Am 13.03.2015 um 07:35 hat Fam Zheng geschrieben: > Throttle timers won't make any progress when VCPU is not running, which > is prone to stall the request queue in cases like utils, qtest, > suspending, and live migration, unless carefully handled. What we do now > is crude. For example in bdrv_drain_all, requests are resumed > immediately without consulting throttling timer. Unfortunately > bdrv_drain_all is so widely used that there may be too many holes that > guest could bypass throttling. > > If we use the host clock, we can just trust the nested poll when waiting > for requests. > > Signed-off-by: Fam Zheng <f...@redhat.com>
This breaks qemu-iotests 093. Dropped it again from the block branch. Kevin
