From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Subject: virsh dump blocking problem
Date: Tue, 06 Apr 2010 09:35:09 +0800
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Hi all,

I'm not sure whether it's appropriate to post the problem here.
I played with "virsh" under Fedora 12, and started a KVM fedora12 guest
by "virsh start" command. The fedora12 guest is successfully started.
Than I run the following command to dump the guest core:
#virsh dump 1 mycoredump             (domain id is 1)

This command seemed blocking and not return. According to he strace
output, virsh dump seems that it's blocking at poll() call. I think
the following should be the call trace of virsh.

cmdDump()    
  -> virDomainCoreDump()
    -> remoteDomainCoreDump()
         -> call()
             -> remoteIO()
                 -> remoteIOEventLoop()
                      -> poll(fds, ARRAY_CARDINALITY(fds), -1)


Any one encounters this problem also, any thoughts?

Thanks
Gui