Re: [Qemu-devel] [PATCH] block/throttle: Use host clock type

[Kevin Wolf]

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 <address@hidden>

This breaks qemu-iotests 093. Dropped it again from the block branch.

Kevin