From: Lee Revell <rlrevell@joe-job.com>
To: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Andrew Morton <akpm@osdl.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Ingo Molnar <mingo@elte.hu>,
"Paul E. McKenney" <paulmck@us.ibm.com>,
Roland McGrath <roland@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/4] coredump: speedup SIGKILL sending
Date: Fri, 07 Apr 2006 15:42:47 -0400 [thread overview]
Message-ID: <1144438967.22490.90.camel@mindpipe> (raw)
In-Reply-To: <20060407232838.GA11460@oleg>
On Sat, 2006-04-08 at 03:28 +0400, Oleg Nesterov wrote:
> zap_process() disables irqs while traversing ->thread_group list.
> So yes, if a process has a lot of threads it will be a latency regression.
> (but again, __group_complete_signal() does the same while delivering this
> signal, so I don't think this change can make things worse).
>
> However this allows us to avoid tasklist_lock in zap_threads() so I think
> it is worth it. Please note that tasklist_lock was held while iterating
> over _all_ threads in system, not only current's thread group.
>
OK sounds good.
Lee
next prev parent reply other threads:[~2006-04-07 19:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-06 22:06 [PATCH 2/4] coredump: speedup SIGKILL sending Oleg Nesterov
2006-04-06 19:45 ` Lee Revell
2006-04-06 23:55 ` Oleg Nesterov
2006-04-06 20:07 ` Lee Revell
2006-04-07 23:28 ` Oleg Nesterov
2006-04-07 19:42 ` Lee Revell [this message]
2006-04-10 4:11 ` Roland McGrath
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