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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2006-03-29 02:11:20 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-29 04:36:43 +0200 |
| commit | 5876700cd399112ecfa70df36203c8c6660d84f8 (patch) | |
| tree | 3060724c6682ee7452bcb7b3c99eded75cd59ea7 /kernel/sys.c | |
| parent | [PATCH] revert "Optimize sys_times for a single thread process" (diff) | |
| download | linux-5876700cd399112ecfa70df36203c8c6660d84f8.tar.xz linux-5876700cd399112ecfa70df36203c8c6660d84f8.zip | |
[PATCH] do __unhash_process() under ->siglock
This patch moves __unhash_process() call from realease_task() to
__exit_signal(), so __detach_pid() is called with ->siglock held.
This means we don't need tasklist_lock to iterate over thread group anymore:
copy_process() was already changed to do attach_pid()
under ->siglock.
Eric's "pidhash-kill-switch_exec_pids.patch" from -mm
changed de_thread() so it doesn't touch PIDTYPE_TGID.
NOTE: de_thread() still needs some attention. It still changes task->pid
lockless. Taking ->sighand.siglock here allows to do more tasklist_lock
removals.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/sys.c')
0 files changed, 0 insertions, 0 deletions