From: Bart Van Assche <bvanassche@acm.org>
To: John Garry <john.garry@huawei.com>,
axboe@kernel.dk, damien.lemoal@opensource.wdc.com, hch@lst.de,
jejb@linux.ibm.com, martin.petersen@oracle.com, hare@suse.de,
satishkh@cisco.com, sebaddel@cisco.com, kartilak@cisco.com
Cc: linux-rdma@vger.kernel.org, linux-mmc@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org,
linux-scsi@vger.kernel.org, mpi3mr-linuxdrv.pdl@broadcom.com,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
nbd@other.debian.org
Subject: Re: [PATCH 5/5] blk-mq: Drop 'reserved' member of busy_tag_iter_fn
Date: Fri, 17 Jun 2022 09:33:11 -0700 [thread overview]
Message-ID: <017cae1e-b45f-04fd-d34c-22ae736b28e5@acm.org> (raw)
In-Reply-To: <1655463320-241202-6-git-send-email-john.garry@huawei.com>
On 6/17/22 03:55, John Garry wrote:
> We no longer use the 'reserved' member in for any iter function so it
^^^^^^
One of these two words probably should be removed.
> diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
> index 2dcd738c6952..b8cc8b41553f 100644
> --- a/block/blk-mq-tag.c
> +++ b/block/blk-mq-tag.c
> @@ -266,7 +266,6 @@ static bool bt_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
> struct blk_mq_hw_ctx *hctx = iter_data->hctx;
> struct request_queue *q = iter_data->q;
> struct blk_mq_tag_set *set = q->tag_set;
> - bool reserved = iter_data->reserved;
> struct blk_mq_tags *tags;
> struct request *rq;
> bool ret = true;
> @@ -276,7 +275,7 @@ static bool bt_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
> else
> tags = hctx->tags;
>
> - if (!reserved)
> + if (!iter_data->reserved)
> bitnr += tags->nr_reserved_tags;
> /*
> * We can hit rq == NULL here, because the tagging functions
Is the above change really necessary?
> @@ -337,12 +336,11 @@ static bool bt_tags_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
> {
> struct bt_tags_iter_data *iter_data = data;
> struct blk_mq_tags *tags = iter_data->tags;
> - bool reserved = iter_data->flags & BT_TAG_ITER_RESERVED;
> struct request *rq;
> bool ret = true;
> bool iter_static_rqs = !!(iter_data->flags & BT_TAG_ITER_STATIC_RQS);
>
> - if (!reserved)
> + if (!(iter_data->flags & BT_TAG_ITER_RESERVED))
> bitnr += tags->nr_reserved_tags;
>
> /*
Same question here: is the above change really necessary?
Thanks,
Bart.
next prev parent reply other threads:[~2022-06-17 16:33 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-17 10:55 [PATCH 0/5] blk-mq: Add a flag for reserved requests series John Garry
2022-06-17 10:55 ` [PATCH 1/5] scsi: core: Remove reserved request time-out handling John Garry
2022-06-17 16:25 ` Bart Van Assche
2022-06-20 5:58 ` Christoph Hellwig
2022-06-20 7:37 ` John Garry
2022-06-20 9:14 ` Hannes Reinecke
2022-06-17 10:55 ` [PATCH 2/5] blk-mq: Add a flag for reserved requests John Garry
2022-06-20 9:15 ` Hannes Reinecke
2022-06-17 10:55 ` [PATCH 3/5] blk-mq: Drop blk_mq_ops.timeout 'reserved' arg John Garry
2022-06-17 16:29 ` Bart Van Assche
2022-06-20 5:59 ` Christoph Hellwig
2022-06-20 9:15 ` Hannes Reinecke
2022-06-17 10:55 ` [PATCH 4/5] scsi: fnic: Drop reserved request handling John Garry
2022-06-17 16:29 ` Bart Van Assche
2022-06-20 5:59 ` Christoph Hellwig
2022-06-20 9:15 ` Hannes Reinecke
2022-06-17 10:55 ` [PATCH 5/5] blk-mq: Drop 'reserved' member of busy_tag_iter_fn John Garry
2022-06-17 16:33 ` Bart Van Assche [this message]
2022-06-17 16:42 ` John Garry
2022-06-17 16:55 ` Bart Van Assche
2022-06-20 11:12 ` John Garry
2022-06-20 6:00 ` Christoph Hellwig
2022-06-20 9:16 ` Hannes Reinecke
2022-06-22 0:51 ` [PATCH 0/5] blk-mq: Add a flag for reserved requests series Martin K. Petersen
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