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| author |   Damien Le Moal <damien.lemoal@wdc.com> | 2019-11-11 11:39:24 +0900 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2019-11-12 19:11:56 -0700 |
| commit | ceeb373aa6b9eb75ed3278d4b3ff2318c304e70c (patch) | |
| tree | 30e11bd54ea84778943137d53c5179d85a3736ef /drivers/md | |
| parent | block: cleanup the !zoned case in blk_revalidate_disk_zones (diff) | |
| download | linux-dev-ceeb373aa6b9eb75ed3278d4b3ff2318c304e70c.tar.xz linux-dev-ceeb373aa6b9eb75ed3278d4b3ff2318c304e70c.zip | |
block: Simplify report zones execution
All kernel users of blkdev_report_zones() as well as applications use
through ioctl(BLKZONEREPORT) expect to potentially get less zone
descriptors than requested. As such, the use of the internal report
zones command execution loop implemented by blk_report_zones() is
not necessary and can even be harmful to performance by causing the
execution of inefficient small zones report command to service the
reminder of a requested zone array.
This patch removes blk_report_zones(), simplifying the code. Also
remove a now incorrect comment in dm_blk_report_zones().
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Javier Gonzalez <javier@javigon.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index bc143c1b2333..89189c29438f 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -473,12 +473,6 @@ static int dm_blk_report_zones(struct gendisk *disk, sector_t sector, goto out; } - /* - * blkdev_report_zones() will loop and call this again to cover all the - * zones of the target, eventually moving on to the next target. - * So there is no need to loop here trying to fill the entire array - * of zones. - */ ret = tgt->type->report_zones(tgt, sector, zones, nr_zones); out: |