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Re: [libvirt] [PATCH] Release VM lock before acquiring virDomainObjListPtr lock



On 04/09/2013 03:08 AM, Daniel P. Berrange wrote:
> 
>> I'm trying to understand what the behavior was before this patch went in.
> 
> Well this was just fixing a deadlock introduced in a previous patch.
> You need to look further back than just this patch. Originally the
> global QEMU driver lock would be held preventing any kind of concurrent
> execution.

In fact, my testing said that this patch, in isolation, merely set up a
latent bug, but did not cause a crash, precisely because back at that
time in history, we were still being protected by the big qemu driver
lock.  I'm still bisecting, though, to determine _which_ patch finally
allowed this latent issue to finally crash libvirtd.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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