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authorChristoph Hellwig2017-02-08 14:46:49 +0100
committerJens Axboe2017-02-08 13:43:08 -0700
commit1e739730c5b9ea80a2f25e9cf6e1025d47e3d8ed (patch)
tree4f48ed6c92153fb9941185182e918232eb3472f4 /drivers/nvme
parent34fe7c05400663e01e23cddd1fea68bb7a2b3d29 (diff)
block: optionally merge discontiguous discard bios into a single request
Add a new merge strategy that merges discard bios into a request until the maximum number of discard ranges (or the maximum discard size) is reached from the plug merging code. I/O scheduler merging is not wired up yet but might also be useful, although not for fast devices like NVMe which are the only user for now. Note that for now we don't support limiting the size of each discard range, but if needed that can be added later. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
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