universal address field or the name field will be so small that these
strings get truncated in this way.
The size of the Linux client's client ID on the wire will be larger
than before. RFC 3530 suggests the size limit for client IDs is 1024,
and we are still well below that.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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remove 8 bytes of padding from struct nfs_fattr on 64 bit builds
This also removes padding from several nfs structures, including
16 bytes from nfs4_opendata, nfs4_createdata,nfs3_createdata
& 8 bytes from nfs_read_data,nfs_write_data,nfs_removeres,nfs4_closedata
This also reduces the reported stack usage of many nfs functions (30+).
Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
----
This patch is against the latest git 2.6.27-rc4.
I've built & run this on my AMD64 desktop, & successfully run _simple_
tests with a 64 bit client => 32 bit server & 32 bit client to 64 bit
server.
On fedora with gcc (GCC) 4.3.0 20080428 (Red Hat 4.3.0-8) checkpatch
reports 33 functions with reduced stack usage.
e.g.
__nfs_revalidate_inode [nfs] 216 => 200
_nfs4_proc_access [nfs] 304 => 288
_nfs4_proc_link [nfs] 536 => 504
_nfs4_proc_remove [nfs] 304 => 288
_nfs4_proc_rename [nfs] 584 => 552
nfs3_proc_access [nfs] 272 => 256
nfs3_proc_getacl [nfs] 384 => 368
nfs3_proc_link [nfs] 496 => 464
etc
I can supply the complete list if anyone is interested.
regards
Richard
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Currently, if two processes are both trying to revalidate metadata for the
same inode, they will find themselves being serialised. There is no good
justification for this now that we have improved our ability to detect
stale attribute data, so we should remove that serialisation.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Add the flag NFS_MOUNT_LOOKUP_CACHE_NONEG to turn off the caching of
negative dentries. In reality what we do is to force
nfs_lookup_revalidate() to always discard negative dentries.
Add the flag NFS_MOUNT_LOOKUP_CACHE_NONE for enforcing stricter
revalidation of dentries. It forces the revalidate code to always do a
lookup instead of just checking the cached mtime of the parent directory.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Instead of causing umount requests to block on server->active_wq while the
asynchronous sillyrename deletes are executing, we can use the sb->s_active
counter to obtain a reference to the super_block, and then release that
reference in nfs_async_unlink_release().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
* 'kvm-updates/2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (134 commits)
KVM: ia64: Add intel iommu support for guests.
KVM: ia64: add directed mmio range support for kvm guests
KVM: ia64: Make pmt table be able to hold physical mmio entries.
KVM: Move irqchip_in_kernel() from ioapic.h to irq.h
KVM: Separate irq ack notification out of arch/x86/kvm/irq.c
KVM: Change is_mmio_pfn to kvm_is_mmio_pfn, and make it common for all archs
KVM: Move device assignment logic to common code
KVM: Device Assignment: Move vtd.c from arch/x86/kvm/ to virt/kvm/
KVM: VMX: enable invlpg exiting if EPT is disabled
KVM: x86: Silence various LAPIC-related host kernel messages
KVM: Device Assignment: Map mmio pages into VT-d page table
KVM: PIC: enhance IPI avoidance
KVM: MMU: add "oos_shadow" parameter to disable oos
KVM: MMU: speed up mmu_unsync_walk
KVM: MMU: out of sync shadow core
KVM: MMU: mmu_convert_notrap helper
KVM: MMU: awareness of new kvm_mmu_zap_page behaviour
KVM: MMU: mmu_parent_walk
KVM: x86: trap invlpg
KVM: MMU: sync roots on mmu reload
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With intel iommu hardware, we can assign devices to kvm/ia64 guests.
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Moving irq ack notification logic as common, and make
it shared with ia64 side.
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Add a kvm_ prefix to avoid polluting kernel's name space.
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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To share with other archs, this patch moves device assignment
logic to common parts.
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Assigned device could DMA to mmio pages, so also need to map mmio pages
into VT-d page table.
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
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Cache the unsynced children information in a per-page bitmap.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
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Allow guest pagetables to go out of sync. Instead of emulating write
accesses to guest pagetables, or unshadowing them, we un-write-protect
the page table and allow the guest to modify it at will. We rely on
invlpg executions to synchronize individual ptes, and will synchronize
the entire pagetable on tlb flushes.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
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With pages out of sync invlpg needs to be trapped. For now simply nuke
the entry.
Untested on AMD.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
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Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
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Examine guest pagetable and bring the shadow back in sync. Caller is responsible
for local TLB flush before re-entering guest mode.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
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Based on a patch by: Kay, Allen M <allen.m.kay@intel.com>
This patch enables PCI device assignment based on VT-d support.
When a device is assigned to the guest, the guest memory is pinned and
the mapping is updated in the VT-d IOMMU.
[Amit: Expose KVM_CAP_IOMMU so we can check if an IOMMU is present
and also control enable/disable from userspace]
Signed-off-by: Kay, Allen M <allen.m.kay@intel.com>
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Ben-Ami Yassour <benami@il.ibm.com>
Signed-off-by: Amit Shah <amit.shah@qumranet.com>
Acked-by: Mark Gross <mgross@linux.intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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This patch extends the VT-d driver to support KVM
[Ben: fixed memory pinning]
[avi: move dma_remapping.h as well]
Signed-off-by: Kay, Allen M <allen.m.kay@intel.com>
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Ben-Ami Yassour <benami@il.ibm.com>
Signed-off-by: Amit Shah <amit.shah@qumranet.com>
Acked-by: Mark Gross <mgross@linux.intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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For MSR_IA32_FEATURE_CONTROL is already there.
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Offline or uninitialized vcpu's can be executed if requested to perform
userspace work.
Follow Avi's suggestion to handle halted vcpu's in the main loop,
simplifying kvm_emulate_halt(). Introduce a new vcpu->requests bit to
indicate events that promote state from halted to running.
Also standardize vcpu wake sites.
Signed-off-by: Marcelo Tosatti <mtosatti <at> redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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These can help show whether a guest is making progress or not.
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Signed-off-by: Avi Kivity <avi@qumranet.com>
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Remove unused field: struct kvm_assigned_pci_dev assigned_dev
from struct: struct kvm_assigned_dev_kernel
Signed-off-by: Ben-Ami Yassour <benami@il.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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We're in a hot path. We can't use kmalloc() because
it might impact performance. So, we just stick the buffer that
we need into the kvm_vcpu_arch structure. This is used very
often, so it is not really a waste.
We also have to move the buffer structure's definition to the
arch-specific x86 kvm header.
Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Based on a patch from: Amit Shah <amit.shah@qumranet.com>
This patch adds support for handling PCI devices that are assigned to
the guest.
The device to be assigned to the guest is registered in the host kernel
and interrupt delivery is handled. If a device is already assigned, or
the device driver for it is still loaded on the host, the device
assignment is failed by conveying a -EBUSY reply to the userspace.
Devices that share their interrupt line are not supported at the moment.
By itself, this patch will not make devices work within the guest.
The VT-d extension is required to enable the device to perform DMA.
Another alternative is PVDMA.
Signed-off-by: Amit Shah <amit.shah@qumranet.com>
Signed-off-by: Ben-Ami Yassour <benami@il.ibm.com>
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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KVM intends to use paravirt code to calibrate khz. Xen
current code will do just fine. So as a first step, factor out
code to pvclock.c.
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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This can be used by kvm subsystems that are interested in when
interrupts are acked, for example time drift compensation.
Signed-off-by: Avi Kivity <avi@qumranet.com>
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This patch adds a trace point for the instruction emulation on embedded powerpc
utilizing the KVM_TRACE interface.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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This patch adds trace points to track powerpc TLB activities using the
KVM_TRACE infrastructure.
Signed-off-by: Jerone Young <jyoung5@us.ibm.com>
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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The current kvmtrace code uses get_cycles() while the interpretation would be
easier using using nanoseconds. ktime_get() should give at least the same
accuracy as get_cycles on all architectures (even better on 32bit archs) but
at a better unit (e.g. comparable between hosts with different frequencies.
[avi: avoid ktime_t in public header]
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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This patch fixes kvmtrace use on big endian systems. When using bit fields the
compiler will lay data out in the wrong order expected when laid down into a
file.
This fixes it by using one variable instead of using bit fields.
Signed-off-by: Jerone Young <jyoung5@us.ibm.com>
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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As we execute real mode guests in VM86 mode, exception have to be
reinjected appropriately when the guest triggered them. For this purpose
the patch adopts the real-mode injection pattern used in vmx_inject_irq
to vmx_queue_exception, additionally taking care that the IP is set
correctly for #BP exceptions. Furthermore it extends
handle_rmode_exception to reinject all those exceptions that can be
raised in real mode.
This fixes the execution of himem.exe from FreeDOS and also makes its
debug.com work properly.
Note that guest debugging in real mode is broken now. This has to be
fixed by the scheduled debugging infrastructure rework (will be done
once base patches for QEMU have been accepted).
Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Similar to the exception queue, this hold interrupts that have been
accepted by the virtual processor core but not yet injected.
Not yet used.
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Instead of processing nmi injection failure in the vm entry path, move
it to the vm exit path (vm_complete_interrupts()). This separates nmi
injection from nmi post-processing, and moves the nmi state from the VT
state into vcpu state (new variable nmi_injected specifying an injection
in progress).
Signed-off-by: Avi Kivity <avi@qumranet.com>
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Move KVM trace definitions from x86 specific kvm headers to common kvm
headers to create a cross-architecture numbering scheme for trace
events. This means the kvmtrace_format userspace tool won't need to know
which architecture produced the log file being processed.
Signed-off-by: Jerone Young <jyoung5@us.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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As suggested by Avi, introduce accessors to read/write guest registers.
This simplifies the ->cache_regs/->decache_regs interface, and improves
register caching which is important for VMX, where the cost of
vmcs_read/vmcs_write is significant.
[avi: fix warnings]
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
do_generic_file_read: s/EINTR/EIO/ if lock_page_killable() fails
softirq, warning fix: correct a format to avoid a warning
softirqs, debug: preemption check
x86, pci-hotplug, calgary / rio: fix EBDA ioremap()
IO resources, x86: ioremap sanity check to catch mapping requests exceeding, fix
IO resources, x86: ioremap sanity check to catch mapping requests exceeding the BAR sizes
softlockup: Documentation/sysctl/kernel.txt: fix softlockup_thresh description
dmi scan: warn about too early calls to dmi_check_system()
generic: redefine resource_size_t as phys_addr_t
generic: make PFN_PHYS explicitly return phys_addr_t
generic: add phys_addr_t for holding physical addresses
softirq: allocate less vectors
IO resources: fix/remove printk
printk: robustify printk, update comment
printk: robustify printk, fix #2
printk: robustify printk, fix
printk: robustify printk
Fixed up conflicts in:
arch/powerpc/include/asm/types.h
arch/powerpc/platforms/Kconfig.cputype
manually.
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'core/printk' and 'core/misc' into core-v28-for-linus
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fix:
include/linux/kernel.h: In function ‘printk_needs_cpu':
include/linux/kernel.h:217: error: parameter name omitted
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Avoid deadlocks against rq->lock and xtime_lock by deferring the klogd
wakeup by polling from the timer tick.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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the BAR sizes
Go through the iomem resource tree to check if any of the ioremap()
requests span more than any slot in the iomem resource tree and do
a WARN_ON() if we hit this check.
This will raise a red-flag, if some driver is mapping more than what
is needed. And hopefully identify possible corruptions much earlier.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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There's no good reason why a resource_size_t shouldn't just be a
physical address, so simply redefine it in terms of phys_addr_t.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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PFN_PHYS, as its name suggests, turns a pfn into a physical address.
However, it is a macro which just operates on its argument without
modifying its type. pfns are typed unsigned long, but an unsigned
long may not be long enough to hold a physical address (32-bit systems
with more than 32 bits of physcial address).
Make sure we cast to phys_addr_t to return a complete result.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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