[tip:sched/core] sched/numa: Move task_numa_free() to __put_task_struct()
From: tip-bot for Mike Galbraith
Date: Tue Mar 11 2014 - 08:44:04 EST
Commit-ID: 156654f491dd8d52687a5fbe1637f472a52ce75b
Gitweb: http://git.kernel.org/tip/156654f491dd8d52687a5fbe1637f472a52ce75b
Author: Mike Galbraith <bitbucket@xxxxxxxxx>
AuthorDate: Fri, 28 Feb 2014 07:23:11 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 11 Mar 2014 12:05:43 +0100
sched/numa: Move task_numa_free() to __put_task_struct()
Bad idea on -rt:
[ 908.026136] [<ffffffff8150ad6a>] rt_spin_lock_slowlock+0xaa/0x2c0
[ 908.026145] [<ffffffff8108f701>] task_numa_free+0x31/0x130
[ 908.026151] [<ffffffff8108121e>] finish_task_switch+0xce/0x100
[ 908.026156] [<ffffffff81509c0a>] thread_return+0x48/0x4ae
[ 908.026160] [<ffffffff8150a095>] schedule+0x25/0xa0
[ 908.026163] [<ffffffff8150ad95>] rt_spin_lock_slowlock+0xd5/0x2c0
[ 908.026170] [<ffffffff810658cf>] get_signal_to_deliver+0xaf/0x680
[ 908.026175] [<ffffffff8100242d>] do_signal+0x3d/0x5b0
[ 908.026179] [<ffffffff81002a30>] do_notify_resume+0x90/0xe0
[ 908.026186] [<ffffffff81513176>] int_signal+0x12/0x17
[ 908.026193] [<00007ff2a388b1d0>] 0x7ff2a388b1cf
and since upstream does not mind where we do this, be a bit nicer ...
Signed-off-by: Mike Galbraith <bitbucket@xxxxxxxxx>
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1393568591.6018.27.camel@xxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/fork.c | 1 +
kernel/sched/core.c | 2 --
2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/kernel/fork.c b/kernel/fork.c
index a17621c..332688e 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -237,6 +237,7 @@ void __put_task_struct(struct task_struct *tsk)
WARN_ON(atomic_read(&tsk->usage));
WARN_ON(tsk == current);
+ task_numa_free(tsk);
security_task_free(tsk);
exit_creds(tsk);
delayacct_tsk_free(tsk);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index dd89c27..9e126a2 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2151,8 +2151,6 @@ static void finish_task_switch(struct rq *rq, struct task_struct *prev)
if (mm)
mmdrop(mm);
if (unlikely(prev_state == TASK_DEAD)) {
- task_numa_free(prev);
-
if (prev->sched_class->task_dead)
prev->sched_class->task_dead(prev);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/