Re: [Qemu-devel] [Qemu-block] [PATCH 6/7] qemu-iotests: 141: reduce likelihood of race condition on systems with fast IO

[Kevin Wolf]

Am 07.04.2016 um 22:27 hat Sascha Silbe geschrieben:
> Dear Max,
> 
> Max Reitz <address@hidden> writes:
> 
> > On 05.04.2016 11:21, Sascha Silbe wrote:
> >> On systems with fast IO, qemu-io may write more than 1 MiB before
> >> receiving the block-job-cancel command, causing the test case to fail.
> >> 
> >> 141 is inherently racy, but we can at least reduce the likelihood of the
> >> job completing before the cancel command arrives by bumping the size of
> >> the data getting written; we'll try 32 MiB for a start.
> >
> > Hm, interesting. I tried to prevent this by setting the block jobs'
> > speed to 1, which should make it stop after the block job has processed
> > the first block of data.
> 
> Hmm, seems like I didn't quite understand the way the test works
> then.
> 
> @Kevin: Please do NOT queue this patch.

No problem. I expect this series to go through Max's tree anyway.

Kevin