On 06/14/2016 09:25 AM, Denis V. Lunev wrote: > We should not take into account zero blocks for delay calculations. > They are not read and thus IO throttling is not required. In the > other case VM migration with 16 Tb QCOW2 disk with 4 Gb of data takes > days. > > Signed-off-by: Denis V. Lunev <d...@openvz.org> > Reviewed-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> > CC: Stefan Hajnoczi <stefa...@redhat.com> > CC: Fam Zheng <f...@redhat.com> > CC: Kevin Wolf <kw...@redhat.com> > CC: Max Reitz <mre...@redhat.com> > CC: Jeff Cody <jc...@redhat.com> > CC: Eric Blake <ebl...@redhat.com> > --- > block/mirror.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-)
Seems reasonable, but I'll let others more familiar with throttling give the final say. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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