[RFC] [PATCH] Re: [libvirt] race between qemu monitor startup and blocking migrate -incoming

Charles Duffy Charles_Duffy at messageone.com
Thu Nov 19 01:01:08 UTC 2009

[ This is also filed in Red Hat's bugzilla at 
https://bugzilla.redhat.com/show_bug.cgi?id=537938 ]

In cases where compression is in use, putting the waitpid() for the 
decompression tool before the qemudWaitForMonitor() call appears to 
eliminate the race in question.

As much of a cheap hack as it is, it seems like it would resolve the 
race condition in question to always spawn and block on an intermediate 
process, even if this means having *two* "cat" processes between 
libvirtd and the qemu or kvm it is starting.

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