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| author | Vincent Guittot <[email protected]> | 2018-04-26 10:19:32 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2018-05-03 05:38:03 +0000 |
| commit | 457be908c83637ee10bda085a23dc05afa3b14a0 (patch) | |
| tree | e578083954eca7d085ad6428ca5ddc140657c40a /tools/perf/util/llvm-utils.c | |
| parent | stop_machine, sched: Fix migrate_swap() vs. active_balance() deadlock (diff) | |
| download | kernel-457be908c83637ee10bda085a23dc05afa3b14a0.tar.gz kernel-457be908c83637ee10bda085a23dc05afa3b14a0.zip | |
sched/fair: Fix the update of blocked load when newly idle
With commit:
31e77c93e432 ("sched/fair: Update blocked load when newly idle")
... we release the rq->lock when updating blocked load of idle CPUs.
This opens a time window during which another CPU can add a task to this
CPU's cfs_rq.
The check for newly added task of idle_balance() is not in the common path.
Move the out label to include this check.
Reported-by: Heiner Kallweit <[email protected]>
Tested-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Vincent Guittot <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Fixes: 31e77c93e432 ("sched/fair: Update blocked load when newly idle")
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/util/llvm-utils.c')
0 files changed, 0 insertions, 0 deletions