NVMe: Add discard support for capable devices

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This adds discard support to block queues if the nvme device is capable of
deallocating blocks as indicated by the controller's optional command support.
A discard flagged bio request will submit an NVMe deallocate Data Set
Management command for the requested blocks.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>

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Keith Busch 2012-11-09 16:33:05 -07:00 • committed by Matthew Wilcox

parent a12183c627

commit 0e5e4f0e56

2 changed files with 91 additions and 1 deletions

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60

drivers/block/nvme.c

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32

include/linux/nvme.h

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