Re: [Qemu-devel] [v8 Patch 0/6]Qemu: Host pagecache setting from cmdline and monitor

[Zhi Yong Wu <zwu.kernel@gmail.com>]

On Mon, Nov 7, 2011 at 4:38 PM, Supriya Kannery
<supriyak@linux.vnet.ibm.com> wrote:
> On 11/04/2011 07:59 AM, Zhi Yong Wu wrote:
>>
>> On Sun, Oct 30, 2011 at 6:33 PM, Supriya Kannery
>> <supriyak@linux.vnet.ibm.com>  wrote:
>>>
>>> Currently cache setting of a block device cannot be changed
>>> without restarting a running VM. Following patchset is for
>>> enabling dynamic change of cache setting for block devices
>>> through qemu monitor. Code changes are based on patches
>>> from Christoph Hellwig and Prerna Saxena.
>>>
>>> This patchset introduces
>>> a. monitor command 'block_set_hostcache' using which host
>>>   pagecache setting for a block device can be changed
>>>   dynamically.
>>
>> I got a bit confusion. Is it used to change host pagecache setting on
>> hyperviser or on guest?
>> This block device said by you is for guest, right?
>>
>
>  This command is used for changing pagecache setting of
> the image files in host which are acting as block devices
> for guest.
So what is the difference between it and cache option?

>
> -thanks, Supriya
>
>



-- 
Regards,

Zhi Yong Wu