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From: Roland McGrath <roland@redhat.com>
To: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Ingo Molnar <mingo@elte.hu>, Frank Mayhar <fmayhar@google.com>,
	linux-kernel@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 2.6.27-rc5] Fix itimer/many thread hang.
Date: Tue,  9 Sep 2008 21:04:04 -0700 (PDT)	[thread overview]
Message-ID: <20080910040404.245301541FE@magilla.localdomain> (raw)
In-Reply-To: Oleg Nesterov's message of  Tuesday, 9 September 2008 20:01:52 +0400 <20080909160152.GA714@tv-sign.ru>

> As for this particular function, it seems to me that ->signal == NULL
> is not possible, no?

The concern is to make sure that the timer tick path is always safe for a
tick that hits during release_task(current) in exit_notify().  A timer tick
there can come with current->signal == NULL.  We just need to make sure one
way or another that this is safe.


Thanks,
Roland

  parent reply	other threads:[~2008-09-10  4:06 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-08 20:44 Frank Mayhar
2008-09-09  7:03 ` Ingo Molnar
2008-09-09 16:01   ` Oleg Nesterov
2008-09-09 16:13     ` Oleg Nesterov
2008-09-09 20:29     ` Frank Mayhar
2008-09-10 12:12       ` Oleg Nesterov
2008-09-10 17:50         ` Frank Mayhar
2008-09-10 16:32       ` Oleg Nesterov
2008-09-10  4:04     ` Roland McGrath [this message]
2008-09-10 11:44       ` Oleg Nesterov
2008-09-10  3:59 ` Roland McGrath

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