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authorChristoph Hellwig <hch@lst.de>2020-09-24 09:51:34 +0300
committerJens Axboe <axboe@kernel.dk>2020-09-24 22:43:39 +0300
commitc2e4cd57cfa1f627b786c764d185fff85fd12be9 (patch)
tree7b562f0ea09b6bf6dc45c14a7938ead0daab2aee /drivers/md/bcache/super.c
parent16ef510139315a2147ee7525796f8dbd4e4b7864 (diff)
downloadlinux-c2e4cd57cfa1f627b786c764d185fff85fd12be9.tar.xz
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 'drivers/md/bcache/super.c')
-rw-r--r--drivers/md/bcache/super.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 48113005ed86..6bfa77167362 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1427,9 +1427,6 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size)
if (ret)
return ret;
- dc->disk.disk->queue->backing_dev_info->ra_pages =
- max(dc->disk.disk->queue->backing_dev_info->ra_pages,
- q->backing_dev_info->ra_pages);
blk_queue_io_opt(dc->disk.disk->queue,
max(queue_io_opt(dc->disk.disk->queue), queue_io_opt(q)));