diff options
author | Oleg Nesterov <oleg@tv-sign.ru> | 2006-09-29 02:01:09 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-29 09:18:20 -0700 |
commit | 29b884921634e1e01cbd276e1c9b8fc07a7e4a90 (patch) | |
tree | 951fce8626715b1ad26ca81bec9002cfcb8242af /mm/mmzone.c | |
parent | e8106b941ceab68cc5ff713df7b1276484554584 (diff) |
[PATCH] set EXIT_DEAD state in do_exit(), not in schedule()
schedule() checks PF_DEAD on every context switch and sets ->state = EXIT_DEAD
to ensure that the exiting task will be deactivated. Note that this EXIT_DEAD
is in fact a "random" value, we can use any bit except normal TASK_XXX values.
It is better to set this state in do_exit() along with PF_DEAD flag and remove
that check in schedule().
We are safe wrt concurrent try_to_wake_up() (for example ptrace, tkill), it
can not change task's ->state: the 'state' argument of try_to_wake_up() can't
have EXIT_DEAD bit. And in case when try_to_wake_up() sees a stale value of
->state == TASK_RUNNING it will do nothing.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/mmzone.c')
0 files changed, 0 insertions, 0 deletions