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| author | Christoph Hellwig <hch@lst.de> | 2020-09-24 08:51:34 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-09-24 13:43:39 -0600 |
| commit | c2e4cd57cfa1f627b786c764d185fff85fd12be9 (patch) | |
| tree | 7b562f0ea09b6bf6dc45c14a7938ead0daab2aee /block/blk-sysfs.c | |
| parent | 16ef510139315a2147ee7525796f8dbd4e4b7864 (diff) | |
| download | linux-c2e4cd57cfa1f627b786c764d185fff85fd12be9.tar.gz linux-c2e4cd57cfa1f627b786c764d185fff85fd12be9.tar.bz2 linux-c2e4cd57cfa1f627b786c764d185fff85fd12be9.zip | |
block: lift setting the readahead size into the block layer
Drivers shouldn't really mess with the readahead size, as that is a VM
concept. Instead set it based on the optimal I/O size by lifting the
algorithm from the md driver when registering the disk. Also set
bdi->io_pages there as well by applying the same scheme based on
max_sectors. To ensure the limits work well for stacking drivers a
new helper is added to update the readahead limits from the block
limits, which is also called from disk_stack_limits.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-sysfs.c')
| -rw-r--r-- | block/blk-sysfs.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 81722cdcf0cb..869ed21a9edc 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -854,6 +854,8 @@ int blk_register_queue(struct gendisk *disk) percpu_ref_switch_to_percpu(&q->q_usage_counter); } + blk_queue_update_readahead(q); + ret = blk_trace_init_sysfs(dev); if (ret) return ret; |