Subject: Re: x86: only single-step into signal handlers if the tracer
From: Alexander Nyberg <alexn@dsv.su.se>
To: Andrew Morton <akpm@osdl.org>
Cc: Jeff Garzik <jgarzik@pobox.com>, linux-kernel@vger.kernel.org,
       torvalds@osdl.org
In-Reply-To: <20041114184456.6bfd07d3.akpm@osdl.org>
References: <200411150203.iAF23Trb024677@hera.kernel.org>
	 <41981266.2070707@pobox.com>  <20041114184456.6bfd07d3.akpm@osdl.org>
Content-Type: text/plain
Date: Mon, 15 Nov 2004 13:10:49 +0100
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> > This reminds me of a problem I am seeing under recent -bk kernels.
> > 
> > Mozilla (FC2) will freeze (no screen redraws, etc.).  'ps xf' shows 
> > mozilla sleeping.  If I strace the process, Mozilla will un-freeze and 
> > continue as expected.
> > 
> 
> Presumably the futex thing:
> 

This patch seems to fix it for me, recently various programs have got
stuck in pthread_condition_wait (this on x86-64).

When that happened I did gdb --pid and then 'continue' which made it
wake up.

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