Mike Snitzer 42c9cdfe1e block: allow max_discard_segments to be stacked
Set max_discard_segments to USHRT_MAX in blk_set_stacking_limits() so
that blk_stack_limits() can stack up this limit for stacked devices.

before:

$ cat /sys/block/nvme0n1/queue/max_discard_segments
256
$ cat /sys/block/dm-0/queue/max_discard_segments
1

after:

$ cat /sys/block/nvme0n1/queue/max_discard_segments
256
$ cat /sys/block/dm-0/queue/max_discard_segments
256

Fixes: 1e739730c5b9e ("block: optionally merge discontiguous discard bios into a single request")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-07-24 14:46:39 -06:00
..
2018-07-24 14:43:26 -06:00
2018-06-14 17:01:45 +02:00
2018-06-17 05:37:55 +09:00
2018-07-24 14:43:26 -06:00
2018-07-12 08:04:08 -06:00
2018-05-31 10:50:54 -04:00