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authorRoland McGrath <roland@redhat.com>2005-10-21 18:03:29 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-21 18:38:08 -0400
commit25f407f0b668f5e4ebd5d13e1fb4306ba6427ead (patch)
tree10d8661419da9e0d6be6d22ef319582d052c4a26 /kernel/exit.c
parent9465bee863bc4c6cf1566c12d6f92a8133e3da5c (diff)
[PATCH] Call exit_itimers from do_exit, not __exit_signal
When I originally moved exit_itimers into __exit_signal, that was the only place where we could reliably know it was the last thread in the group dying, without races. Since then we've gotten the signal_struct.live counter, and do_exit can reliably do group-wide cleanup work. This patch moves the call to do_exit, where it's made without locks. This avoids the deadlock issues that the old __exit_signal code's comment talks about, and the one that Oleg found recently with process CPU timers. [ This replaces e03d13e985d48ac4885382c9e3b1510c78bd047f, which is why it was just reverted. ] Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Linus Torvalds <torvalds@osdl.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 43077732619b..3b25b182d2be 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -843,6 +843,7 @@ fastcall NORET_TYPE void do_exit(long code)
843 group_dead = atomic_dec_and_test(&tsk->signal->live); 843 group_dead = atomic_dec_and_test(&tsk->signal->live);
844 if (group_dead) { 844 if (group_dead) {
845 del_timer_sync(&tsk->signal->real_timer); 845 del_timer_sync(&tsk->signal->real_timer);
846 exit_itimers(tsk->signal);
846 acct_process(code); 847 acct_process(code);
847 } 848 }
848 exit_mm(tsk); 849 exit_mm(tsk);