From: John Garry <john.garry@huawei.com>
To: Bart Van Assche <bvanassche@acm.org>,
Kashyap Desai <kashyap.desai@broadcom.com>,
Jens Axboe <axboe@kernel.dk>
Cc: <linux-block@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<ming.lei@redhat.com>, <hare@suse.de>,
<linux-scsi@vger.kernel.org>, Jan Kara <jack@suse.cz>
Subject: Re: [PATCH v5 00/14] blk-mq: Reduce static requests memory footprint for shared sbitmap
Date: Fri, 8 Oct 2021 09:07:25 +0100 [thread overview]
Message-ID: <0da031cb-427b-abd8-368d-d242e8c844c8@huawei.com> (raw)
In-Reply-To: <597c4cbe-ca6c-53e5-1139-be2ca0fbb677@acm.org>
On 08/10/2021 04:11, Bart Van Assche wrote:
+
> On 10/7/21 13:31, Kashyap Desai wrote:
>> I tested this patchset on 5.15-rc4 (master) -
>> https://github.com/torvalds/linux.git
>>
>> #1 I noticed some performance regression @mq-deadline scheduler which
>> is not
>> related to this series. I will bisect and get more detail about this
>> issue
>> separately.
>
> Please test this patch series on top of Jens' for-next branch
> (git://git.kernel.dk/linux-block). The mq-deadline performance on Jens'
> for-next branch should match that of kernel v5.13.
Kashyap did also mention earlier that he say the drop from v5.11 -> v5.12.
The only thing I saw possibly related there was Jan's work in
https://lore.kernel.org/linux-block/20210111164717.21937-1-jack@suse.cz/
to fix a performance regression witnessed on megaraid sas for slower media.
But I quite doubtful that this is the issue.
Thanks,
John
next prev parent reply other threads:[~2021-10-08 8:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-05 10:23 [PATCH v5 00/14] blk-mq: Reduce static requests memory footprint for shared sbitmap John Garry
2021-10-05 10:23 ` [PATCH v5 01/14] blk-mq: Change rqs check in blk_mq_free_rqs() John Garry
2021-10-05 10:23 ` [PATCH v5 02/14] block: Rename BLKDEV_MAX_RQ -> BLKDEV_DEFAULT_RQ John Garry
2021-10-05 10:23 ` [PATCH v5 03/14] blk-mq: Relocate shared sbitmap resize in blk_mq_update_nr_requests() John Garry
2021-10-05 10:23 ` [PATCH v5 04/14] blk-mq: Invert check " John Garry
2021-10-05 10:23 ` [PATCH v5 05/14] blk-mq-sched: Rename blk_mq_sched_alloc_{tags -> map_and_rqs}() John Garry
2021-10-05 10:23 ` [PATCH v5 06/14] blk-mq-sched: Rename blk_mq_sched_free_{requests -> rqs}() John Garry
2021-10-05 10:23 ` [PATCH v5 07/14] blk-mq: Pass driver tags to blk_mq_clear_rq_mapping() John Garry
2021-10-05 10:23 ` [PATCH v5 08/14] blk-mq: Don't clear driver tags own mapping John Garry
2021-10-05 10:23 ` [PATCH v5 09/14] blk-mq: Add blk_mq_tag_update_sched_shared_sbitmap() John Garry
2021-10-05 10:23 ` [PATCH v5 10/14] blk-mq: Add blk_mq_alloc_map_and_rqs() John Garry
2021-10-05 10:23 ` [PATCH v5 11/14] blk-mq: Refactor and rename blk_mq_free_map_and_{requests->rqs}() John Garry
2021-10-05 10:23 ` [PATCH v5 12/14] blk-mq: Use shared tags for shared sbitmap support John Garry
2021-10-05 10:23 ` [PATCH v5 13/14] blk-mq: Stop using pointers for blk_mq_tags bitmap tags John Garry
2021-10-05 10:23 ` [PATCH v5 14/14] blk-mq: Change shared sbitmap naming to shared tags John Garry
2021-10-05 12:35 ` [PATCH v5 00/14] blk-mq: Reduce static requests memory footprint for shared sbitmap Jens Axboe
2021-10-05 13:34 ` John Garry
2021-10-05 13:53 ` Kashyap Desai
2021-10-05 16:23 ` Jens Axboe
2021-10-07 20:31 ` Kashyap Desai
2021-10-08 3:11 ` Bart Van Assche
2021-10-08 8:07 ` John Garry [this message]
2021-10-08 10:17 ` John Garry
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