On 12/7/19 5:01 AM, Greg KH wrote:
> On Wed, Dec 04, 2019 at 08:53:43AM -0700, Jens Axboe wrote:
>> Hi,
>>
>> We have an issue with drains not working due to missing copy of some
>> state, it's affecting 5.2/5.3/5.4. I'm attaching the patch for 5.4,
>> however the patch should apply to 5.2 and 5.3 as well by just removing
>> the last hunk. The last hunk is touching the linked code, which was
>> introduced with 5.4.
>
> Does this match up with a patch in Linus's tree anywhere? Why is this a
> stable-only thing?
Because it was fixed as part of a cleanup series in mainline, before
anyone realized we had this issue. That removed the separate states
of ->index vs ->submit.sqe. That series is not something I was
comfortable putting into stable, hence the much simpler addition.
Here's the patch in the series that fixes the same issue:
commit cf6fd4bd559ee61a4454b161863c8de6f30f8dca
Author: Pavel Begunkov <asml.silence@xxxxxxxxx>
Date: Mon Nov 25 23:14:39 2019 +0300
io_uring: inline struct sqe_submit
--
Jens Axboe
