fsync_buffers_list() and sync_dirty_buffer() both issue async writes and
then immediately wait on them. Conceptually, that makes them sync writes
and we should treat them as such so that the IO schedulers can handle
them appropriately.
This patch fixes a write starvation issue that Lin Ming reported, where
xx is stuck for more than 2 minutes because of a large number of
synchronous IO in the system:
INFO: task kjournald:20558 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
kjournald D ffff810010820978 6712 20558 2
ffff81022ddb1d10 0000000000000046 ffff81022e7baa10 ffffffff803ba6f2
ffff81022ecd0000 ffff8101e6dc9160 ffff81022ecd0348 000000008048b6cb
0000000000000086 ffff81022c4e8d30 0000000000000000 ffffffff80247537
Call Trace:
[<ffffffff803ba6f2>] kobject_get+0x12/0x17
[<ffffffff80247537>] getnstimeofday+0x2f/0x83
[<ffffffff8029c1ac>] sync_buffer+0x0/0x3f
[<ffffffff8066d195>] io_schedule+0x5d/0x9f
[<ffffffff8029c1e7>] sync_buffer+0x3b/0x3f
[<ffffffff8066d3f0>] __wait_on_bit+0x40/0x6f
[<ffffffff8029c1ac>] sync_buffer+0x0/0x3f
[<ffffffff8066d48b>] out_of_line_wait_on_bit+0x6c/0x78
[<ffffffff80243909>] wake_bit_function+0x0/0x23
[<ffffffff8029e3ad>] sync_dirty_buffer+0x98/0xcb
[<ffffffff8030056b>] journal_commit_transaction+0x97d/0xcb6
[<ffffffff8023a676>] lock_timer_base+0x26/0x4b
[<ffffffff8030300a>] kjournald+0xc1/0x1fb
[<ffffffff802438db>] autoremove_wake_function+0x0/0x2e
[<ffffffff80302f49>] kjournald+0x0/0x1fb
[<ffffffff802437bb>] kthread+0x47/0x74
[<ffffffff8022de51>] schedule_tail+0x28/0x5d
[<ffffffff8020cac8>] child_rip+0xa/0x12
[<ffffffff80243774>] kthread+0x0/0x74
[<ffffffff8020cabe>] child_rip+0x0/0x12
Lin Ming confirms that this patch fixes the issue. I've run tests with
it for the past week and no ill effects have been observed, so I'm
proposing it for inclusion into 2.6.26.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb: (42 commits)
V4L/DVB (8108): Fix open/close race in saa7134
V4L/DVB (8100): V4L/vivi: fix possible memory leak in vivi_fillbuff
V4L/DVB (8097): xc5000: check device hardware state to determine if firmware download is needed
V4L/DVB (8096): au8522: prevent false-positive lock status
V4L/DVB (8092): videodev: simplify and fix standard enumeration
V4L/DVB (8075): stv0299: Uncorrected block count and bit error rate fixed
V4L/DVB (8074): av7110: OSD transfers should not be interrupted
V4L/DVB (8073): av7110: Catch another type of ARM crash
V4L/DVB (8071): tda10023: Fix possible kernel oops during initialisation
V4L/DVB (8069): cx18: Fix S-Video and Compsite inputs for the Yuan MPC718 and enable card entry
V4L/DVB (8068): cx18: Add I2C slave reset via GPIO upon initialization
V4L/DVB (8067): cx18: Fix firmware load for case when digital capture happens first
V4L/DVB (8066): cx18: Fix audio mux input definitions for HVR-1600 Line In 2 and FM radio
V4L/DVB (8063): cx18: Fix unintended auto configurations in cx18-av-core
V4L/DVB (8061): cx18: only select tuner / frontend modules if !DVB_FE_CUSTOMISE
V4L/DVB (8048): saa7134: Fix entries for Avermedia A16d and Avermedia E506
V4L/DVB (8044): au8522: tuning optimizations
V4L/DVB (8043): au0828: add support for additional USB device id's
V4L/DVB (8042): DVB-USB UMT-010 channel scan oops
V4L/DVB (8040): soc-camera: remove soc_camera_host_class class
...
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
dock: bay: Don't call acpi_walk_namespace() when ACPI is disabled.
ACPI: don't walk tables if ACPI was disabled
thermal: Create CONFIG_THERMAL_HWMON=n
* 'audit.b52' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current:
[PATCH] remove useless argument type in audit_filter_user()
[PATCH] audit: fix kernel-doc parameter notation
[PATCH] kernel/audit.c: nlh->nlmsg_type is gotten more than once
We need to check for existence of the a.out.h header in the source tree,
not the object tree, if we want it to get the right answer with O=.
Signed-off-by: David Woodhouse <david.woodhouse@intel.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
VIDIOC_ENUMSTD did not return all the PAL/SECAM/NTSC variants: it just returned
one single PAL/SECAM/NTSC standard without separate entries for the trickier
standards like NTSC-JP.
Changed the code so that it behaves better.
Also simplified the if/switch statements into a common standards lookup table.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
The S-Video LUMA input was restricted to the In1-In4 inputs, but it
turns out that it can use the full range of In1-In8.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
A bug in libsensors <= 2.10.6 is exposed
when this new hwmon I/F is enabled.
Create CONFIG_THERMAL_HWMON=n
until some time after libsensors 2.10.7 ships
so those users can run the latest kernel.
libsensors 3.x is already fixed -- those users
can use CONFIG_THERMAL_HWMON=y now.
Signed-off-by: Rene Herman <rene.herman@gmail.com>
Acked-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The second argument "type" is not used in audit_filter_user(), so I think that type can be removed. If I'm wrong, please tell me.
Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* 'kvm-updates-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm:
KVM: Remove now unused structs from kvm_para.h
x86: KVM guest: Use the paravirt clocksource structs and functions
KVM: Make kvm host use the paravirt clocksource structs
x86: Make xen use the paravirt clocksource structs and functions
x86: Add structs and functions for paravirt clocksource
KVM: VMX: Fix host msr corruption with preemption enabled
KVM: ioapic: fix lost interrupt when changing a device's irq
KVM: MMU: Fix oops on guest userspace access to guest pagetable
KVM: MMU: large page update_pte issue with non-PAE 32-bit guests (resend)
KVM: MMU: Fix rmap_write_protect() hugepage iteration bug
KVM: close timer injection race window in __vcpu_run
KVM: Fix race between timer migration and vcpu migration
The kvm_* structs are obsoleted by the pvclock_* ones.
Now all users have been switched over and the old structs
can be dropped.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This patch updates the kvm host code to use the pvclock structs.
It also makes the paravirt clock compatible with Xen.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This patch updates the xen guest to use the pvclock structs
and helper functions.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This patch adds structs for the paravirt clocksource ABI
used by both xen and kvm (pvclock-abi.h).
It also adds some helper functions to read system time and
wall clock time from a paravirtual clocksource (pvclock.[ch]).
They are based on the xen code. They are enabled using
CONFIG_PARAVIRT_CLOCK.
Subsequent patches of this series will put the code in use.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Non-PAE operation has been deprecated in Xen for a while, and is
rarely tested or used. xen-unstable has now officially dropped
non-PAE support. Since Xen/pvops' non-PAE support has also been
broken for a while, we may as well completely drop it altogether.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
If a timer fires after kvm_inject_pending_timer_irqs() but before
local_irq_disable() the code will enter guest mode and only inject such
timer interrupt the next time an unrelated event causes an exit.
It would be simpler if the timer->pending irq conversion could be done
with IRQ's disabled, so that the above problem cannot happen.
For now introduce a new vcpu requests bit to cancel guest entry.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Some of the requirement rules are now more relaxed. Also correct a
contradiction in the previous update
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fl_insert and fl_remove are not used right now in the kernel. Remove them.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This patch changes the function reserve_bootmem_node() from void to int,
returning -ENOMEM if the allocation fails.
This fixes a build problem on x86 with CONFIG_KEXEC=y and
CONFIG_NEED_MULTIPLE_NODES=y
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Reported-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
netns: Don't receive new packets in a dead network namespace.
sctp: Make sure N * sizeof(union sctp_addr) does not overflow.
pppoe: warning fix
ipv6: Drop packets for loopback address from outside of the box.
ipv6: Remove options header when setsockopt's optlen is 0
mac80211: detect driver tx bugs
Vast majority of these build failures are gcc-4.3 warnings
about static functions and objects being referenced from
non-static (read: "extern inline") functions, in conjunction
with our -Werror.
We cannot just convert "extern inline" to "static inline",
as people keep suggesting all the time, because "extern inline"
logic is crucial for generic kernel build.
So
- just make sure that all callees of critical "extern inline"
functions are also "extern inline";
- use "static inline", wherever it's possible.
traps.c: work around gcc-4.3 being too smart about array
bounds-checking.
TODO: add "gnu_inline" attribute to all our "extern inline"
functions to ensure desired behaviour with future compilers.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
To calculate addresses of locally defined variables, GCC uses 32-bit
displacement from the GP. Which doesn't work for per cpu variables in
modules, as an offset to the kernel per cpu area is way above 4G.
The workaround is to force allocation of a GOT entry for per cpu variable
using ldq instruction with a 'literal' relocation.
I had to use custom asm/percpu.h, as a required argument magic doesn't
work with asm-generic/percpu.h macros.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, geode: add a VSA2 ID for General Software
x86: use BOOTMEM_EXCLUSIVE on 32-bit
x86, 32-bit: fix boot failure on TSC-less processors
x86: fix NULL pointer deref in __switch_to
x86: set PAE PHYSICAL_MASK_SHIFT to 44 bits.
[ Based upon original report and patch by Karsten Keil. Karsten
has verified that this fixes the TAHI test case "ICMPv6 test
v6LC.5.1.2 Part F". -DaveM ]
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
General Software writes their own VSA2 module for their version
of the Geode BIOS, which returns a different ID then the standard
VSA2. This was causing the framebuffer driver to break for most
GSW boards.
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Cc: tglx@linutronix.de
Cc: linux-geode@lists.infradead.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This allows other threads to run when the serial driver polls the CTS
PIN in a loop.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
When a 64-bit x86 processor runs in 32-bit PAE mode, a pte can
potentially have the same number of physical address bits as the
64-bit host ("Enhanced Legacy PAE Paging"). This means, in theory,
we could have up to 52 bits of physical address in a pte.
The 32-bit kernel uses a 32-bit unsigned long to represent a pfn.
This means that it can only represent physical addresses up to 32+12=44
bits wide. Rather than widening pfns everywhere, just set 2^44 as the
Linux x86_32-PAE architectural limit for physical address size.
This is a bugfix for two cases:
1. running a 32-bit PAE kernel on a machine with
more than 64GB RAM.
2. running a 32-bit PAE Xen guest on a host machine with
more than 64GB RAM
In both cases, a pte could need to have more than 36 bits of physical,
and masking it to 36-bits will cause fairly severe havoc.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
* 'agp-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6:
agp/intel: cleanup some serious whitespace badness
[AGP] intel_agp: Add support for Intel 4 series chipsets
[AGP] intel_agp: extra stolen mem size available for IGD_GM chipset
agp: more boolean conversions.
drivers/char/agp - use bool
agp: two-stage page destruction issue
agp/via: fixup pci ids
Fix three ct_extend/NAT extension related races:
- When cleaning up the extension area and removing it from the bysource hash,
the nat->ct pointer must not be set to NULL since it may still be used in
a RCU read side
- When replacing a NAT extension area in the bysource hash, the nat->ct
pointer must be assigned before performing the replacement
- When reallocating extension storage in ct_extend, the old memory must
not be freed immediately since it may still be used by a RCU read side
Possibly fixes https://bugzilla.redhat.com/show_bug.cgi?id=449315
and/or http://bugzilla.kernel.org/show_bug.cgi?id=10875
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
We've introduced extra need of compat layer for ip_tunnel_prl{}
for PRL (Potential Router List) management. Though compat_ioctl
is still missing in ipv4/ipv6, let's make the interface more
straight-forward and eliminate extra need for nasty compat layer
anyway since the interface is new for 2.6.26.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (21 commits)
[POWERPC] Turn on ATA_SFF so we get SATA_SVW back in defconfigs
[POWERPC] Remove ppc32's export of console_drivers
[POWERPC] Fix -Os kernel builds with newer gcc versions
[POWERPC] Fix bootwrapper builds with newer gcc versions
[POWERPC] Build fix for drivers/macintosh/mediabay.c
[POWERPC] Fix warning in pseries/eeh_driver.c
[POWERPC] Add missing of_node_put in drivers/macintosh/therm_adt746x.c
[POWERPC] Add missing of_node_put in drivers/macintosh/smu.c
[POWERPC] Add missing of_node_put in pseries/nvram.c
[POWERPC] Fix return value check logic in debugfs virq_mapping setup
[POWERPC] Fix rmb to order cacheable vs. noncacheable
powerpc/spufs: fix missed stop-and-signal event
powerpc/spufs: synchronize interaction between spu exception handling and time slicing
powerpc/spufs: remove class_0_dsisr from spu exception handling
powerpc/spufs: wait for stable spu status in spu_stopped()
[POWERPC] bootwrapper: add simpleImage* to list of boot targets
[POWERPC] 83xx: MPC837xRDB's VSC7385 ethernet switch isn't on the MDIO bus
[POWERPC] Updated Freescale PPC defconfigs
[POWERPC] 8610: Update defconfig for MPC8610 HPCD
[POWERPC] 85xx: MPC8548CDS - Fix size of PCIe IO space
...
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
[MIPS] Au1200: MMC resource size off by one
[MIPS] TANBAC: Update defconfig
[MIPS] Vr41xx: Initialize PCI io_map_base
[MIPS] Malta: Always compile MTD platform device registration code.
[MIPS] Malta: Fix build errors for 64-bit kernels
[MIPS] Lasat: sysctl fixup
[MIPS] Fix buggy use of kmap_coherent.
[MIPS] Lasat: bring back from the dead
[MIPS] vpe_id is required for VSMP and SMTC builds
[MIPS] Export smp_call_function and smp_call_function_single.
[MIPS] Bring the SWARM defconfig up to date
[MIPS] Sibyte: Build RTC support as an object
[MIPS] Fix the fix for divide by zero error in build_{clear,copy}_page
[MIPS] Fix build for PNX platforms.
[MIPS] Add RM200 with R5000 CPU to known ARC machines
[MIPS] Better load address for big endian SNI RM
[MIPS] SB1250: Initialize io_map_base
[MIPS] Alchemy: Add au1500 reserved interrupt
[MIPS] Export empty_zero_page for sake of the ext4 module.
This seems to have been removed accidentally in commit
ed7b1889da ("Unexport asm/page.h"), but
wasn't supposed to have been -- the original patch at
http://lkml.org/lkml/2007/10/30/144 just moved it from $(header-y) to
$(unifdef-y)
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This file is only included where it makes sense now, so there's no need
for the CONFIG_ARCH_SUPPORTS_AOUT conditional -- and that conditional is
bad, because we want to export <linux/a.out.h> to userspace.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix build error in CONFIG_IA64_SGI_UV config. (GENERIC builds
are ok).
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Fix 64-bit Malta by using CKSEG0ADDR and correct casts.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
After the common MIPS CPU interrupt controller (for irq0-7) was introduced
the Lasat boards didn't get their interrupts right, so nothing worked. The
old routines need to be offset by the new 8 hardware interrupts common to
all MIPS CPU's.
Signed-off-by: Thomas Horsten <thomas@horsten.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
