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d325185916
kernel_optimize_test/kernel
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Tejun Heo d325185916 workqueue: workqueue_congested() shouldn't translate WORK_CPU_UNBOUND into node number 
df2d5ae499 ("workqueue: map an unbound workqueues to multiple per-node
pool_workqueues") made unbound workqueues to map to multiple per-node
pool_workqueues and accordingly updated workqueue_contested() so that,
for unbound workqueues, it maps the specified @cpu to the NUMA node
number to obtain the matching pool_workqueue to query the congested
state.

Before this change, workqueue_congested() ignored @cpu for unbound
workqueues as there was only one pool_workqueue and some users
(fscache) called it with WORK_CPU_UNBOUND.  After the commit, this
causes the following oops as WORK_CPU_UNBOUND gets translated to
garbage by cpu_to_node().

  BUG: unable to handle kernel paging request at ffff8803598d98b8
  IP: [<ffffffff81043b7e>] unbound_pwq_by_node+0xa1/0xfa
  PGD 2421067 PUD 0
  Oops: 0000 [#1] SMP
  CPU: 1 PID: 2689 Comm: cat Tainted: GF            3.9.0-fsdevel+ #4
  task: ffff88003d801040 ti: ffff880025806000 task.ti: ffff880025806000
  RIP: 0010:[<ffffffff81043b7e>]  [<ffffffff81043b7e>] unbound_pwq_by_node+0xa1/0xfa
  RSP: 0018:ffff880025807ad8  EFLAGS: 00010202
  RAX: 0000000000000001 RBX: ffff8800388a2400 RCX: 0000000000000003
  RDX: ffff880025807fd8 RSI: ffffffff81a31420 RDI: ffff88003d8016e0
  RBP: ffff880025807ae8 R08: ffff88003d801730 R09: ffffffffa00b4898
  R10: ffffffff81044217 R11: ffff88003d801040 R12: 0000000064206e97
  R13: ffff880036059d98 R14: ffff880038cc8080 R15: ffff880038cc82d0
  FS:  00007f21afd9c740(0000) GS:ffff88003d100000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  CR2: ffff8803598d98b8 CR3: 000000003df49000 CR4: 00000000000007e0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  Stack:
   ffff8800388a2400 0000000000000002 ffff880025807b18 ffffffff810442ce
   ffffffff81044217 ffff880000000002 ffff8800371b4080 ffff88003d112ec0
   ffff880025807b38 ffffffffa00810b0 ffff880036059d88 ffff880036059be8
  Call Trace:
   [<ffffffff810442ce>] workqueue_congested+0xb7/0x12c
   [<ffffffffa00810b0>] fscache_enqueue_object+0xb2/0xe8 [fscache]
   [<ffffffffa007facd>] __fscache_acquire_cookie+0x3b9/0x56c [fscache]
   [<ffffffffa00ad8fe>] nfs_fscache_set_inode_cookie+0xee/0x132 [nfs]
   [<ffffffffa009e112>] do_open+0x9/0xd [nfs]
   [<ffffffff810e804a>] do_dentry_open+0x175/0x24b
   [<ffffffff810e8298>] finish_open+0x41/0x51

Fix it by using smp_processor_id() if @cpu is WORK_CPU_UNBOUND.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: David Howells <dhowells@redhat.com>
Tested-and-Acked-by: David Howells <dhowells@redhat.com>
2013-05-10 11:10:17 -07:00
..
cpu Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-04-30 08:15:40 -07:00
debug kgdb/sysrq: fix inconstistent help message of sysrq key 2013-04-30 17:04:10 -07:00
events Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
gcov
irq irqdomain: Allow quiet failure mode 2013-05-06 11:37:43 +10:00
power Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2013-05-02 19:40:34 -07:00
sched Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
time Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
trace Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block 2013-05-08 11:51:05 -07:00
.gitignore kernel/hz.bc: ignore. 2013-04-22 07:09:06 -07:00
acct.c fs: Fix hang with BSD accounting on frozen filesystem 2013-05-04 14:57:58 -04:00
async.c
audit_tree.c kernel/audit_tree.c: tree will leak memory when failure occurs in audit_trim_trees() 2013-04-29 15:54:26 -07:00
audit_watch.c
audit.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00
audit.h audit: remove unnecessary #if CONFIG_AUDIT 2013-04-29 15:54:26 -07:00
auditfilter.c kernel/auditfilter.c: tree and watch will memory leak when failure occurs 2013-04-29 15:54:26 -07:00
auditsc.c kernel/auditsc.c: use kzalloc instead of kmalloc+memset 2013-04-29 15:54:26 -07:00
backtracetest.c
bounds.c
capability.c Add file_ns_capable() helper function for open-time capability checking 2013-04-14 10:06:31 -07:00
cgroup_freezer.c
cgroup.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
compat.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2013-05-01 07:21:43 -07:00
configs.c proc: Supply PDE attribute setting accessor functions 2013-05-01 17:29:18 -04:00
context_tracking.c
cpu_pm.c
cpu.c
cpuset.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
extable.c extable: Flip the sorting message 2013-04-15 13:25:16 +02:00
fork.c Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block 2013-05-08 11:51:05 -07:00
freezer.c
futex_compat.c
futex.c
groups.c
hrtimer.c Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
hung_task.c
irq_work.c
itimer.c
jump_label.c
kallsyms.c kernel: kallsyms: memory override issue, need check destination buffer length 2013-04-15 15:17:26 +09:30
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c kexec: Use min() and min_t() to simplify logic 2013-04-30 17:04:07 -07:00
kmod.c kmod: remove call_usermodehelper_fns() 2013-04-30 17:04:06 -07:00
kprobes.c kprobes: Fix a double lock bug of kprobe_mutex 2013-04-18 08:58:38 -07:00
ksysfs.c
kthread.c kthread: implement probe_kthread_data() 2013-04-30 17:04:02 -07:00
latencytop.c
lglock.c
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
lockdep.c Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block 2013-05-08 11:51:05 -07:00
Makefile We get rid of the general module prefix confusion with a binary config option, 2013-05-05 10:58:06 -07:00
modsign_certificate.S
modsign_pubkey.c
module_signing.c
module-internal.h
module.c module: don't unlink the module until we've removed all exposure. 2013-04-17 13:23:02 +09:30
mutex-debug.c
mutex-debug.h
mutex.c mutex: Back out architecture specific check for negative mutex count 2013-04-19 09:33:36 +02:00
mutex.h
notifier.c
nsproxy.c proc: Split the namespace stuff out into linux/proc_ns.h 2013-05-01 17:29:39 -04:00
padata.c
panic.c dump_stack: implement arch-specific hardware description in task dumps 2013-04-30 17:04:02 -07:00
params.c
pid_namespace.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
pid.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
posix-cpu-timers.c posix_timers: Fix pre-condition to stop the tick on full dynticks 2013-04-22 19:59:25 +02:00
posix-timers.c posix-timers: Remove unused variable 2013-04-18 12:51:19 +02:00
printk.c aio: don't include aio.h in sched.h 2013-05-07 20:16:25 -07:00
profile.c proc: Supply PDE attribute setting accessor functions 2013-05-01 17:29:18 -04:00
ptrace.c aio: don't include aio.h in sched.h 2013-05-07 20:16:25 -07:00
range.c kernel/range.c: subtract_range: fix the broken phrase issued by printk 2013-04-30 17:04:01 -07:00
rcu.h
rcupdate.c
rcutiny_plugin.h
rcutiny.c
rcutorture.c
rcutree_plugin.h Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
rcutree_trace.c rcutrace: single_open() leaks 2013-05-05 00:16:35 -04:00
rcutree.c Merge commit '8700c95adb03' into timers/nohz 2013-05-02 17:54:19 +02:00
rcutree.h Merge commit '8700c95adb03' into timers/nohz 2013-05-02 17:54:19 +02:00
relay.c Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block 2013-05-08 10:13:35 -07:00
res_counter.c
resource.c mem hotunplug: fix kfree() of bootmem memory 2013-04-29 15:54:40 -07:00
rtmutex_common.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c locking/rtmutex/tester: Set correct permissions on sysfs files 2013-04-10 14:48:37 +02:00
rtmutex.c
rtmutex.h
rwsem.c
seccomp.c seccomp: allow BPF_XOR based ALU instructions. 2013-03-26 11:07:19 +11:00
semaphore.c semaphore: use `bool' type for semaphore_waiter's up 2013-04-30 17:04:08 -07:00
signal.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00
smp.c kernel/smp.c: cleanups 2013-04-30 17:04:03 -07:00
smpboot.c kthread: Prevent unpark race which puts threads on the wrong cpu 2013-04-12 14:18:43 +02:00
smpboot.h
softirq.c Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
spinlock.c
srcu.c
stacktrace.c
stop_machine.c
sys_ni.c unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE 2013-05-09 13:46:38 -04:00
sys.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2013-05-01 07:21:43 -07:00
sysctl_binary.c switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE 2013-05-09 14:53:20 -04:00
sysctl.c mm: replace hardcoded 3% with admin_reserve_pages knob 2013-04-29 15:54:36 -07:00
task_work.c
taskstats.c
test_kprobes.c kernel/: rename random32() to prandom_u32() 2013-04-29 18:28:42 -07:00
time.c
timeconst.bc
timer.c Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
tracepoint.c Tracing updates for Linux 3.10 2013-04-29 13:55:38 -07:00
tsacct.c
uid16.c
up.c
user_namespace.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
user-return-notifier.c
user.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
utsname_sysctl.c
utsname.c proc: Split the namespace stuff out into linux/proc_ns.h 2013-05-01 17:29:39 -04:00
wait.c
watchdog.c
workqueue_internal.h workqueue: include workqueue info when printing debug dump of a worker task 2013-04-30 17:04:02 -07:00
workqueue.c workqueue: workqueue_congested() shouldn't translate WORK_CPU_UNBOUND into node number 2013-05-10 11:10:17 -07:00