From: Oleg Nesterov <oleg@tv-sign.ru>
To: Roland McGrath <roland@redhat.com>
Cc: Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
john stultz <johnstul@us.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
Steven Rostedt <rostedt@goodmis.org>,
Chris Wright <chrisw@osdl.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] arm_timer: remove a racy and obsolete PF_EXITING check
Date: Tue, 20 Jun 2006 03:28:56 +0400 [thread overview]
Message-ID: <20060619232856.GA88@oleg> (raw)
In-Reply-To: <20060619080656.42097180049@magilla.sf.frob.com>
On 06/19, Roland McGrath wrote:
>
> > However, for some reason it does so only for CPUCLOCK_PERTHREAD
> > case (which is imho wrong).
>
> For a process CPU clock timer, ->it.cpu.task is the thread group leader.
> The group leader can exit and will be a lingering zombie for as long as
> other threads in the group live. The process timers need to keep getting
> armed and working both during and after the group leader's exit processing.
Ah, yes. Also, I missed the fact that process_timer_rebalance() checks
PF_EXITING anyway (For a process CPU clock timer), so I was wrong twice.
Thanks!
Oleg.
prev parent reply other threads:[~2006-06-19 19:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-15 16:12 [PATCH 3/3] arm_timer: remove a racy and obsolete PF_EXITING check Oleg Nesterov
2006-06-19 8:06 ` Roland McGrath
2006-06-19 23:28 ` Oleg Nesterov [this message]
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