From: Eric Blake <eblake@redhat.com>
To: Stefan Hajnoczi <stefanha@redhat.com>, qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
Anthony Liguori <aliguori@amazon.com>
Subject: Re: [Qemu-devel] [PULL 1/4] tracing: start trace processing thread in final child process
Date: Mon, 27 Jan 2014 12:25:07 -0700 [thread overview]
Message-ID: <52E6B293.6020500@redhat.com> (raw)
In-Reply-To: <1390834386-23139-2-git-send-email-stefanha@redhat.com>
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On 01/27/2014 07:53 AM, Stefan Hajnoczi 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
s/privide/provide/
> process context then leads to a dead lock because the thread gets termined
s/dead lock/deadlock/
s/termined/terminated/
> 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]
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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next prev parent reply other threads:[~2014-01-27 19:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-27 14:53 [Qemu-devel] [PULL 0/4] Tracing patches Stefan Hajnoczi
2014-01-27 14:53 ` [Qemu-devel] [PULL 1/4] tracing: start trace processing thread in final child process Stefan Hajnoczi
2014-01-27 19:25 ` Eric Blake [this message]
2014-01-27 14:53 ` [Qemu-devel] [PULL 2/4] trace: [simple] Do not include "trace/simple.h" in generated tracer headers Stefan Hajnoczi
2014-01-27 14:53 ` [Qemu-devel] [PULL 3/4] trace: add glib 2.32+ static GMutex support Stefan Hajnoczi
2014-01-27 15:15 ` Daniel P. Berrange
2014-01-28 12:01 ` Stefan Hajnoczi
2014-01-27 14:53 ` [Qemu-devel] [PULL 4/4] trace: fix simple trace "disable" keyword Stefan Hajnoczi
2014-01-31 11:22 ` [Qemu-devel] [PULL 0/4] Tracing patches Peter Maydell
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