From: John Garry <john.garry@huawei.com>
To: Ming Lei <ming.lei@redhat.com>
Cc: <axboe@kernel.dk>, <jejb@linux.ibm.com>,
<martin.petersen@oracle.com>, <linux-block@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-scsi@vger.kernel.org>,
<kashyap.desai@broadcom.com>, <hare@suse.de>
Subject: Re: [PATCH v2 06/11] blk-mq: Pass driver tags to blk_mq_clear_rq_mapping()
Date: Thu, 19 Aug 2021 08:32:20 +0100 [thread overview]
Message-ID: <c957c544-4040-e462-47f6-3514ab3da617@huawei.com> (raw)
In-Reply-To: <YR2oO8hhtDx1Wd+P@T590>
On 19/08/2021 01:39, Ming Lei wrote:
>> That's intentional, as we have from later patch:
>>
>> void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
>> unsigned int hctx_idx)
>> {
>> struct blk_mq_tags *drv_tags;
>> struct page *page;
>>
>> + if (blk_mq_is_sbitmap_shared(set->flags))
>> + drv_tags = set->shared_sbitmap_tags;
>> + else
>> drv_tags = set->tags[hctx_idx];
>>
>> ...
>>
>> blk_mq_clear_rq_mapping(drv_tags, tags);
>>
>> }
>>
>> And it's just nice to not re-indent later.
> But this way is weird, and I don't think checkpatch.pl is happy with
> it.
There is the idea to try to not remove/change code earlier in a series -
I am taking it to an extreme! I can stop.
On another related topic, how about this change also:
---8<---
void blk_mq_clear_rq_mapping(struct blk_mq_tags *drv_tags,
struct blk_mq_tags *tags)
{
+ /* There is no need to clear a driver tags own mapping */
+ if (drv_tags == tags)
+ return;
--->8---
Thanks,
John
next prev parent reply other threads:[~2021-08-19 7:32 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 14:29 [PATCH v2 00/11] blk-mq: Reduce static requests memory footprint for shared sbitmap John Garry
2021-08-09 14:29 ` [PATCH v2 01/11] blk-mq: Change rqs check in blk_mq_free_rqs() John Garry
2021-08-09 14:29 ` [PATCH v2 02/11] block: Rename BLKDEV_MAX_RQ -> BLKDEV_DEFAULT_RQ John Garry
2021-08-09 14:29 ` [PATCH v2 03/11] blk-mq: Relocate shared sbitmap resize in blk_mq_update_nr_requests() John Garry
2021-08-18 3:49 ` Ming Lei
2021-08-09 14:29 ` [PATCH v2 04/11] blk-mq: Invert check " John Garry
2021-08-18 3:53 ` Ming Lei
2021-08-09 14:29 ` [PATCH v2 05/11] blk-mq-sched: Rename blk_mq_sched_alloc_{tags -> map_and_request}() John Garry
2021-08-18 3:55 ` Ming Lei
2021-08-09 14:29 ` [PATCH v2 06/11] blk-mq: Pass driver tags to blk_mq_clear_rq_mapping() John Garry
2021-08-09 17:00 ` kernel test robot
2021-08-09 17:10 ` John Garry
2021-08-09 19:55 ` kernel test robot
2021-08-18 4:02 ` Ming Lei
2021-08-18 12:00 ` John Garry
2021-08-19 0:39 ` Ming Lei
2021-08-19 7:32 ` John Garry [this message]
2021-08-23 2:59 ` Ming Lei
2021-08-09 14:29 ` [PATCH v2 07/11] blk-mq: Add blk_mq_tag_update_sched_shared_sbitmap() John Garry
2021-08-18 7:28 ` Ming Lei
2021-08-09 14:29 ` [PATCH v2 08/11] blk-mq: Add blk_mq_ops.init_request_no_hctx() John Garry
2021-08-18 7:38 ` Ming Lei
2021-08-18 8:46 ` John Garry
2021-08-09 14:29 ` [PATCH v2 09/11] scsi: Set blk_mq_ops.init_request_no_hctx John Garry
2021-08-09 14:29 ` [PATCH v2 10/11] blk-mq: Use shared tags for shared sbitmap support John Garry
2021-08-18 8:16 ` Ming Lei
2021-08-18 14:18 ` John Garry
2021-08-23 8:55 ` John Garry
2021-08-09 14:29 ` [PATCH v2 11/11] blk-mq: Stop using pointers for blk_mq_tags bitmap tags John Garry
2021-08-18 8:18 ` Ming Lei
2021-08-17 7:02 ` [PATCH v2 00/11] blk-mq: Reduce static requests memory footprint for shared sbitmap John Garry
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