linux-toradex.git/block/blk-merge.c, branch v5.17

block: don't check ->rq_disk in merges

2021-11-29T13:41:29+00:00

There is a 1:1 relationship between request_queues and gendisks now, so
no need for these extra checks.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Link: https://lore.kernel.org/r/20211126121802.2090656-3-hch@lst.de
Signed-off-by: Jens Axboe

block: don't include in blk.h

2021-11-29T13:38:44+00:00

Not needed, shift it into the source files that need it instead.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20211123185312.1432157-9-hch@lst.de
Signed-off-by: Jens Axboe

block: don't include blk-mq-sched.h in blk.h

2021-11-29T13:38:44+00:00

No needed, shift it into the source files that need it instead.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20211123185312.1432157-5-hch@lst.de
Signed-off-by: Jens Axboe

blk-mq: simplify the plug handling in blk_mq_submit_bio

2021-11-29T13:38:35+00:00

blk_mq_submit_bio has two different plug cases, one that uses full
plugging and a limited plugging one.

The limited plugging case is only used for a corner case that does
not matter in real life:

 - no ->commit_rqs (so not NVMe)
 - no shared tags (so not SCSI)
 - not rotational (so no old disk or floppy driver)
 - must have multiple queues (so no eMMC)

Remove the limited merging case and all the related junk to simplify
blk_mq_submit_bio and the functions called from it.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20211123160443.1315598-2-hch@lst.de
Signed-off-by: Jens Axboe

blk-mq: only try to run plug merge if request has same queue with incoming bio

2021-11-03T15:27:57+00:00

It is obvious that io merge can't be done between two different queues, so
just try to run io merge in case of same queue.

Signed-off-by: Ming Lei 
Link: https://lore.kernel.org/r/20211102133502.3619184-2-ming.lei@redhat.com
Signed-off-by: Jens Axboe

block: convert leftovers to bdev_get_queue

2021-10-20T14:08:03+00:00

Convert bdev->bd_disk->queue to bdev_get_queue(), which is faster.
Apparently, there are a few such spots in block that got lost during
rebases.

Reviewed-by: Chaitanya Kulkarni 
Signed-off-by: Pavel Begunkov 
Signed-off-by: Jens Axboe

block: change plugging to use a singly linked list

2021-10-19T15:21:42+00:00

Use a singly linked list for the blk_plug. This saves 8 bytes in the
blk_plug struct, and makes for faster list manipulations than doubly
linked lists. As we don't use the doubly linked lists for anything,
singly linked is just fine.

This yields a bump in default (merging enabled) performance from 7.0
to 7.1M IOPS, and ~7.5M IOPS with merging disabled.

Reviewed-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

block: return whether or not to unplug through boolean

2021-10-19T11:55:04+00:00

Instead of returning the same queue request through a request pointer,
use a boolean to accomplish the same.

Reviewed-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

block: handle fast path of bio splitting inline

2021-10-18T12:17:36+00:00

The fast path is no splitting needed. Separate the handling into a
check part we can inline, and an out-of-line handling path if we do
need to split.

Reviewed-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

block: rename REQ_HIPRI to REQ_POLLED

2021-10-18T12:17:36+00:00

Unlike the RWF_HIPRI userspace ABI which is intentionally kept vague,
the bio flag is specific to the polling implementation, so rename and
document it properly.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Sagi Grimberg 
Reviewed-by: Chaitanya Kulkarni 
Tested-by: Mark Wunderlich 
Link: https://lore.kernel.org/r/20211012111226.760968-12-hch@lst.de
Signed-off-by: Jens Axboe