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e94a7de2a3d2da42f0d124c7501195f1cdffa232
i2som-imx-linux/kernel
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Omar Sandoval e94a7de2a3 sched/wait: Fix add_wait_queue() behavioral change 
commit c6b9d9a330 upstream.

The following cleanup commit:

  50816c4899 ("sched/wait: Standardize internal naming of wait-queue entries")

... unintentionally changed the behavior of add_wait_queue() from
inserting the wait entry at the head of the wait queue to the tail
of the wait queue.

Beyond a negative performance impact this change in behavior
theoretically also breaks wait queues which mix exclusive and
non-exclusive waiters, as non-exclusive waiters will not be
woken up if they are queued behind enough exclusive waiters.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-team@fb.com
Fixes: ("sched/wait: Standardize internal naming of wait-queue entries")
Link: http://lkml.kernel.org/r/a16c8ccffd39bd08fdaa45a5192294c784b803a7.1512544324.git.osandov@fb.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-02-16 20:22:43 +01:00
..
bpf
bpf: reject stores into ctx via st and xadd
2018-01-31 14:03:50 +01:00
cgroup
cgroup: fix css_task_iter crash on CSS_TASK_ITER_PROC
2018-01-17 09:45:18 +01:00
configs
…
debug
kdb: Fix handling of kallsyms_symbol_next() return value
2017-12-14 09:52:58 +01:00
events
perf/core: Fix memory leak triggered by perf --namespace
2018-02-03 17:39:15 +01:00
gcov
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq
genirq: Track whether the trigger type has been set
2017-11-30 08:40:52 +00:00
livepatch
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
locking
futex: Avoid violating the 10th rule of futex
2018-01-23 19:58:11 +01:00
power
PM / s2idle: Clear the events_check_enabled flag
2017-12-20 10:10:23 +01:00
printk
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
rcu
rcu: Fix up pending cbs check in rcu_prepare_for_idle
2017-11-24 08:37:04 +01:00
sched
sched/wait: Fix add_wait_queue() behavioral change
2018-02-16 20:22:43 +01:00
time
hrtimer: Reset hrtimer cpu base proper on CPU hotplug
2018-01-31 14:03:49 +01:00
trace
tracing: Fix converting enum's from the map in trace_event_eval_update()
2018-01-23 19:58:16 +01:00
.gitignore
…
acct.c
kernel/acct.c: fix the acct->needcheck check in check_free_space()
2018-01-10 09:31:17 +01:00
async.c
…
audit_fsnotify.c
…
audit_tree.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
audit_watch.c
…
audit.c
audit: ensure that 'audit=1' actually enables audit for PID 1
2017-12-17 15:08:00 +01:00
audit.h
…
auditfilter.c
…
auditsc.c
…
backtracetest.c
…
bounds.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
capability.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compat.c
…
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
timers: Reinitialize per cpu bases on hotplug
2018-01-02 20:31:15 +01:00
crash_core.c
kdump: write correct address of mem_section into vmcoreinfo
2018-01-17 09:45:27 +01:00
crash_dump.c
…
cred.c
…
delayacct.c
delayacct: Account blkio completion on the correct task
2018-01-23 19:58:13 +01:00
dma.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
elfcore.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
exec_domain.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
exit.c
kernel/exit.c: export abort() to modules
2018-02-13 10:19:49 +01:00
extable.c
…
fork.c
arch, mm: Allow arch_dup_mmap() to fail
2017-12-29 17:53:43 +01:00
freezer.c
…
futex_compat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
futex.c
futex: Fix OWNER_DEAD fixup
2018-02-03 17:38:47 +01:00
groups.c
kernel: make groups_sort calling a responsibility group_info allocators
2017-12-20 10:10:18 +01:00
hung_task.c
…
irq_work.c
…
jump_label.c
jump_label: Invoke jump_label_test() via early_initcall()
2017-12-14 09:53:13 +01:00
kallsyms.c
…
kcmp.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kexec_core.c
…
kexec_file.c
…
kexec_internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kexec.c
…
kmod.c
…
kprobes.c
kprobes: Use synchronize_rcu_tasks() for optprobe with CONFIG_PREEMPT=y
2017-12-10 13:40:40 +01:00
ksysfs.c
…
kthread.c
…
latencytop.c
…
Makefile
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
memremap.c
memremap: add scheduling point to devm_memremap_pages
2017-10-03 17:54:25 -07:00
module_signing.c
…
module-internal.h
…
module.c
module/retpoline: Warn about missing retpoline in module
2018-02-07 11:12:18 -08:00
notifier.c
…
nsproxy.c
…
padata.c
…
panic.c
…
params.c
kernel/params.c: improve STANDARD_PARAM_DEF readability
2017-10-03 17:54:26 -07:00
pid_namespace.c
…
pid.c
…
profile.c
…
ptrace.c
…
range.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
reboot.c
…
relay.c
…
resource.c
…
seccomp.c
locking/barriers: Convert users of lockless_dereference() to READ_ONCE()
2017-12-25 14:26:21 +01:00
signal.c
kernel/signal.c: remove the no longer needed SIGNAL_UNKILLABLE check in complete_signal()
2018-01-10 09:31:20 +01:00
smp.c
…
smpboot.c
watchdog/core, powerpc: Lock cpus across reconfiguration
2017-10-04 10:53:54 +02:00
smpboot.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
softirq.c
…
stacktrace.c
…
stop_machine.c
…
sys_ni.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sys.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sysctl_binary.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sysctl.c
pipe: match pipe_max_size data type with procfs
2017-12-14 09:53:08 +01:00
task_work.c
locking/barriers: Convert users of lockless_dereference() to READ_ONCE()
2017-12-25 14:26:21 +01:00
taskstats.c
…
test_kprobes.c
…
torture.c
…
tracepoint.c
…
tsacct.c
…
ucount.c
…
uid16.c
kernel: make groups_sort calling a responsibility group_info allocators
2017-12-20 10:10:18 +01:00
umh.c
…
up.c
…
user_namespace.c
…
user-return-notifier.c
…
user.c
…
utsname_sysctl.c
…
utsname.c
…
watchdog_hld.c
Merge branch 'linus' into core/urgent, to pick up dependent commits
2017-11-04 08:53:04 +01:00
watchdog.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
workqueue_internal.h
Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2017-11-06 12:26:49 -08:00
workqueue.c
workqueue: avoid hard lockups in show_workqueue_state()
2018-01-23 19:58:18 +01:00