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    SubjectRe: [patch 6/7] blk: add plug for blkdev_issue_discard
    On Mon, Mar 12, 2012 at 11:04:18AM +0800, Shaohua Li wrote:
    > In raid 0 case, a big discard request is divided into several small requests
    > in chunk_size unit. Such requests can be merged in low layer if we have
    > correct plug added. This should improve the performance a little bit.

    Martin posted a patch to remove the support for allowing merging of discard
    requests. But this seems to be a reasonable use case for allowing mering
    discard requests. CCing Martin.


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