From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
Oleksandr Natalenko <oleksandr@natalenko.name>
Subject: Re: [PATCH] block: return ELEVATOR_DISCARD_MERGE if possible
Date: Thu, 5 Aug 2021 11:35:00 +0800 [thread overview]
Message-ID: <YQtcZHgE1cTl+KVz@T590> (raw)
In-Reply-To: <20210729034226.1591070-1-ming.lei@redhat.com>
On Thu, Jul 29, 2021 at 11:42:26AM +0800, Ming Lei wrote:
> When merging one bio to request, if they are discard IO and the queue
> supports multi-range discard, we need to return ELEVATOR_DISCARD_MERGE
> because both block core and related drivers(nvme, virtio-blk) doesn't
> handle mixed discard io merge(traditional IO merge together with
> discard merge) well.
>
> Fix the issue by returning ELEVATOR_DISCARD_MERGE in this situation,
> so both blk-mq and drivers just need to handle multi-range discard.
>
> Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name>
> Signed-off-by: Ming Lei <ming.lei@redhat.com>
Hello Jens and Guys,
Ping...
Thanks,
Ming
next prev parent reply other threads:[~2021-08-05 3:35 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-29 3:42 [PATCH] block: return ELEVATOR_DISCARD_MERGE if possible Ming Lei
2021-07-29 7:17 ` Oleksandr Natalenko
2021-07-29 9:18 ` Ming Lei
2021-08-05 3:35 ` Ming Lei [this message]
2021-08-09 20:30 ` Oleksandr Natalenko
2021-08-09 20:36 ` Jens Axboe
2021-08-10 2:47 ` Ming Lei
2021-08-10 2:55 ` Jens Axboe
2021-08-10 3:28 ` Ming Lei
-- strict thread matches above, loose matches on Subject: below --
2022-05-21 18:56 Gwendal Grignou
2022-05-23 15:13 ` Greg KH
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