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| author |   Roland McGrath <roland@redhat.com> | 2005-10-21 15:03:29 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-21 15:38:08 -0700 |
| commit | 25f407f0b668f5e4ebd5d13e1fb4306ba6427ead (patch) | |
| tree | 10d8661419da9e0d6be6d22ef319582d052c4a26 /kernel/exit.c | |
| parent | Revert "Fix cpu timers exit deadlock and races" (diff) | |
| download | linux-dev-25f407f0b668f5e4ebd5d13e1fb4306ba6427ead.tar.xz linux-dev-25f407f0b668f5e4ebd5d13e1fb4306ba6427ead.zip | |
[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.c | 1 |
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) group_dead = atomic_dec_and_test(&tsk->signal->live); if (group_dead) { del_timer_sync(&tsk->signal->real_timer); + exit_itimers(tsk->signal); acct_process(code); } exit_mm(tsk); |