Messages in this thread Patch in this message |  | | | Date | Thu, 6 Mar 2008 03:04:49 +0300 | | From | Oleg Nesterov <> | | Subject | [PATCH -mm] send_group_sigqueue: don't take tasklist_lock |
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(depends on signals-re-assign-cld_continued-notification-from-the-sender-to-reciever.patch)
handle_stop_signal() was changed, now send_group_sigqueue() doesn't need tasklist_lock.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
--- 25/kernel/signal.c~5_SGS_NO_TASKLIST 2008-03-06 01:34:57.000000000 +0300 +++ 25/kernel/signal.c 2008-03-06 02:54:27.000000000 +0300 @@ -1336,7 +1336,6 @@ send_group_sigqueue(int sig, struct sigq BUG_ON(!(q->flags & SIGQUEUE_PREALLOC)); - read_lock(&tasklist_lock); /* Since it_lock is held, p->sighand cannot be NULL. */ spin_lock_irqsave(&p->sighand->siglock, flags); @@ -1345,7 +1344,7 @@ send_group_sigqueue(int sig, struct sigq __group_complete_signal(sig, p); spin_unlock_irqrestore(&p->sighand->siglock, flags); - read_unlock(&tasklist_lock); + return ret; }
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