From: Andi Kleen <ak@suse.de>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: pavel@suse.cz, LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH -rt] race condition in fs/compat.c with compat_sys_ioctl
Date: 16 Nov 2005 06:55:28 +0100 [thread overview]
Message-ID: <p73y83pp25r.fsf@verdi.suse.de> (raw)
In-Reply-To: <1132115386.5047.61.camel@localhost.localdomain>
Steven Rostedt <rostedt@goodmis.org> writes:
>
> That's the problem. I found out that one ioctl might sleep holding the
> sem and won't be woken up until another process calls another ioctl to
> wake it up. But unfortunately, the one waking up the sleeper will block
> on the sem. (the killer was tty_wait_until_sent)
You should have looked into mainline first. The semaphore is already gone
because it wasn't even needed anymore.
-Andi
next prev parent reply other threads:[~2005-11-16 5:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
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[not found] ` <5bdc1c8b0511121725u6df7ad9csb9cb56777fa6fe64@mail.gmail.com>
[not found] ` <Pine.LNX.4.58.0511122149020.25152@localhost.localdomain>
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2005-11-16 4:29 ` [PATCH -rt] race condition in fs/compat.c with compat_sys_ioctl Steven Rostedt
2005-11-16 5:55 ` Andi Kleen [this message]
2005-11-16 8:33 ` Ingo Molnar
2005-11-16 9:46 ` Steven Rostedt
2005-11-16 10:03 ` Ingo Molnar
2005-11-16 8:32 ` Ingo Molnar
2005-11-16 9:40 ` Steven Rostedt
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