From: Thomas Gleixner <tglx@linutronix.de>
To: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Ulrich Drepper <drepper@redhat.com>
Subject: Re: [RFC][PATCH] muptiple bugs in PI futexes
Date: Tue, 05 Jun 2007 23:13:06 +0200 [thread overview]
Message-ID: <1181077986.4404.165.camel@chaos> (raw)
In-Reply-To: <20070605210028.GA10084@ms2.inr.ac.ru>
On Wed, 2007-06-06 at 01:00 +0400, Alexey Kuznetsov wrote:
> Hello!
>
> > We actually need to do something about this, as we might loop for ever
> > there. The robust cleanup code can fail (e.g. due to list corruption)
> > and we would see exit_state != 0 and the OWNER_DIED bit would never be
> > set, so we are stuck in a busy loop.
>
> Yes...
>
> It is possible to take read_lock(&tasklist_lock) before:
We really want to avoid the tasklist_lock at all. It's not trivial, but
I think it's doable. I send you a patch to test tomorrow morning when my
brain recovered from looking at that code :)
tglx
prev parent reply other threads:[~2007-06-05 21:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-07 14:43 [RFC][PATCH] muptiple bugs in PI futexes Alexey Kuznetsov
2007-05-23 7:26 ` Ingo Molnar
2007-05-23 11:51 ` Alexey Kuznetsov
2007-06-05 16:25 ` Thomas Gleixner
2007-06-05 17:39 ` Alexey Kuznetsov
2007-06-05 18:48 ` Thomas Gleixner
2007-06-05 19:15 ` Thomas Gleixner
2007-06-05 21:00 ` Alexey Kuznetsov
2007-06-05 21:13 ` Thomas Gleixner [this message]
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