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xen-devel
Re: [Xen-devel] earlier remove the backend of tapdisk device in xenstore
Jim Fehlig wrote:
>
>>Agreed. qemu-dm should clean up these resources on shutdown. AFAICT,
>>it currently relies on receiving CTRMSG_CLOSE from blktapctrl (see
>>ioemu-dir/hw/xen_blktap.c), which it may never receive before exiting.
>
> No, I don't think so. The root cause in this issue is qemu-dm exit too
> earlier.
> Qemu-dm has been destroyed before blktapctrl send "CTRMSG_CLOSE",
> moreover, removing the backend node in xenstore trigers the callback in
> blktapctrl to send "CTRMSG_CLOSE".
> It's xend to decide who ought to be occured earlier between sending SIGHUP
> to qemu-dm and removing the backend node in xenstore. Obviously, xend is
> the role of manager. So I think fix this issue in xend is appropriate.
> In addition, If we really want to fix it in qemu, we have to intercept
> the exit signal sent by kill() in xend. I don't think intercept this
> singal in qemu for this point is proper.
>
> -Jame (Song Wei)
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>
>
--
View this message in context:
http://old.nabble.com/earlier-remove-the-backend-of-tapdisk-device-in-xenstore-to-release-the-resource-allocated-in-backend-driver-lies-in-dom0%27kernel-tp28325456p28336546.html
Sent from the Xen - Dev mailing list archive at Nabble.com.
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