Re: [Qemu-devel] [PATCH v3 2/2] block: disable I/O throttling on sync api

[Zhi Yong Wu]

On Fri, Mar 30, 2012 at 6:29 PM, Stefan Hajnoczi <address@hidden> wrote:
> On Fri, Mar 30, 2012 at 9:50 AM,  <address@hidden> wrote:
>> +     * When all sync I/O drivers are converted to async I/O, it will be 
>> restored
>> +     * to the original state.
>
> The problem here is that guess_disk_lchs() uses bdrv_read(), not
> whether device emulation uses sync or async I/O.  Converting devices
> to async I/O will not fix this.
Yeah, but when all sync emulated devices drivers are converted to
async mode, the code change need to be rolled back. This is what i
mean.
>
> Stefan



-- 
Regards,

Zhi Yong Wu