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authorOleg Nesterov <oleg@redhat.com>2016-11-14 19:46:12 +0100
committerIngo Molnar <mingo@kernel.org>2016-11-22 12:33:43 +0100
commit8e5bfa8c1f8471aa4a2d30be631ef2b50e10abaf (patch)
treead3d1c2dc3f1770ac865c8f1df91a53c1e276728 /kernel/exit.c
parent18f649ef344127ef6de23a5a4272dbe2fdb73dde (diff)
downloadop-kernel-dev-8e5bfa8c1f8471aa4a2d30be631ef2b50e10abaf.zip
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sched/autogroup: Do not use autogroup->tg in zombie threads
Exactly because for_each_thread() in autogroup_move_group() can't see it and update its ->sched_task_group before _put() and possibly free(). So the exiting task needs another sched_move_task() before exit_notify() and we need to re-introduce the PF_EXITING (or similar) check removed by the previous change for another reason. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: hartsjc@redhat.com Cc: vbendel@redhat.com Cc: vlovejoy@redhat.com Link: http://lkml.kernel.org/r/20161114184612.GA15968@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/exit.c')
-rw-r--r--kernel/exit.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 9d68c45..3076f30 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -836,6 +836,7 @@ void __noreturn do_exit(long code)
*/
perf_event_exit_task(tsk);
+ sched_autogroup_exit_task(tsk);
cgroup_exit(tsk);
/*
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