Re: [PATCH] block: mq flush: fix race between IPI handler and mq flush worker

[Ming Lei]

On Wed, May 28, 2014 at 3:35 AM, Jens Axboe <axboe@xxxxxxxxx> wrote:
> On 05/27/2014 01:21 PM, Christoph Hellwig wrote:
>> On Tue, May 27, 2014 at 01:17:40PM -0600, Jens Axboe wrote:
>>> But I think you sent the old one again, not the new variant :-)
>>
>> Oh well, next try:
>
> This looks good to me. Was trying to think of ways to reduce that to one
> list iteration, but I think it's cleaner to just retain the two separate
> ones.
>
> Reusing REQ_SOFTBARRIER is fine as well, not used in blk-mq otherwise.
>
> Let me know when you have runtime verified it.

Looks writing over ext4(especially sync writing) can survive
with Christoph's patch now, thanks Christoph.

Reported-and-tested-by: Ming Lei <tom.leiming@xxxxxxxxx>


Thanks,
-- 
Ming Lei
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/