From: Matthew Garrett <mjg59@srcf.ucam.org>
To: "Ortwin Glück" <odi@odi.ch>
Cc: linux-kernel@vger.kernel.org
Subject: Re: freeze when strace X
Date: Wed, 9 Jun 2010 21:06:10 +0100 [thread overview]
Message-ID: <20100609200610.GA27536@srcf.ucam.org> (raw)
In-Reply-To: <4C0FF34D.6090800@odi.ch>
On Wed, Jun 09, 2010 at 10:02:21PM +0200, Ortwin Glück wrote:
> On 09.06.2010 21:52, Matthew Garrett wrote:
> > Just to make sure, you're not trying to strace X from within X, are you?
>
> Oh... now that you mention it... Is that a silly thing to do?
> strace X from a different terminal works fine :-)
>
> But freezing the system because of that? I mean an error message, log, anything
> would be "nice".
strace needs to output text via X, which generates output which needs to
be output via X... and you'll tend to deadlock. If X is holding any
interesting kernel locks at that point then it wouldn't surprise me if
the machine ends up dead.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2010-06-09 20:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-09 18:38 freeze when strace X Ortwin Glück
2010-06-09 19:52 ` Matthew Garrett
2010-06-09 20:02 ` Ortwin Glück
2010-06-09 20:06 ` Matthew Garrett [this message]
2010-06-09 20:26 ` Ortwin Glück
2010-06-09 20:47 ` Thomas Gleixner
2010-06-09 20:53 ` Matthew Garrett
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