From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
alan@lxorguk.ukuu.org.uk, Mike Galbraith <mgalbraith@suse.de>,
Tejun Heo <tj@kernel.org>
Subject: [ 13/27] workqueue: exit rescuer_thread() as TASK_RUNNING
Date: Thu, 6 Dec 2012 16:58:57 -0800 [thread overview]
Message-ID: <20121207005829.502723734@linuxfoundation.org> (raw)
In-Reply-To: <20121207005825.232489605@linuxfoundation.org>
3.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mike Galbraith <mgalbraith@suse.de>
commit 412d32e6c98527078779e5b515823b2810e40324 upstream.
A rescue thread exiting TASK_INTERRUPTIBLE can lead to a task scheduling
off, never to be seen again. In the case where this occurred, an exiting
thread hit reiserfs homebrew conditional resched while holding a mutex,
bringing the box to its knees.
PID: 18105 TASK: ffff8807fd412180 CPU: 5 COMMAND: "kdmflush"
#0 [ffff8808157e7670] schedule at ffffffff8143f489
#1 [ffff8808157e77b8] reiserfs_get_block at ffffffffa038ab2d [reiserfs]
#2 [ffff8808157e79a8] __block_write_begin at ffffffff8117fb14
#3 [ffff8808157e7a98] reiserfs_write_begin at ffffffffa0388695 [reiserfs]
#4 [ffff8808157e7ad8] generic_perform_write at ffffffff810ee9e2
#5 [ffff8808157e7b58] generic_file_buffered_write at ffffffff810eeb41
#6 [ffff8808157e7ba8] __generic_file_aio_write at ffffffff810f1a3a
#7 [ffff8808157e7c58] generic_file_aio_write at ffffffff810f1c88
#8 [ffff8808157e7cc8] do_sync_write at ffffffff8114f850
#9 [ffff8808157e7dd8] do_acct_process at ffffffff810a268f
[exception RIP: kernel_thread_helper]
RIP: ffffffff8144a5c0 RSP: ffff8808157e7f58 RFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8107af60 RDI: ffff8803ee491d18
RBP: 0000000000000000 R8: 0000000000000000 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
Signed-off-by: Mike Galbraith <mgalbraith@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/workqueue.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2266,8 +2266,10 @@ static int rescuer_thread(void *__wq)
repeat:
set_current_state(TASK_INTERRUPTIBLE);
- if (kthread_should_stop())
+ if (kthread_should_stop()) {
+ __set_current_state(TASK_RUNNING);
return 0;
+ }
/*
* See whether any cpu is asking for help. Unbounded
next prev parent reply other threads:[~2012-12-07 1:00 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-07 0:58 [ 00/27] 3.6.10-stable review Greg Kroah-Hartman
2012-12-07 0:58 ` [ 01/27] Dove: Attempt to fix PMU/RTC interrupts Greg Kroah-Hartman
2012-12-07 0:58 ` [ 02/27] Dove: Fix irq_to_pmu() Greg Kroah-Hartman
2012-12-07 0:58 ` [ 03/27] drm/radeon/dce4+: dont use radeon_crtc for vblank callback Greg Kroah-Hartman
2012-12-07 0:58 ` [ 04/27] drm/radeon: properly handle mc_stop/mc_resume on evergreen+ (v2) Greg Kroah-Hartman
2012-12-07 0:58 ` [ 05/27] drm/radeon: properly track the crtc not_enabled case evergreen_mc_stop() Greg Kroah-Hartman
2012-12-07 0:58 ` [ 06/27] mm/vmemmap: fix wrong use of virt_to_page Greg Kroah-Hartman
2012-12-07 0:58 ` [ 07/27] mm: vmscan: fix endless loop in kswapd balancing Greg Kroah-Hartman
2012-12-07 0:58 ` [ 08/27] mm: soft offline: split thp at the beginning of soft_offline_page() Greg Kroah-Hartman
2012-12-07 0:58 ` [ 09/27] target: Fix handling of aborted commands Greg Kroah-Hartman
2012-12-07 0:58 ` [ 10/27] iwlwifi: fix the basic CCK rates calculation Greg Kroah-Hartman
2012-12-07 0:58 ` [ 11/27] ARM: Kirkwood: Update PCI-E fixup Greg Kroah-Hartman
2012-12-07 0:58 ` [ 12/27] x86, fpu: Avoid FPU lazy restore after suspend Greg Kroah-Hartman
2012-12-07 0:58 ` Greg Kroah-Hartman [this message]
2012-12-07 0:58 ` [ 14/27] mac80211: fix remain-on-channel (non-)cancelling Greg Kroah-Hartman
2012-12-07 0:58 ` [ 15/27] md/raid1{,0}: fix deadlock in bitmap_unplug Greg Kroah-Hartman
2012-12-07 0:59 ` [ 16/27] i7300_edac: Fix error flag testing Greg Kroah-Hartman
2012-12-07 0:59 ` [ 17/27] Revert "sched, autogroup: Stop going ahead if autogroup is disabled" Greg Kroah-Hartman
2012-12-07 17:22 ` Joseph Salisbury
2012-12-07 17:30 ` Joseph Salisbury
2012-12-09 23:41 ` Ben Hutchings
2012-12-07 17:31 ` Greg Kroah-Hartman
2012-12-07 17:43 ` Joseph Salisbury
2012-12-07 0:59 ` [ 18/27] bnx2x: remove redundant warning log Greg Kroah-Hartman
2012-12-07 0:59 ` [ 19/27] i7core_edac: fix panic when accessing sysfs files Greg Kroah-Hartman
2012-12-07 0:59 ` [ 20/27] s390/mm: have 16 byte aligned struct pages Greg Kroah-Hartman
2012-12-07 10:00 ` Heiko Carstens
2012-12-07 15:07 ` Greg Kroah-Hartman
2012-12-07 0:59 ` [ 21/27] net: qmi_wwan: adding more ZTE devices Greg Kroah-Hartman
2012-12-07 0:59 ` [ 22/27] net: qmi_wwan: add Huawei E173 Greg Kroah-Hartman
2012-12-07 0:59 ` [ 23/27] ACPI: missing break Greg Kroah-Hartman
2012-12-07 0:59 ` [ 24/27] i915: Quirk no_lvds on Gigabyte GA-D525TUD ITX motherboard Greg Kroah-Hartman
2012-12-07 4:36 ` Calvin Walton
2012-12-07 16:37 ` Greg Kroah-Hartman
2012-12-07 0:59 ` [ 25/27] drm/i915: Add no-lvds quirk for Supermicro X7SPA-H Greg Kroah-Hartman
2012-12-07 0:59 ` [ 26/27] x86, amd: Disable way access filter on Piledriver CPUs Greg Kroah-Hartman
2012-12-07 0:59 ` [ 27/27] 8139cp: revert "set ring address before enabling receiver" Greg Kroah-Hartman
2012-12-07 13:36 ` [ 00/27] 3.6.10-stable review Holger Hoffstaette
2012-12-08 0:46 ` Shuah Khan
2012-12-08 0:58 ` Shuah Khan
2012-12-08 5:40 ` satoru takeuchi
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