Commit 54bb0ade authored Aug 31, 2017 by Shaohua Li Committed by Jens Axboe Sep 01, 2017

block/loop: set hw_sectors



Loop can handle any size of request. Limiting it to 255 sectors just
burns the CPU for bio split and request merge for underlayer disk and
also cause bad fs block allocation in directio mode.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 2670cd16

drivers/block/loop.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1736,6 +1736,7 @@ static int loop_add(struct loop_device **l, int i)

		blk_queue_physical_block_size(lo->lo_queue, PAGE_SIZE);

		blk_queue_max_hw_sectors(lo->lo_queue, BLK_DEF_MAX_SECTORS);
		/*
		* It doesn't make sense to enable merge because the I/O
		* submitted to backing file is handled page by page.

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