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Date: Tue, 24 Sep 2013 14:43:40 +0200
From: Stefan Hajnoczi <stefanha@gmail.com>
Message-ID: <20130924124340.GA12579@stefanha-thinkpad.redhat.com>
References: <1379947014-14216-1-git-send-email-borntraeger@de.ibm.com>
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In-Reply-To: <1379947014-14216-1-git-send-email-borntraeger@de.ibm.com>
Subject: Re: [Qemu-devel] [PATCH] tracing: start trace processing thread in
 final child process
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To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: qemu-devel@nongnu.org, =?iso-8859-1?Q?Llu=EDs?= <xscript@gmx.net>, Michael Mueller <mimu@linux.vnet.ibm.com>

On Mon, Sep 23, 2013 at 04:36:54PM +0200, Christian Borntraeger wrote:
> From: Michael Mueller <mimu@linux.vnet.ibm.com>
> 
> When running with trace backend e.g. "simple" the writer thread needs to be
> implemented in the same process context as the trace points that will be
> processed. Under libvirtd control, qemu gets first started in daemonized
> mode to privide its capabilities. Creating the writer thread in the initial
> process context then leads to a dead lock because the thread gets termined
> together with the initial parent. (-daemonize)
> 
> Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
> [minor whitespace fixes]
> ---
>  vl.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)

Thanks, applied to my tracing tree:
https://github.com/stefanha/qemu/commits/tracing

Stefan