From: Damien Le Moal <damien.lemoal@opensource.wdc.com>
To: Ming Lei <ming.lei@redhat.com>
Cc: Bart Van Assche <bvanassche@acm.org>,
Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>,
Christoph Hellwig <hch@lst.de>, Jan Kara <jack@suse.cz>,
Johannes Thumshirn <johannes.thumshirn@wdc.com>
Subject: Re: [PATCH 2/2] block: Split and submit bios in LBA order
Date: Tue, 21 Mar 2023 17:51:29 +0900 [thread overview]
Message-ID: <cbf73fed-265f-b244-608c-bfcf5c1b6d4d@opensource.wdc.com> (raw)
In-Reply-To: <ZBlkF7zjQyahk5gv@ovpn-8-18.pek2.redhat.com>
On 3/21/23 17:00, Ming Lei wrote:
>>> But I guess it is hard to maintain bio order, especially md/dm is
>>> involved.
>>
>> It is not that hard once you get rid of plugging, which we did. So far, with
>> everything we support, we are not detecting any issues and we test weekly, every rc.
>
> I see, but I meant current->bio_list, see the following bio order issue:
>
> https://lore.kernel.org/linux-block/1609233522-25837-1-git-send-email-dannyshih@synology.com/
Interesting. We have never seen such issue in practice with the device mappers
that support zoned devices. But it seems interesting to try to find a use case
that could trigger this. Will look into it, and if everything is fixed, it would
still be a good regression test for blocktest.
--
Damien Le Moal
Western Digital Research
next prev parent reply other threads:[~2023-03-21 8:56 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-17 19:59 [PATCH 0/2] Submit split bios in LBA order Bart Van Assche
2023-03-17 19:59 ` [PATCH 1/2] block: Split blk_recalc_rq_segments() Bart Van Assche
2023-03-18 6:38 ` Christoph Hellwig
2023-03-17 19:59 ` [PATCH 2/2] block: Split and submit bios in LBA order Bart Van Assche
2023-03-17 22:28 ` Jan Kara
2023-03-18 6:33 ` Christoph Hellwig
2023-03-17 23:38 ` Ming Lei
2023-03-17 23:45 ` Bart Van Assche
2023-03-20 23:28 ` Ming Lei
2023-03-20 23:32 ` Bart Van Assche
2023-03-21 0:44 ` Ming Lei
2023-03-21 1:46 ` Damien Le Moal
2023-03-21 2:17 ` Ming Lei
2023-03-21 3:24 ` Damien Le Moal
2023-03-21 8:00 ` Ming Lei
2023-03-21 8:51 ` Damien Le Moal [this message]
2023-03-21 9:09 ` Christoph Hellwig
2023-03-21 9:50 ` Damien Le Moal
2023-03-21 5:55 ` Christoph Hellwig
2023-03-21 14:36 ` Bart Van Assche
2023-03-23 8:26 ` Christoph Hellwig
2023-03-23 10:28 ` Damien Le Moal
2023-03-23 16:27 ` Bart Van Assche
2023-03-23 22:53 ` Damien Le Moal
2023-03-24 16:55 ` Bart Van Assche
2023-03-25 2:00 ` Damien Le Moal
2023-03-25 16:31 ` Bart Van Assche
2023-03-26 1:45 ` Damien Le Moal
2023-03-26 23:45 ` Christoph Hellwig
2023-03-27 21:06 ` Bart Van Assche
2023-03-27 23:43 ` Christoph Hellwig
2023-04-06 20:30 ` Bart Van Assche
2023-03-27 21:20 ` Bart Van Assche
2023-03-18 6:42 ` Christoph Hellwig
2023-03-18 6:29 ` [PATCH 0/2] Submit split " Christoph Hellwig
2023-03-20 17:22 ` Bart Van Assche
2023-03-20 21:06 ` Khazhy Kumykov
2023-03-23 8:27 ` Christoph Hellwig
2023-03-24 17:05 ` Bart Van Assche
2023-03-25 2:15 ` Damien Le Moal
2023-03-26 23:42 ` Christoph Hellwig
2023-03-26 23:44 ` Christoph Hellwig
2023-04-06 20:32 ` Bart Van Assche
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