Re: [Qemu-devel] [PATCH] qed: replace vm_clock with rt_clock for qemu-tool compatibility

[Zhi Yong Wu]

On Mon, Feb 27, 2012 at 10:41 PM, Stefan Hajnoczi <address@hidden> wrote:
> On Mon, Feb 27, 2012 at 2:20 PM, Zhi Yong Wu <address@hidden> wrote:
>> On Sun, Feb 26, 2012 at 10:55 PM, Stefan Hajnoczi
>> <address@hidden> wrote:
>>> The QED dirty bit timer marks the file clean after allocating writes
>>> have drained.  This is cheaper than clearing/setting the dirty bit on
>>> each allocating write because the timer introduces a grace period which
>>> can be extended if more allocating writes arrive.
>>>
>>> The vm_clock was used in an attempt to prevent modifying the image file
>> Why can vm_clock do this work but other clock can not? If you're
>> available, can you elaborate what the difference among the three
>> clocks is? such as vm_clock, rt_clock, and host_clock.
>
> See qemu-timer.h.
thanks
>
> Stefan



-- 
Regards,

Zhi Yong Wu