From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-bcache@vger.kernel.org, linux-xtensa@linux-xtensa.org,
linux-nvdimm@lists.01.org, linux-s390@vger.kernel.org,
dm-devel@redhat.com, linux-nvme@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org,
linux-m68k@lists.linux-m68k.org, linuxppc-dev@lists.ozlabs.org,
drbd-dev@lists.linbit.com
Subject: [PATCH 19/20] block: shortcut __submit_bio_noacct for blk-mq drivers
Date: Mon, 29 Jun 2020 21:39:46 +0200 [thread overview]
Message-ID: <20200629193947.2705954-20-hch@lst.de> (raw)
In-Reply-To: <20200629193947.2705954-1-hch@lst.de>
For blk-mq drivers bios can only be inserted for the same queue. So
bypass the complicated sorting logic in __submit_bio_noacct with
a blk-mq simpler submission helper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-core.c | 50 +++++++++++++++++++++++++++++++++---------------
1 file changed, 35 insertions(+), 15 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index b82f48c86e6f7a..46e3c0a37cc377 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1071,20 +1071,6 @@ static noinline_for_stack bool submit_bio_checks(struct bio *bio)
return false;
}
-static blk_qc_t do_make_request(struct bio *bio)
-{
- struct gendisk *disk = bio->bi_disk;
- blk_qc_t ret = BLK_QC_T_NONE;
-
- if (blk_crypto_bio_prep(&bio)) {
- if (!disk->fops->submit_bio)
- return blk_mq_submit_bio(bio);
- ret = disk->fops->submit_bio(bio);
- }
- blk_queue_exit(disk->queue);
- return ret;
-}
-
/*
* The loop in this function may be a bit non-obvious, and so deserves some
* explanation:
@@ -1127,7 +1113,11 @@ static blk_qc_t __submit_bio_noacct(struct bio *bio)
bio_list_on_stack[1] = bio_list_on_stack[0];
bio_list_init(&bio_list_on_stack[0]);
- ret = do_make_request(bio);
+ if (blk_crypto_bio_prep(&bio))
+ ret = bio->bi_disk->fops->submit_bio(bio);
+ else
+ ret = BLK_QC_T_NONE;
+ blk_queue_exit(q);
/*
* Sort new bios into those for a lower level and those for the
@@ -1153,6 +1143,34 @@ static blk_qc_t __submit_bio_noacct(struct bio *bio)
return ret;
}
+static blk_qc_t __submit_bio_noacct_mq(struct bio *bio)
+{
+ struct gendisk *disk = bio->bi_disk;
+ struct bio_list bio_list;
+ blk_qc_t ret = BLK_QC_T_NONE;
+
+ bio_list_init(&bio_list);
+ current->bio_list = &bio_list;
+
+ do {
+ WARN_ON_ONCE(bio->bi_disk != disk);
+
+ if (unlikely(bio_queue_enter(bio) != 0))
+ continue;
+
+ if (!blk_crypto_bio_prep(&bio)) {
+ blk_queue_exit(disk->queue);
+ ret = BLK_QC_T_NONE;
+ continue;
+ }
+
+ ret = blk_mq_submit_bio(bio);
+ } while ((bio = bio_list_pop(&bio_list)));
+
+ current->bio_list = NULL;
+ return ret;
+}
+
/**
* submit_bio_noacct - re-submit a bio to the block device layer for I/O
* @bio: The bio describing the location in memory and on the device.
@@ -1182,6 +1200,8 @@ blk_qc_t submit_bio_noacct(struct bio *bio)
return BLK_QC_T_NONE;
}
+ if (bio->bi_disk->queue->mq_ops)
+ return __submit_bio_noacct_mq(bio);
return __submit_bio_noacct(bio);
}
EXPORT_SYMBOL(submit_bio_noacct);
--
2.26.2
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next prev parent reply other threads:[~2020-06-29 19:42 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 19:39 rename ->make_request_fn and move it to the block_device_operations Christoph Hellwig
2020-06-29 19:39 ` [PATCH 01/20] nfblock: stop using ->queuedata Christoph Hellwig
2020-06-29 21:47 ` Geert Uytterhoeven
2020-06-29 19:39 ` [PATCH 02/20] simdisk: " Christoph Hellwig
2020-06-29 19:39 ` [PATCH 03/20] drbd: " Christoph Hellwig
2020-06-29 19:39 ` [PATCH 04/20] null_blk: stop using ->queuedata for bio mode Christoph Hellwig
2020-06-29 19:39 ` [PATCH 05/20] ps3vram: stop using ->queuedata Christoph Hellwig
2020-06-29 19:39 ` [PATCH 06/20] rsxx: " Christoph Hellwig
2020-06-29 19:39 ` [PATCH 07/20] umem: " Christoph Hellwig
2020-06-29 19:39 ` [PATCH 08/20] zram: " Christoph Hellwig
2020-06-29 19:39 ` [PATCH 09/20] bcache: stop setting ->queuedata Christoph Hellwig
2020-06-29 19:39 ` [PATCH 10/20] dm: stop using ->queuedata Christoph Hellwig
2020-06-29 19:39 ` [PATCH 11/20] fs: remove a weird comment in submit_bh_wbc Christoph Hellwig
2020-06-30 13:54 ` Jens Axboe
2020-06-29 19:39 ` [PATCH 12/20] block: remove the request_queue argument from blk_queue_split Christoph Hellwig
2020-06-29 19:39 ` [PATCH 13/20] block: tidy up a warning in bio_check_ro Christoph Hellwig
2020-06-29 19:39 ` [PATCH 14/20] block: remove the NULL queue check in generic_make_request_checks Christoph Hellwig
2020-06-29 19:39 ` [PATCH 15/20] block: remove the nr_sectors variable " Christoph Hellwig
2020-06-29 19:39 ` [PATCH 16/20] block: move ->make_request_fn to struct block_device_operations Christoph Hellwig
2020-06-29 19:39 ` [PATCH 17/20] block: rename generic_make_request to submit_bio_noacct Christoph Hellwig
2020-06-29 19:39 ` [PATCH 18/20] block: refator submit_bio_noacct Christoph Hellwig
2020-07-02 14:10 ` Qian Cai
2020-07-02 15:14 ` Christoph Hellwig
2020-07-02 15:52 ` Naresh Kamboju
2020-07-02 15:15 ` Naresh Kamboju
2020-06-29 19:39 ` Christoph Hellwig [this message]
2020-06-29 19:39 ` [PATCH 20/20] block: remove direct_make_request Christoph Hellwig
2020-06-30 13:57 ` rename ->make_request_fn and move it to the block_device_operations Jens Axboe
2020-06-30 15:43 ` Jens Axboe
2020-06-30 18:19 ` Christoph Hellwig
2020-06-30 18:21 ` Jens Axboe
2020-06-30 18:55 ` Jens Axboe
2020-07-01 8:59 rename ->make_request_fn and move it to the block_device_operations v2 Christoph Hellwig
2020-07-01 8:59 ` [PATCH 19/20] block: shortcut __submit_bio_noacct for blk-mq drivers Christoph Hellwig
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