Re: [PATCH] block: don't check position contiguity for DISCARD in attempt_merge

[Martin K. Petersen]

Jianchao,

> Discard command supports multiple ranges of blocks, so needn't
> checking position contiguity when merging. Let's do the same thing
> in attempt_merge as the blk_try_merge.

Discards need to be contiguous unless queue->limits.max_discard_segments
is bigger than 1. So if you remove this I think you need to add a
contiguity check in req_attempt_discard_merge().

-- 
Martin K. Petersen	Oracle Linux Engineering