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Thomas Gleixner 9c40cef2b7 sched: Move blk_schedule_flush_plug() out of __schedule() 
There is no real reason to run blk_schedule_flush_plug() with
interrupts and preemption disabled.

Move it into schedule() and call it when the task is going voluntarily
to sleep. There might be false positives when the task is woken
between that call and actually scheduling, but that's not really
different from being woken immediately after switching away.

This fixes a deadlock in the scheduler where the
blk_schedule_flush_plug() callchain enables interrupts and thereby
allows a wakeup to happen of the task that's going to sleep.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable@kernel.org # 2.6.39+
Link: http://lkml.kernel.org/n/tip-dwfxtra7yg1b5r65m32ywtct@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-08-29 12:26:59 +02:00
..
debug
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
2011-08-01 13:39:40 -10:00
events
perf: Remove perf_event_attr::type check
2011-07-21 20:41:55 +02:00
gcov
gcov: disable CONSTRUCTORS for UML
2011-07-26 16:49:45 -07:00
irq
Revert "irq: Always set IRQF_ONESHOT if no primary handler is specified"
2011-08-23 10:36:51 -07:00
power
PM / Domains: Fix build for CONFIG_PM_RUNTIME unset
2011-08-14 13:34:31 +02:00
time
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2011-07-22 16:52:18 -07:00
trace
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
2011-08-19 10:47:07 -07:00
.gitignore
…
acct.c
pass a struct path to vfs_statfs
2010-08-09 16:48:42 -04:00
async.c
async: Fixed an include coding style issue
2011-06-14 22:48:46 -04:00
audit_tree.c
audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()
2011-07-20 14:10:11 -07:00
audit_watch.c
kill path_lookup()
2011-03-14 09:15:23 -04:00
audit.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
audit.h
audit: make functions static
2010-10-30 01:42:19 -04:00
auditfilter.c
netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms
2011-03-03 10:55:40 -08:00
auditsc.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
backtracetest.c
…
bounds.c
memcg: remove direct page_cgroup-to-page pointer
2011-03-23 19:46:28 -07:00
capability.c
Merge branch 'master' into next
2011-05-19 18:51:57 +10:00
cgroup_freezer.c
cgroups: add per-thread subsystem callbacks
2011-05-26 17:12:34 -07:00
cgroup.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
2011-07-27 19:26:38 -07:00
compat.c
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
2011-07-30 00:08:53 -07:00
configs.c
kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n
2011-07-25 20:57:15 -07:00
cpu.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
cpuset.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
crash_dump.c
crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn
2011-03-23 19:47:19 -07:00
cred.c
move RLIMIT_NPROC check from set_user() to do_execve_common()
2011-08-11 11:24:42 -07:00
delayacct.c
KVM: Steal time implementation
2011-07-14 12:59:14 +03:00
dma.c
…
elfcore.c
…
exec_domain.c
sys_personality: remove the bogus checks in sys_personality()->__set_personality() path
2010-08-09 20:45:05 -07:00
exit.c
ipc: introduce shm_rmid_forced sysctl
2011-07-26 16:49:44 -07:00
extable.c
extable, core_kernel_data(): Make sure all archs define _sdata
2011-05-20 08:56:56 +02:00
fork.c
move RLIMIT_NPROC check from set_user() to do_execve_common()
2011-08-11 11:24:42 -07:00
freezer.c
Freezer: Use SMP barriers
2011-05-17 23:19:17 +02:00
futex_compat.c
userns: user namespaces: convert several capable() calls
2011-03-23 19:47:08 -07:00
futex.c
Merge branch 'linus' into core/urgent
2011-08-04 09:09:27 +02:00
groups.c
userns: user namespaces: convert several capable() calls
2011-03-23 19:47:08 -07:00
hrtimer.c
hrtimers: Fix typo causing erratic timers
2011-05-25 15:31:58 -07:00
hung_task.c
watchdog, hung_task_timeout: Add Kconfig configurable default
2011-04-28 09:13:17 +02:00
irq_work.c
irq_work: Use per cpu atomics instead of regular atomics
2010-12-18 15:54:48 +01:00
itimer.c
…
jump_label.c
jump_label: Fix jump_label update for modules
2011-06-29 09:59:17 -04:00
kallsyms.c
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2011-03-25 17:52:22 -07:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
arch:Kconfig.locks Remove unused config option.
2011-04-10 17:01:05 +02:00
Kconfig.preempt
sched: Isolate preempt counting in its own config option
2011-06-10 15:15:40 +02:00
kexec.c
treewide: Convert uses of struct resource to resource_size(ptr)
2011-06-10 14:55:36 +02:00
kfifo.c
kfifo: fix scatterlist usage
2010-10-01 10:50:58 -07:00
kmod.c
Boot up with usermodehelper disabled
2011-08-03 22:03:29 -10:00
kprobes.c
kprobes: Return -ENOENT if probe point doesn't exist
2011-07-15 15:11:47 -04:00
ksysfs.c
kernel/ksysfs.c: expose file_caps_enabled in sysfs
2011-04-19 16:45:51 -07:00
kthread.c
cpuset: Fix cpuset_cpus_allowed_fallback(), don't update tsk->rt.nr_cpus_allowed
2011-05-28 17:02:57 +02:00
latencytop.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
lockdep_internals.h
lockdep: No need to disable preemption in debug atomic ops
2010-05-04 05:38:16 +02:00
lockdep_proc.c
lockdep: Remove unused 'factor' variable from lockdep_stats_show()
2011-03-23 13:54:47 +01:00
lockdep_states.h
…
lockdep.c
lockdep: Fix wrong assumption in match_held_lock
2011-08-09 11:57:35 +02:00
Makefile
jump label: Reduce the cycle count by changing the link order
2011-08-05 23:57:33 +02:00
module.c
module: add /sys/module/<name>/uevent files
2011-07-24 22:06:04 +09:30
mutex-debug.c
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
mutex-debug.h
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
mutex.c
lockdep, mutex: provide mutex_lock_nest_lock
2011-05-25 08:39:17 -07:00
mutex.h
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
notifier.c
notifiers: sys: move reboot notifiers into reboot.h
2011-07-25 20:57:14 -07:00
nsproxy.c
make sure that nsproxy_cache is initialized early enough
2011-07-20 01:44:07 -04:00
padata.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
panic.c
panic: panic=-1 for immediate reboot
2011-07-26 16:49:45 -07:00
params.c
module: add /sys/module/<name>/uevent files
2011-07-24 22:06:04 +09:30
pid_namespace.c
pidns: call pid_ns_prepare_proc() from create_pid_namespace()
2011-03-23 19:46:58 -07:00
pid.c
rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check
2011-07-08 22:21:58 +02:00
pm_qos_params.c
plist: Remove the need to supply locks to plist heads
2011-07-08 14:02:53 +02:00
posix-cpu-timers.c
hrtimers: Avoid touching inactive timer bases
2011-05-23 13:59:54 +02:00
posix-timers.c
posix-timers: RCU conversion
2011-05-24 12:10:51 +02:00
printk.c
kernel/printk: do not turn off bootconsole in printk_late_init() if keep_bootcon
2011-08-25 16:25:34 -07:00
profile.c
kernel/profile.c: remove some duplicate code from profile_hits()
2011-05-26 17:12:37 -07:00
ptrace.c
connector: add an event for monitoring process tracers
2011-07-18 21:38:33 +02:00
range.c
kernel/range.c: fix clean_sort_range() for the case of full array
2010-11-12 07:55:31 -08:00
rcupdate.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
rcutiny_plugin.h
rcu: Converge TINY_RCU expedited and normal boosting
2011-05-05 23:16:58 -07:00
rcutiny.c
sanitize <linux/prefetch.h> usage
2011-05-20 12:50:29 -07:00
rcutorture.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
rcutree_plugin.h
softirq,rcu: Inform RCU of irq_exit() activity
2011-07-20 10:50:12 -07:00
rcutree_trace.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
rcutree.c
rcu: Prevent RCU callbacks from executing before scheduler initialized
2011-07-13 08:17:56 -07:00
rcutree.h
rcu: Move RCU_BOOST #ifdefs to header file
2011-06-16 16:12:05 -07:00
relay.c
Clean up relay_alloc_page_array() slightly by using vzalloc rather than vmalloc and memset
2010-11-05 08:21:34 -07:00
res_counter.c
memcg: res_counter_read_u64(): fix potential races on 32-bit machines
2011-03-23 19:46:22 -07:00
resource.c
resources: Add lookup_resource()
2011-07-30 21:21:39 +02:00
rtmutex_common.h
rtmutex: Simplify PI algorithm and make highest prio task get lock
2011-01-27 21:13:51 -05:00
rtmutex-debug.c
rtmutex: Simplify PI algorithm and make highest prio task get lock
2011-01-27 21:13:51 -05:00
rtmutex-debug.h
…
rtmutex-tester.c
rtmutex: tester: Remove the remaining BKL leftovers
2011-02-22 22:07:22 +01:00
rtmutex.c
plist: Remove the need to supply locks to plist heads
2011-07-08 14:02:53 +02:00
rtmutex.h
…
rwsem.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
sched_autogroup.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
sched_autogroup.h
sched: Skip autogroup when looking for all rt sched groups
2011-07-01 10:39:08 +02:00
sched_clock.c
sched: Add some clock info to sched_debug
2010-11-23 10:29:08 +01:00
sched_cpupri.c
sched: No need for bootmem special cases
2010-07-17 12:06:22 +02:00
sched_cpupri.h
sched: No need for bootmem special cases
2010-07-17 12:06:22 +02:00
sched_debug.c
sched: Get rid of lock_depth
2011-04-24 13:18:38 +02:00
sched_fair.c
sched: Cleanup duplicate local variable in [enqueue|dequeue]_task_fair
2011-07-22 12:47:22 +02:00
sched_features.h
Merge branch 'kvm-updates/3.1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2011-07-24 09:07:03 -07:00
sched_idletask.c
sched: Drop the rq argument to sched_class::select_task_rq()
2011-04-14 08:52:36 +02:00
sched_rt.c
sched: Skip autogroup when looking for all rt sched groups
2011-07-01 10:39:08 +02:00
sched_stats.h
sched: More sched_domain iterations fixes
2011-05-28 17:02:54 +02:00
sched_stoptask.c
sched: Drop the rq argument to sched_class::select_task_rq()
2011-04-14 08:52:36 +02:00
sched.c
sched: Move blk_schedule_flush_plug() out of __schedule()
2011-08-29 12:26:59 +02:00
seccomp.c
…
semaphore.c
…
signal.c
signals: sys_ssetmask/sys_rt_sigsuspend should use set_current_blocked()
2011-07-27 12:53:36 -07:00
smp.c
generic-ipi: Fix kexec boot crash by initializing call_single_queue before enabling interrupts
2011-06-17 10:17:12 +02:00
softirq.c
softirq,rcu: Inform RCU of irq_exit() activity
2011-07-20 10:50:12 -07:00
spinlock.c
…
srcu.c
rcu: demote SRCU_SYNCHRONIZE_DELAY from kernel-parameter status
2011-01-14 04:56:49 -08:00
stacktrace.c
stack_trace: Add weak save_stack_trace_regs()
2011-06-14 22:48:52 -04:00
stop_machine.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
sys_ni.c
All Arch: remove linkage for sys_nfsservctl system call
2011-08-26 15:09:58 -07:00
sys.c
Add a personality to report 2.6.x version numbers
2011-08-25 10:17:28 -07:00
sysctl_binary.c
xfs: remove subdirectories
2011-08-12 16:21:35 -05:00
sysctl_check.c
xfs: remove subdirectories
2011-08-12 16:21:35 -05:00
sysctl.c
sysctl,rcu: Convert call_rcu(free_head) to kfree
2011-07-20 14:10:18 -07:00
taskstats.c
taskstats: add_del_listener() should ignore !valid listeners
2011-08-03 14:25:20 -10:00
test_kprobes.c
kprobes: Fix selftest to clear flags field for reusing probes
2010-10-14 08:55:27 +02:00
time.c
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2011-03-15 18:53:35 -07:00
timeconst.pl
…
timer.c
timers: Consider slack value in mod_timer()
2011-06-03 15:02:32 +02:00
tracepoint.c
jump label: Introduce static_branch() interface
2011-04-04 12:48:08 -04:00
tsacct.c
taskstats: use real microsecond granularity for CPU times
2010-10-27 18:03:17 -07:00
uid16.c
userns: user namespaces: convert several capable() calls
2011-03-23 19:47:08 -07:00
up.c
…
user_namespace.c
user_ns: improve the user_ns on-the-slab packaging
2011-01-13 08:03:18 -08:00
user-return-notifier.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
user.c
userns: add a user_namespace as creator/owner of uts_namespace
2011-03-23 19:46:59 -07:00
utsname_sysctl.c
…
utsname.c
ns proc: Add support for the uts namespace
2011-05-10 14:35:35 -07:00
wait.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
watchdog.c
perf, x86: P4 PMU - Introduce event alias feature
2011-07-14 17:25:04 -04:00
workqueue_sched.h
workqueue: implement concurrency managed dynamic worker pool
2010-06-29 10:07:14 +02:00
workqueue.c
Merge branch 'for-3.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2011-07-22 15:07:15 -07:00