* mmotm 2011-01-25-15-47 uploaded
@ 2011-01-25 23:48 akpm
2011-01-26 8:45 ` CAI Qian
2011-01-26 10:20 ` [patch] epoll-fix-compiler-warning-and-optimize-the-non-blocking-path-fix Johannes Weiner
0 siblings, 2 replies; 7+ messages in thread
From: akpm @ 2011-01-25 23:48 UTC (permalink / raw)
To: mm-commits, linux-kernel, linux-mm, linux-fsdevel
The mm-of-the-moment snapshot 2011-01-25-15-47 has been uploaded to
http://userweb.kernel.org/~akpm/mmotm/
and will soon be available at
git://zen-kernel.org/kernel/mmotm.git
It contains the following patches against 2.6.38-rc2:
origin.patch
thp-fix-paravirt-x86-32bit-nopae.patch
mm-pgtable-genericc-fix-config_swap=n-build.patch
leds-leds-pwm-return-proper-error-if-pwm_request-failed.patch
langwell_gpio-modify-eoi-handling-following-change-of-kernel-irq-subsystem.patch
parport-make-lockdep-happy-with-waitlist_lock.patch
pps-ktimer-remove-noisy-message.patch
pps-claim-parallel-port-exclusively.patch
mm-fix-deferred-congestion-timeout-if-preferred-zone-is-not-allowed.patch
mm-clear-pages_scanned-only-if-draining-a-pcp-adds-pages-to-the-buddy-allocator.patch
mm-memcontrolc-fix-uninitialized-variable-use-in-mem_cgroup_move_parent.patch
mm-compaction-dont-depend-on-hugetlb_page.patch
mm-migration-clarify-migrate_pages-comment.patch
memcg-fix-account-leak-at-failure-of-memsw-acconting.patch
memcg-bugfix-check-mem_cgroup_disabled-at-split-fixup.patch
memcg-fix-race-at-move_parent-around-compound_order.patch
atmel_tc-tcb_clksrc-fix-init-sequence.patch
radix_tree-radix_tree_gang_lookup_tag_slot-may-not-return-forever.patch
squashfs-fix-use-of-uninitialised-variable-in-zlib-xz-decompressors.patch
change-acquire-release_console_sem-to-console_lock-unlock.patch
mm-numa-aware-alloc_task_struct_node.patch
mm-numa-aware-alloc_thread_info_node.patch
kthread-numa-aware-kthread_create_on_cpu.patch
kthread-use-kthread_create_on_cpu.patch
linux-next.patch
linux-next-git-rejects.patch
next-remove-localversion.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
backlight-new-driver-for-the-adp8870-backlight-devices.patch
mm-vmap-area-cache.patch
loop-queue_lock-null-pointer-derefence-in-blk_throtl_exit-v3.patch
drivers-media-video-tlg2300-pd-videoc-fix-double-mutex_unlock-in-pd_vidioc_s_fmt.patch
scsi-include-linux-scatterlisth-to-pick-up-arch_has_sg_chain.patch
acerhdf-add-support-for-aspire-1410-bios-v13314.patch
x86-numa-add-error-handling-for-bad-cpu-to-node-mappings.patch
msm-timer-migrate-to-timer-based-__delay.patch
audit-always-follow-va_copy-with-va_end.patch
fs-btrfs-inodec-eliminate-memory-leak.patch
btrfs-dont-dereference-extent_mapping-if-null.patch
cpufreq-fix-ondemand-governor-powersave_bias-execution-time-misuse.patch
drivers-dma-ipu-ipu_irqc-irq_data-conversion.patch
debugfs-remove-module_exit.patch
drivers-gpu-drm-radeon-atomc-fix-warning.patch
cyber2000fb-avoid-palette-corruption-at-higher-clocks.patch
leds-convert-bd2802-driver-to-dev_pm_ops.patch
leds-convert-bd2802-driver-to-dev_pm_ops-fix.patch
leds-add-driver-for-lm3530-als.patch
leds-add-driver-for-lm3530-als-update.patch
leds-route-kbd-leds-through-the-generic-leds-layer.patch
mips-enable-arch_dma_addr_t_64bit-with-highmem-64bit_phys_addr-64bit.patch
backlight-add-backlight-type.patch
backlight-add-backlight-type-fix.patch
backlight-add-backlight-type-fix-fix.patch
i915-add-native-backlight-control.patch
radeon-expose-backlight-class-device-for-legacy-lvds-encoder.patch
radeon-expose-backlight-class-device-for-legacy-lvds-encoder-update.patch
nouveau-change-the-backlight-parent-device-to-the-connector-not-the-pci-dev.patch
acpi-tie-acpi-backlight-devices-to-pci-devices-if-possible.patch
mbp_nvidia_bl-remove-dmi-dependency.patch
mbp_nvidia_bl-check-that-the-backlight-control-functions.patch
mbp_nvidia_bl-rename-to-apple_bl.patch
btusb-patch-add_apple_macbookpro62.patch
tty-serial-fix-apbuart-build.patch
drivers-message-fusion-mptsasc-fix-warning.patch
scsi-fix-a-header-to-include-linux-typesh.patch
drivers-block-makefile-replace-the-use-of-module-objs-with-module-y.patch
drivers-block-aoe-makefile-replace-the-use-of-module-objs-with-module-y.patch
cciss-make-cciss_revalidate-not-loop-through-ciss_max_luns-volumes-unnecessarily.patch
loop-queue_lock-null-pointer-derefence-in-blk_throtl_exit.patch
drbd-fix-warning.patch
usb-yurex-recognize-generalkeys-wireless-presenter-as-generic-hid.patch
vfs-remove-a-warning-on-open_fmode.patch
vfs-add-__fmode_exec.patch
fs-make-block-fiemap-mapping-length-at-least-blocksize-long.patch
n_hdlc-fix-read-and-write-locking.patch
mm.patch
oom-suppress-nodes-that-are-not-allowed-from-meminfo-on-oom-kill.patch
oom-suppress-show_mem-for-many-nodes-in-irq-context-on-page-alloc-failure.patch
oom-suppress-nodes-that-are-not-allowed-from-meminfo-on-page-alloc-failure.patch
mm-notifier_from_errno-cleanup.patch
mm-add-replace_page_cache_page-function.patch
frv-duplicate-output_buffer-of-e03.patch
frv-duplicate-output_buffer-of-e03-checkpatch-fixes.patch
hpet-factor-timer-allocate-from-open.patch
arch-alpha-include-asm-ioh-s-extern-inline-static-inline.patch
uml-kernels-on-i386x86_64-produce-bad-coredumps.patch
add-the-common-dma_addr_t-typedef-to-include-linux-typesh.patch
bh1780gli-convert-to-dev-pm-ops.patch
drivers-misc-bmp085c-free-initmem-memory.patch
smp-move-smp-setup-functions-to-kernel-smpc.patch
llist-add-kconfig-option-arch_have_nmi_safe_cmpxchg.patch
llist-lib-add-lock-less-null-terminated-single-list.patch
llist-irq_work-use-llist-in-irq_work.patch
llist-net-rds-replace-xlist-in-net-rds-xlisth-with-llist.patch
net-convert-%p-usage-to-%pk.patch
vsprintf-neaten-%pk-kptr_restrict-save-a-bit-of-code-space.patch
console-allow-to-retain-boot-console-via-boot-option-keep_bootcon.patch
console-prevent-registered-consoles-from-dumping-old-kernel-message-over-again.patch
vfs-ignore-error-on-forced-remount.patch
vfs-keep-list-of-mounts-for-each-superblock.patch
vfs-protect-remounting-superblock-read-only.patch
vfs-fs_may_remount_ro-turn-unnecessary-check-into-a-warn_on.patch
fs-ioctlc-remove-unnecessary-variable.patch
get_maintainerpl-add-support-to-match-arbitrary-text.patch
sigma-firmware-loader-for-analog-devices-sigmastudio.patch
sigma-firmware-loader-for-analog-devices-sigmastudio-v2.patch
drivers-mmc-host-omapc-use-resource_size.patch
drivers-mmc-host-omap_hsmmcc-use-resource_size.patch
select-remove-unused-max_select_seconds.patch
epoll-move-ready-event-check-into-proper-inline.patch
epoll-fix-compiler-warning-and-optimize-the-non-blocking-path.patch
binfmt_elf-quiet-gcc-46-set-but-not-used-warning-in-load_elf_binary.patch
lib-hexdumpc-make-hex2bin-return-the-updated-src-address.patch
fs-binfmt_miscc-use-kernels-hex_to_bin-method.patch
fs-binfmt_miscc-use-kernels-hex_to_bin-method-fix.patch
fs-binfmt_miscc-use-kernels-hex_to_bin-method-fix-fix.patch
init-return-proper-error-code-in-do_mounts_rd.patch
rtc-add-support-for-the-rtc-in-via-vt8500-and-compatibles.patch
rtc-add-real-time-clock-driver-for-nvidia-tegra.patch
jbd-remove-dependency-on-__gfp_nofail.patch
exec_domain-establish-a-linux32-domain-on-config_compat-systems.patch
rapidio-add-new-sysfs-attributes.patch
rapidio-add-rapidio-documentation.patch
fs-execc-provide-the-correct-process-pid-to-the-pipe-helper.patch
kernel-gcov-makefile-use-proper-ccflag-flag-in-makefile.patch
remove-dma64_addr_t.patch
adfs-fix-e-f-dir-size-2048-crashing-kernel.patch
adfs-improve-timestamp-precision.patch
adfs-add-hexadecimal-filetype-suffix-option.patch
adfs-remove-the-big-kernel-lock.patch
scatterlist-new-helper-functions.patch
memstick-add-driver-for-ricoh-r5c592-card-reader.patch
memstick-add-support-for-legacy-memorysticks.patch
memstick-add-support-for-legacy-memorysticks-update.patch
memstick-add-alex-dubov-to-maintainers-of-the-memstick-core.patch
kvm-stop-including-asm-generic-bitops-leh-directly.patch
rds-stop-including-asm-generic-bitops-leh-directly.patch
bitops-merge-little-and-big-endian-definisions-in-asm-generic-bitops-leh.patch
asm-generic-rename-generic-little-endian-bitops-functions.patch
asm-generic-change-little-endian-bitops-to-take-any-pointer-types.patch
powerpc-introduce-little-endian-bitops.patch
s390-introduce-little-endian-bitops.patch
arm-introduce-little-endian-bitops.patch
m68k-introduce-little-endian-bitops.patch
bitops-introduce-config_generic_find_bit_le.patch
m68knommu-introduce-little-endian-bitops.patch
bitops-introduce-little-endian-bitops-for-most-architectures.patch
asm-generic-use-little-endian-bitops.patch
kvm-use-little-endian-bitops.patch
rds-use-little-endian-bitops.patch
ext3-use-little-endian-bitops.patch
ext4-use-little-endian-bitops.patch
ocfs2-use-little-endian-bitops.patch
nilfs2-use-little-endian-bitops.patch
reiserfs-use-little-endian-bitops.patch
udf-use-little-endian-bitops.patch
ufs-use-little-endian-bitops.patch
md-use-little-endian-bitops.patch
dm-use-little-endian-bitops.patch
bitops-remove-ext2-non-atomic-bitops-from-asm-bitopsh.patch
m68k-remove-inline-asm-from-minix_find_first_zero_bit.patch
bitops-remove-minix-bitops-from-asm-bitopsh.patch
make-sure-nobodys-leaking-resources.patch
journal_add_journal_head-debug.patch
releasing-resources-with-children.patch
make-frame_pointer-default=y.patch
mutex-subsystem-synchro-test-module.patch
mutex-subsystem-synchro-test-module-add-missing-header-file.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
add-debugging-aid-for-memory-initialisation-problems.patch
workaround-for-a-pci-restoring-bug.patch
prio_tree-debugging-patch.patch
single_open-seq_release-leak-diagnostics.patch
add-a-refcount-check-in-dput.patch
memblock-add-input-size-checking-to-memblock_find_region.patch
memblock-add-input-size-checking-to-memblock_find_region-fix.patch
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: mmotm 2011-01-25-15-47 uploaded
2011-01-25 23:48 mmotm 2011-01-25-15-47 uploaded akpm
@ 2011-01-26 8:45 ` CAI Qian
2011-01-26 13:52 ` Andrea Arcangeli
2011-01-26 10:20 ` [patch] epoll-fix-compiler-warning-and-optimize-the-non-blocking-path-fix Johannes Weiner
1 sibling, 1 reply; 7+ messages in thread
From: CAI Qian @ 2011-01-26 8:45 UTC (permalink / raw)
To: Andrea Arcangeli; +Cc: linux-mm
Andrea,
khugepaged hung during swapping there.
INFO: task khugepaged:276 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
khugepaged D ffff880fa0fd4610 0 276 2 0x00000000
ffff880fa07cfcc0 0000000000000046 ffff88201ffdac00 0000000000000000
0000000000014d40 ffff880fa0fd4080 ffff880fa0fd4610 ffff880fa07cffd8
ffff880fa0fd4618 0000000000014d40 ffff880fa07ce010 0000000000014d40
Call Trace:
[<ffffffff814afeb5>] rwsem_down_failed_common+0xb5/0x140
[<ffffffff814aff53>] rwsem_down_write_failed+0x13/0x20
[<ffffffff812301a3>] call_rwsem_down_write_failed+0x13/0x20
[<ffffffff814af4d2>] ? down_write+0x32/0x40
[<ffffffff81146b4d>] khugepaged+0x8ad/0x1300
[<ffffffff8100a6f0>] ? __switch_to+0xd0/0x320
[<ffffffff811462a0>] ? khugepaged+0x0/0x1300
[<ffffffff810830f0>] ? autoremove_wake_function+0x0/0x40
[<ffffffff811462a0>] ? khugepaged+0x0/0x1300
[<ffffffff81082a56>] kthread+0x96/0xa0
[<ffffffff8100cdc4>] kernel_thread_helper+0x4/0x10
[<ffffffff810829c0>] ? kthread+0x0/0xa0
[<ffffffff8100cdc0>] ? kernel_thread_helper+0x0/0x10
INFO: task pgrep:6039 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
pgrep D ffff887f606f1ab0 0 6039 6038 0x00000080
ffff8821e39c1ce0 0000000000000082 0000000000000246 0000000000000000
0000000000014d40 ffff887f606f1520 ffff887f606f1ab0 ffff8821e39c1fd8
ffff887f606f1ab8 0000000000014d40 ffff8821e39c0010 0000000000014d40
Call Trace:
[<ffffffff814afeb5>] rwsem_down_failed_common+0xb5/0x140
[<ffffffff814aff75>] rwsem_down_read_failed+0x15/0x17
[<ffffffff81230174>] call_rwsem_down_read_failed+0x14/0x30
[<ffffffff814af504>] ? down_read+0x24/0x30
[<ffffffff8111f4dc>] access_process_vm+0x4c/0x200
[<ffffffff8113f3fe>] ? fallback_alloc+0x14e/0x270
[<ffffffff811afa4d>] proc_pid_cmdline+0x6d/0x120
[<ffffffff81137eba>] ? alloc_pages_current+0x9a/0x100
[<ffffffff811b037d>] proc_info_read+0xad/0xf0
[<ffffffff81154315>] vfs_read+0xc5/0x190
[<ffffffff811544e1>] sys_read+0x51/0x90
[<ffffffff8100bf82>] system_call_fastpath+0x16/0x1b
----- Original Message -----
> The mm-of-the-moment snapshot 2011-01-25-15-47 has been uploaded to
>
> http://userweb.kernel.org/~akpm/mmotm/
>
> and will soon be available at
>
> git://zen-kernel.org/kernel/mmotm.git
>
> It contains the following patches against 2.6.38-rc2:
>
> origin.patch
> thp-fix-paravirt-x86-32bit-nopae.patch
> mm-pgtable-genericc-fix-config_swap=n-build.patch
> leds-leds-pwm-return-proper-error-if-pwm_request-failed.patch
> langwell_gpio-modify-eoi-handling-following-change-of-kernel-irq-subsystem.patch
> parport-make-lockdep-happy-with-waitlist_lock.patch
> pps-ktimer-remove-noisy-message.patch
> pps-claim-parallel-port-exclusively.patch
> mm-fix-deferred-congestion-timeout-if-preferred-zone-is-not-allowed.patch
> mm-clear-pages_scanned-only-if-draining-a-pcp-adds-pages-to-the-buddy-allocator.patch
> mm-memcontrolc-fix-uninitialized-variable-use-in-mem_cgroup_move_parent.patch
> mm-compaction-dont-depend-on-hugetlb_page.patch
> mm-migration-clarify-migrate_pages-comment.patch
> memcg-fix-account-leak-at-failure-of-memsw-acconting.patch
> memcg-bugfix-check-mem_cgroup_disabled-at-split-fixup.patch
> memcg-fix-race-at-move_parent-around-compound_order.patch
> atmel_tc-tcb_clksrc-fix-init-sequence.patch
> radix_tree-radix_tree_gang_lookup_tag_slot-may-not-return-forever.patch
> squashfs-fix-use-of-uninitialised-variable-in-zlib-xz-decompressors.patch
> change-acquire-release_console_sem-to-console_lock-unlock.patch
> mm-numa-aware-alloc_task_struct_node.patch
> mm-numa-aware-alloc_thread_info_node.patch
> kthread-numa-aware-kthread_create_on_cpu.patch
> kthread-use-kthread_create_on_cpu.patch
> linux-next.patch
> linux-next-git-rejects.patch
> next-remove-localversion.patch
> i-need-old-gcc.patch
> arch-alpha-kernel-systblss-remove-debug-check.patch
> backlight-new-driver-for-the-adp8870-backlight-devices.patch
> mm-vmap-area-cache.patch
> loop-queue_lock-null-pointer-derefence-in-blk_throtl_exit-v3.patch
> drivers-media-video-tlg2300-pd-videoc-fix-double-mutex_unlock-in-pd_vidioc_s_fmt.patch
> scsi-include-linux-scatterlisth-to-pick-up-arch_has_sg_chain.patch
> acerhdf-add-support-for-aspire-1410-bios-v13314.patch
> x86-numa-add-error-handling-for-bad-cpu-to-node-mappings.patch
> msm-timer-migrate-to-timer-based-__delay.patch
> audit-always-follow-va_copy-with-va_end.patch
> fs-btrfs-inodec-eliminate-memory-leak.patch
> btrfs-dont-dereference-extent_mapping-if-null.patch
> cpufreq-fix-ondemand-governor-powersave_bias-execution-time-misuse.patch
> drivers-dma-ipu-ipu_irqc-irq_data-conversion.patch
> debugfs-remove-module_exit.patch
> drivers-gpu-drm-radeon-atomc-fix-warning.patch
> cyber2000fb-avoid-palette-corruption-at-higher-clocks.patch
> leds-convert-bd2802-driver-to-dev_pm_ops.patch
> leds-convert-bd2802-driver-to-dev_pm_ops-fix.patch
> leds-add-driver-for-lm3530-als.patch
> leds-add-driver-for-lm3530-als-update.patch
> leds-route-kbd-leds-through-the-generic-leds-layer.patch
> mips-enable-arch_dma_addr_t_64bit-with-highmem-64bit_phys_addr-64bit.patch
> backlight-add-backlight-type.patch
> backlight-add-backlight-type-fix.patch
> backlight-add-backlight-type-fix-fix.patch
> i915-add-native-backlight-control.patch
> radeon-expose-backlight-class-device-for-legacy-lvds-encoder.patch
> radeon-expose-backlight-class-device-for-legacy-lvds-encoder-update.patch
> nouveau-change-the-backlight-parent-device-to-the-connector-not-the-pci-dev.patch
> acpi-tie-acpi-backlight-devices-to-pci-devices-if-possible.patch
> mbp_nvidia_bl-remove-dmi-dependency.patch
> mbp_nvidia_bl-check-that-the-backlight-control-functions.patch
> mbp_nvidia_bl-rename-to-apple_bl.patch
> btusb-patch-add_apple_macbookpro62.patch
> tty-serial-fix-apbuart-build.patch
> drivers-message-fusion-mptsasc-fix-warning.patch
> scsi-fix-a-header-to-include-linux-typesh.patch
> drivers-block-makefile-replace-the-use-of-module-objs-with-module-y.patch
> drivers-block-aoe-makefile-replace-the-use-of-module-objs-with-module-y.patch
> cciss-make-cciss_revalidate-not-loop-through-ciss_max_luns-volumes-unnecessarily.patch
> loop-queue_lock-null-pointer-derefence-in-blk_throtl_exit.patch
> drbd-fix-warning.patch
> usb-yurex-recognize-generalkeys-wireless-presenter-as-generic-hid.patch
> vfs-remove-a-warning-on-open_fmode.patch
> vfs-add-__fmode_exec.patch
> fs-make-block-fiemap-mapping-length-at-least-blocksize-long.patch
> n_hdlc-fix-read-and-write-locking.patch
> mm.patch
> oom-suppress-nodes-that-are-not-allowed-from-meminfo-on-oom-kill.patch
> oom-suppress-show_mem-for-many-nodes-in-irq-context-on-page-alloc-failure.patch
> oom-suppress-nodes-that-are-not-allowed-from-meminfo-on-page-alloc-failure.patch
> mm-notifier_from_errno-cleanup.patch
> mm-add-replace_page_cache_page-function.patch
> frv-duplicate-output_buffer-of-e03.patch
> frv-duplicate-output_buffer-of-e03-checkpatch-fixes.patch
> hpet-factor-timer-allocate-from-open.patch
> arch-alpha-include-asm-ioh-s-extern-inline-static-inline.patch
> uml-kernels-on-i386x86_64-produce-bad-coredumps.patch
> add-the-common-dma_addr_t-typedef-to-include-linux-typesh.patch
> bh1780gli-convert-to-dev-pm-ops.patch
> drivers-misc-bmp085c-free-initmem-memory.patch
> smp-move-smp-setup-functions-to-kernel-smpc.patch
> llist-add-kconfig-option-arch_have_nmi_safe_cmpxchg.patch
> llist-lib-add-lock-less-null-terminated-single-list.patch
> llist-irq_work-use-llist-in-irq_work.patch
> llist-net-rds-replace-xlist-in-net-rds-xlisth-with-llist.patch
> net-convert-%p-usage-to-%pk.patch
> vsprintf-neaten-%pk-kptr_restrict-save-a-bit-of-code-space.patch
> console-allow-to-retain-boot-console-via-boot-option-keep_bootcon.patch
> console-prevent-registered-consoles-from-dumping-old-kernel-message-over-again.patch
> vfs-ignore-error-on-forced-remount.patch
> vfs-keep-list-of-mounts-for-each-superblock.patch
> vfs-protect-remounting-superblock-read-only.patch
> vfs-fs_may_remount_ro-turn-unnecessary-check-into-a-warn_on.patch
> fs-ioctlc-remove-unnecessary-variable.patch
> get_maintainerpl-add-support-to-match-arbitrary-text.patch
> sigma-firmware-loader-for-analog-devices-sigmastudio.patch
> sigma-firmware-loader-for-analog-devices-sigmastudio-v2.patch
> drivers-mmc-host-omapc-use-resource_size.patch
> drivers-mmc-host-omap_hsmmcc-use-resource_size.patch
> select-remove-unused-max_select_seconds.patch
> epoll-move-ready-event-check-into-proper-inline.patch
> epoll-fix-compiler-warning-and-optimize-the-non-blocking-path.patch
> binfmt_elf-quiet-gcc-46-set-but-not-used-warning-in-load_elf_binary.patch
> lib-hexdumpc-make-hex2bin-return-the-updated-src-address.patch
> fs-binfmt_miscc-use-kernels-hex_to_bin-method.patch
> fs-binfmt_miscc-use-kernels-hex_to_bin-method-fix.patch
> fs-binfmt_miscc-use-kernels-hex_to_bin-method-fix-fix.patch
> init-return-proper-error-code-in-do_mounts_rd.patch
> rtc-add-support-for-the-rtc-in-via-vt8500-and-compatibles.patch
> rtc-add-real-time-clock-driver-for-nvidia-tegra.patch
> jbd-remove-dependency-on-__gfp_nofail.patch
> exec_domain-establish-a-linux32-domain-on-config_compat-systems.patch
> rapidio-add-new-sysfs-attributes.patch
> rapidio-add-rapidio-documentation.patch
> fs-execc-provide-the-correct-process-pid-to-the-pipe-helper.patch
> kernel-gcov-makefile-use-proper-ccflag-flag-in-makefile.patch
> remove-dma64_addr_t.patch
> adfs-fix-e-f-dir-size-2048-crashing-kernel.patch
> adfs-improve-timestamp-precision.patch
> adfs-add-hexadecimal-filetype-suffix-option.patch
> adfs-remove-the-big-kernel-lock.patch
> scatterlist-new-helper-functions.patch
> memstick-add-driver-for-ricoh-r5c592-card-reader.patch
> memstick-add-support-for-legacy-memorysticks.patch
> memstick-add-support-for-legacy-memorysticks-update.patch
> memstick-add-alex-dubov-to-maintainers-of-the-memstick-core.patch
> kvm-stop-including-asm-generic-bitops-leh-directly.patch
> rds-stop-including-asm-generic-bitops-leh-directly.patch
> bitops-merge-little-and-big-endian-definisions-in-asm-generic-bitops-leh.patch
> asm-generic-rename-generic-little-endian-bitops-functions.patch
> asm-generic-change-little-endian-bitops-to-take-any-pointer-types.patch
> powerpc-introduce-little-endian-bitops.patch
> s390-introduce-little-endian-bitops.patch
> arm-introduce-little-endian-bitops.patch
> m68k-introduce-little-endian-bitops.patch
> bitops-introduce-config_generic_find_bit_le.patch
> m68knommu-introduce-little-endian-bitops.patch
> bitops-introduce-little-endian-bitops-for-most-architectures.patch
> asm-generic-use-little-endian-bitops.patch
> kvm-use-little-endian-bitops.patch
> rds-use-little-endian-bitops.patch
> ext3-use-little-endian-bitops.patch
> ext4-use-little-endian-bitops.patch
> ocfs2-use-little-endian-bitops.patch
> nilfs2-use-little-endian-bitops.patch
> reiserfs-use-little-endian-bitops.patch
> udf-use-little-endian-bitops.patch
> ufs-use-little-endian-bitops.patch
> md-use-little-endian-bitops.patch
> dm-use-little-endian-bitops.patch
> bitops-remove-ext2-non-atomic-bitops-from-asm-bitopsh.patch
> m68k-remove-inline-asm-from-minix_find_first_zero_bit.patch
> bitops-remove-minix-bitops-from-asm-bitopsh.patch
> make-sure-nobodys-leaking-resources.patch
> journal_add_journal_head-debug.patch
> releasing-resources-with-children.patch
> make-frame_pointer-default=y.patch
> mutex-subsystem-synchro-test-module.patch
> mutex-subsystem-synchro-test-module-add-missing-header-file.patch
> slab-leaks3-default-y.patch
> put_bh-debug.patch
> add-debugging-aid-for-memory-initialisation-problems.patch
> workaround-for-a-pci-restoring-bug.patch
> prio_tree-debugging-patch.patch
> single_open-seq_release-leak-diagnostics.patch
> add-a-refcount-check-in-dput.patch
> memblock-add-input-size-checking-to-memblock_find_region.patch
> memblock-add-input-size-checking-to-memblock_find_region-fix.patch
> --
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^ permalink raw reply [flat|nested] 7+ messages in thread
* [patch] epoll-fix-compiler-warning-and-optimize-the-non-blocking-path-fix
2011-01-25 23:48 mmotm 2011-01-25-15-47 uploaded akpm
2011-01-26 8:45 ` CAI Qian
@ 2011-01-26 10:20 ` Johannes Weiner
2011-01-26 15:05 ` Davide Libenzi
1 sibling, 1 reply; 7+ messages in thread
From: Johannes Weiner @ 2011-01-26 10:20 UTC (permalink / raw)
To: akpm
Cc: shawn.bohrer, davidel, linux-mm, linux-fsdevel, mm-commits,
linux-kernel
The non-blocking ep_poll path optimization introduced skipping over
the return value setup.
Initialize it properly, my userspace gets upset by epoll_wait()
returning random things.
In addition, remove the reinitialization at the fetch_events label,
the return value is garuanteed to be zero when execution reaches
there.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Shawn Bohrer <shawn.bohrer@gmail.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
---
fs/eventpoll.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index f7cb6cb..afe4238 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1147,7 +1147,7 @@ static int ep_send_events(struct eventpoll *ep,
static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
int maxevents, long timeout)
{
- int res, eavail, timed_out = 0;
+ int res = 0, eavail, timed_out = 0;
unsigned long flags;
long slack = 0;
wait_queue_t wait;
@@ -1173,7 +1173,6 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
fetch_events:
spin_lock_irqsave(&ep->lock, flags);
- res = 0;
if (!ep_events_available(ep)) {
/*
* We don't have any available event to return to the caller.
--
1.7.3.5
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^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: mmotm 2011-01-25-15-47 uploaded
2011-01-26 8:45 ` CAI Qian
@ 2011-01-26 13:52 ` Andrea Arcangeli
2011-01-28 6:44 ` CAI Qian
0 siblings, 1 reply; 7+ messages in thread
From: Andrea Arcangeli @ 2011-01-26 13:52 UTC (permalink / raw)
To: CAI Qian; +Cc: linux-mm
Hi Qian,
On Wed, Jan 26, 2011 at 03:45:55AM -0500, CAI Qian wrote:
> Andrea,
>
> khugepaged hung during swapping there.
>
> INFO: task khugepaged:276 blocked for more than 120 seconds.
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> khugepaged D ffff880fa0fd4610 0 276 2 0x00000000
> ffff880fa07cfcc0 0000000000000046 ffff88201ffdac00 0000000000000000
> 0000000000014d40 ffff880fa0fd4080 ffff880fa0fd4610 ffff880fa07cffd8
> ffff880fa0fd4618 0000000000014d40 ffff880fa07ce010 0000000000014d40
> Call Trace:
> [<ffffffff814afeb5>] rwsem_down_failed_common+0xb5/0x140
> [<ffffffff814aff53>] rwsem_down_write_failed+0x13/0x20
> [<ffffffff812301a3>] call_rwsem_down_write_failed+0x13/0x20
> [<ffffffff814af4d2>] ? down_write+0x32/0x40
> [<ffffffff81146b4d>] khugepaged+0x8ad/0x1300
> [<ffffffff8100a6f0>] ? __switch_to+0xd0/0x320
> [<ffffffff811462a0>] ? khugepaged+0x0/0x1300
> [<ffffffff810830f0>] ? autoremove_wake_function+0x0/0x40
> [<ffffffff811462a0>] ? khugepaged+0x0/0x1300
> [<ffffffff81082a56>] kthread+0x96/0xa0
> [<ffffffff8100cdc4>] kernel_thread_helper+0x4/0x10
> [<ffffffff810829c0>] ? kthread+0x0/0xa0
> [<ffffffff8100cdc0>] ? kernel_thread_helper+0x0/0x10
> INFO: task pgrep:6039 blocked for more than 120 seconds.
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> pgrep D ffff887f606f1ab0 0 6039 6038 0x00000080
> ffff8821e39c1ce0 0000000000000082 0000000000000246 0000000000000000
> 0000000000014d40 ffff887f606f1520 ffff887f606f1ab0 ffff8821e39c1fd8
> ffff887f606f1ab8 0000000000014d40 ffff8821e39c0010 0000000000014d40
> Call Trace:
> [<ffffffff814afeb5>] rwsem_down_failed_common+0xb5/0x140
> [<ffffffff814aff75>] rwsem_down_read_failed+0x15/0x17
> [<ffffffff81230174>] call_rwsem_down_read_failed+0x14/0x30
> [<ffffffff814af504>] ? down_read+0x24/0x30
> [<ffffffff8111f4dc>] access_process_vm+0x4c/0x200
> [<ffffffff8113f3fe>] ? fallback_alloc+0x14e/0x270
> [<ffffffff811afa4d>] proc_pid_cmdline+0x6d/0x120
> [<ffffffff81137eba>] ? alloc_pages_current+0x9a/0x100
> [<ffffffff811b037d>] proc_info_read+0xad/0xf0
> [<ffffffff81154315>] vfs_read+0xc5/0x190
> [<ffffffff811544e1>] sys_read+0x51/0x90
> [<ffffffff8100bf82>] system_call_fastpath+0x16/0x1b
pgrep hung too, it's not just khugepaged hanging and it's not obvious
for now that khugepaged was guilty of forgetting an unlock, could be
the process deadlocked somewhere with the mmap_sem hold. Can you press
SYSRQ+T? Hopefully that will show the holder. Also is CONFIG_NUMA=y/n?
Thanks,
Andrea
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [patch] epoll-fix-compiler-warning-and-optimize-the-non-blocking-path-fix
2011-01-26 10:20 ` [patch] epoll-fix-compiler-warning-and-optimize-the-non-blocking-path-fix Johannes Weiner
@ 2011-01-26 15:05 ` Davide Libenzi
0 siblings, 0 replies; 7+ messages in thread
From: Davide Libenzi @ 2011-01-26 15:05 UTC (permalink / raw)
To: Johannes Weiner
Cc: Andrew Morton, shawn.bohrer, linux-mm, linux-fsdevel, mm-commits,
Linux Kernel Mailing List
On Wed, 26 Jan 2011, Johannes Weiner wrote:
> The non-blocking ep_poll path optimization introduced skipping over
> the return value setup.
>
> Initialize it properly, my userspace gets upset by epoll_wait()
> returning random things.
>
> In addition, remove the reinitialization at the fetch_events label,
> the return value is garuanteed to be zero when execution reaches
> there.
>
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> Cc: Shawn Bohrer <shawn.bohrer@gmail.com>
> Cc: Davide Libenzi <davidel@xmailserver.org>
Thank you for posting it. Obvious ACK.
> ---
> fs/eventpoll.c | 3 +--
> 1 files changed, 1 insertions(+), 2 deletions(-)
>
> diff --git a/fs/eventpoll.c b/fs/eventpoll.c
> index f7cb6cb..afe4238 100644
> --- a/fs/eventpoll.c
> +++ b/fs/eventpoll.c
> @@ -1147,7 +1147,7 @@ static int ep_send_events(struct eventpoll *ep,
> static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
> int maxevents, long timeout)
> {
> - int res, eavail, timed_out = 0;
> + int res = 0, eavail, timed_out = 0;
> unsigned long flags;
> long slack = 0;
> wait_queue_t wait;
> @@ -1173,7 +1173,6 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
> fetch_events:
> spin_lock_irqsave(&ep->lock, flags);
>
> - res = 0;
> if (!ep_events_available(ep)) {
> /*
> * We don't have any available event to return to the caller.
> --
> 1.7.3.5
>
> --
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: mmotm 2011-01-25-15-47 uploaded
2011-01-26 13:52 ` Andrea Arcangeli
@ 2011-01-28 6:44 ` CAI Qian
2011-01-28 16:50 ` pgd_lock must be taken with irqs enabled Andrea Arcangeli
0 siblings, 1 reply; 7+ messages in thread
From: CAI Qian @ 2011-01-28 6:44 UTC (permalink / raw)
To: Andrea Arcangeli; +Cc: linux-mm
----- Original Message -----
> Hi Qian,
>
> On Wed, Jan 26, 2011 at 03:45:55AM -0500, CAI Qian wrote:
> > Andrea,
> >
> > khugepaged hung during swapping there.
> >
> > INFO: task khugepaged:276 blocked for more than 120 seconds.
> > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
> > message.
> > khugepaged D ffff880fa0fd4610 0 276 2 0x00000000
> > ffff880fa07cfcc0 0000000000000046 ffff88201ffdac00 0000000000000000
> > 0000000000014d40 ffff880fa0fd4080 ffff880fa0fd4610 ffff880fa07cffd8
> > ffff880fa0fd4618 0000000000014d40 ffff880fa07ce010 0000000000014d40
> > Call Trace:
> > [<ffffffff814afeb5>] rwsem_down_failed_common+0xb5/0x140
> > [<ffffffff814aff53>] rwsem_down_write_failed+0x13/0x20
> > [<ffffffff812301a3>] call_rwsem_down_write_failed+0x13/0x20
> > [<ffffffff814af4d2>] ? down_write+0x32/0x40
> > [<ffffffff81146b4d>] khugepaged+0x8ad/0x1300
> > [<ffffffff8100a6f0>] ? __switch_to+0xd0/0x320
> > [<ffffffff811462a0>] ? khugepaged+0x0/0x1300
> > [<ffffffff810830f0>] ? autoremove_wake_function+0x0/0x40
> > [<ffffffff811462a0>] ? khugepaged+0x0/0x1300
> > [<ffffffff81082a56>] kthread+0x96/0xa0
> > [<ffffffff8100cdc4>] kernel_thread_helper+0x4/0x10
> > [<ffffffff810829c0>] ? kthread+0x0/0xa0
> > [<ffffffff8100cdc0>] ? kernel_thread_helper+0x0/0x10
> > INFO: task pgrep:6039 blocked for more than 120 seconds.
> > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
> > message.
> > pgrep D ffff887f606f1ab0 0 6039 6038 0x00000080
> > ffff8821e39c1ce0 0000000000000082 0000000000000246 0000000000000000
> > 0000000000014d40 ffff887f606f1520 ffff887f606f1ab0 ffff8821e39c1fd8
> > ffff887f606f1ab8 0000000000014d40 ffff8821e39c0010 0000000000014d40
> > Call Trace:
> > [<ffffffff814afeb5>] rwsem_down_failed_common+0xb5/0x140
> > [<ffffffff814aff75>] rwsem_down_read_failed+0x15/0x17
> > [<ffffffff81230174>] call_rwsem_down_read_failed+0x14/0x30
> > [<ffffffff814af504>] ? down_read+0x24/0x30
> > [<ffffffff8111f4dc>] access_process_vm+0x4c/0x200
> > [<ffffffff8113f3fe>] ? fallback_alloc+0x14e/0x270
> > [<ffffffff811afa4d>] proc_pid_cmdline+0x6d/0x120
> > [<ffffffff81137eba>] ? alloc_pages_current+0x9a/0x100
> > [<ffffffff811b037d>] proc_info_read+0xad/0xf0
> > [<ffffffff81154315>] vfs_read+0xc5/0x190
> > [<ffffffff811544e1>] sys_read+0x51/0x90
> > [<ffffffff8100bf82>] system_call_fastpath+0x16/0x1b
>
> pgrep hung too, it's not just khugepaged hanging and it's not obvious
> for now that khugepaged was guilty of forgetting an unlock, could be
> the process deadlocked somewhere with the mmap_sem hold. Can you press
> SYSRQ+T? Hopefully that will show the holder. Also is CONFIG_NUMA=y/n?
Unfortunately, SYSRQ+T was not working. CONFIG_NUMA=y and this is an
NUMA system as well.
CAI Qian
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^ permalink raw reply [flat|nested] 7+ messages in thread
* pgd_lock must be taken with irqs enabled
2011-01-28 6:44 ` CAI Qian
@ 2011-01-28 16:50 ` Andrea Arcangeli
0 siblings, 0 replies; 7+ messages in thread
From: Andrea Arcangeli @ 2011-01-28 16:50 UTC (permalink / raw)
To: CAI Qian; +Cc: linux-mm
On Fri, Jan 28, 2011 at 01:44:01AM -0500, CAI Qian wrote:
> > > INFO: task pgrep:6039 blocked for more than 120 seconds.
> > > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
> > > message.
> > > pgrep D ffff887f606f1ab0 0 6039 6038 0x00000080
> > > ffff8821e39c1ce0 0000000000000082 0000000000000246 0000000000000000
> > > 0000000000014d40 ffff887f606f1520 ffff887f606f1ab0 ffff8821e39c1fd8
> > > ffff887f606f1ab8 0000000000014d40 ffff8821e39c0010 0000000000014d40
> > > Call Trace:
> > > [<ffffffff814afeb5>] rwsem_down_failed_common+0xb5/0x140
> > > [<ffffffff814aff75>] rwsem_down_read_failed+0x15/0x17
> > > [<ffffffff81230174>] call_rwsem_down_read_failed+0x14/0x30
> > > [<ffffffff814af504>] ? down_read+0x24/0x30
> > > [<ffffffff8111f4dc>] access_process_vm+0x4c/0x200
> > > [<ffffffff8113f3fe>] ? fallback_alloc+0x14e/0x270
> > > [<ffffffff811afa4d>] proc_pid_cmdline+0x6d/0x120
> > > [<ffffffff81137eba>] ? alloc_pages_current+0x9a/0x100
> > > [<ffffffff811b037d>] proc_info_read+0xad/0xf0
> > > [<ffffffff81154315>] vfs_read+0xc5/0x190
> > > [<ffffffff811544e1>] sys_read+0x51/0x90
> > > [<ffffffff8100bf82>] system_call_fastpath+0x16/0x1b
> >
> > pgrep hung too, it's not just khugepaged hanging and it's not obvious
> > for now that khugepaged was guilty of forgetting an unlock, could be
> > the process deadlocked somewhere with the mmap_sem hold. Can you press
> > SYSRQ+T? Hopefully that will show the holder. Also is CONFIG_NUMA=y/n?
> Unfortunately, SYSRQ+T was not working. CONFIG_NUMA=y and this is an
> NUMA system as well.
I reviewed it again but it's unlikely the holder of the mmap_sem was
khugepaged. Something hung on the mmap_sem and pgrep and khugepaged
got blocked on it.
I'm however aware of a deadlock in pgd_lock, no idea if it's what
you're hitting but it worth fixing that one now!
x86 takes the pgd_lock by clearing irqs, and then it takes the
page_table_lock with irqs already off. It's always forbidden to keep
irqs off while taking the page_table_lock, because all IPIs are sent
for the tlb flushes with the page_table_lock held if PT locks are
disabled (NR_CPUS small) or if THP is on. It's not THP bug, it's core
bug in pgd_lock that will trigger with PT locks disabled too without
THP: all those spin_lock_irqsave must become spin_lock. Either that or
the page_table_lock must not be taken with irqs off.
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^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2011-01-28 16:51 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-01-25 23:48 mmotm 2011-01-25-15-47 uploaded akpm
2011-01-26 8:45 ` CAI Qian
2011-01-26 13:52 ` Andrea Arcangeli
2011-01-28 6:44 ` CAI Qian
2011-01-28 16:50 ` pgd_lock must be taken with irqs enabled Andrea Arcangeli
2011-01-26 10:20 ` [patch] epoll-fix-compiler-warning-and-optimize-the-non-blocking-path-fix Johannes Weiner
2011-01-26 15:05 ` Davide Libenzi
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