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From: John Garry <john.garry@huawei.com>
To: <axboe@kernel.dk>, <ming.lei@redhat.com>
Cc: <linux-kernel@vger.kernel.org>, <linux-block@vger.kernel.org>,
	<linux-scsi@vger.kernel.org>
Subject: Re: [PATCH RESEND v3 00/13] blk-mq: Reduce static requests memory footprint for shared sbitmap
Date: Mon, 20 Sep 2021 08:45:04 +0100	[thread overview]
Message-ID: <e5f92ab5-eddd-eaed-3b3c-29b5bc60f0e6@huawei.com> (raw)
In-Reply-To: <1631545950-56586-1-git-send-email-john.garry@huawei.com>

On 13/09/2021 16:12, John Garry wrote:
> Currently a full set of static requests are allocated per hw queue per
> tagset when shared sbitmap is used.
> 
> However, only tagset->queue_depth number of requests may be active at
> any given time. As such, only tagset->queue_depth number of static
> requests are required.
> 
> The same goes for using an IO scheduler, which allocates a full set of
> static requests per hw queue per request queue.
> 
> This series changes shared sbitmap support by using a shared tags per
> tagset and request queue. Ming suggested something along those lines in
> v1 review. But we'll keep name "shared sbitmap" name as it is familiar. In
> using a shared tags, the static rqs also become shared, reducing the
> number of sets of static rqs, reducing memory usage.

Hi Ming,

Could you kindly check the remaining few un-reviewed patches in this 
series when you get an opportunity?

Thanks,
John

      parent reply	other threads:[~2021-09-20  7:41 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-13 15:12 John Garry
2021-09-13 15:12 ` [PATCH RESEND v3 01/13] blk-mq: Change rqs check in blk_mq_free_rqs() John Garry
2021-09-14  5:35   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 02/13] block: Rename BLKDEV_MAX_RQ -> BLKDEV_DEFAULT_RQ John Garry
2021-09-14  5:36   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 03/13] blk-mq: Relocate shared sbitmap resize in blk_mq_update_nr_requests() John Garry
2021-09-14  5:37   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 04/13] blk-mq: Invert check " John Garry
2021-09-14  5:38   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 05/13] blk-mq-sched: Rename blk_mq_sched_alloc_{tags -> map_and_rqs}() John Garry
2021-09-14  5:40   ` Hannes Reinecke
2021-09-14  8:10     ` John Garry
2021-09-13 15:12 ` [PATCH RESEND v3 06/13] blk-mq-sched: Rename blk_mq_sched_free_{requests -> rqs}() John Garry
2021-09-14  5:41   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 07/13] blk-mq: Pass driver tags to blk_mq_clear_rq_mapping() John Garry
2021-09-14  5:44   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 08/13] blk-mq: Don't clear driver tags own mapping John Garry
2021-09-14  5:45   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 09/13] blk-mq: Add blk_mq_tag_update_sched_shared_sbitmap() John Garry
2021-09-14  5:46   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 10/13] blk-mq: Add blk_mq_alloc_map_and_rqs() John Garry
2021-09-14  5:48   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 11/13] blk-mq: Refactor and rename blk_mq_free_map_and_{requests->rqs}() John Garry
2021-09-14  5:50   ` Hannes Reinecke
2021-09-13 15:12 ` [PATCH RESEND v3 12/13] blk-mq: Use shared tags for shared sbitmap support John Garry
2021-09-14  6:04   ` Hannes Reinecke
2021-09-14  8:27     ` John Garry
2021-09-13 15:12 ` [PATCH RESEND v3 13/13] blk-mq: Stop using pointers for blk_mq_tags bitmap tags John Garry
2021-09-14  6:05   ` Hannes Reinecke
2021-09-20  7:45 ` John Garry [this message]

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