diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-10-30 16:50:15 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2022-11-15 10:50:31 +0100 |
| commit | 1b96f862ecccb3e6f950eba584bebf22955cecc5 (patch) | |
| tree | 85ca6d248f86146a2d487a0c90fbc1280e179124 /drivers/nvme/host/nvme.h | |
| parent | e4fbcf32c860f98103ca7f1dc8c0dc69e2219ec6 (diff) | |
nvme: implement the DEAC bit for the Write Zeroes command
While the specification allows devices to either deallocate data
or to actually write zeroes on any Write Zeroes command, many SSDs
only do the sensible thing and deallocate data when the DEAC bit
is specific. Set it when it is supported and the caller doesn't
explicitly opt out of deallocation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/nvme/host/nvme.h')
| -rw-r--r-- | drivers/nvme/host/nvme.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index f9df10653f3c..16b34a491495 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -455,6 +455,7 @@ static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head) enum nvme_ns_features { NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */ NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */ + NVME_NS_DEAC, /* DEAC bit in Write Zeores supported */ }; struct nvme_ns { |