[CentOS-virt] Tapdisk processes being left behind when hvm domu's migrate/shutdown

Fri Mar 13 14:20:21 UTC 2015
George Dunlap <dunlapg at umich.edu>

On Thu, Mar 12, 2015 at 6:56 PM, George Dunlap <dunlapg at umich.edu> wrote:
> On Thu, Mar 12, 2015 at 6:11 PM, Nathan March <nathan at gt.net> wrote:
>> Hi All,
>> I'm seeing tapdisk processes not being terminated after a HVM vm is shutdown
>> or migrated away. I don't see this problem with linux paravirt domu's, just
>> windows hvm ones.
> Interesting -- actually you get the same effect just starting and
> shutting down a guest.  It creates two tapdisk processes, but on
> shutdown only destroys one.
> I'll look into it.

OK, this turns out to be a bug in the patch on the patchqueue used to
import XenServers "blktap 2.5".  Let me see if I can work up a quick
fix... otherwise it may have to wait until I get a chance to integrate
blktap 2.5 properly upstream.