diff options
| author | Guixin Liu <kanie@linux.alibaba.com> | 2022-07-29 11:53:05 +0800 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2022-09-19 11:33:54 +0200 |
| commit | d416800776b530ad629b2959909062287339defd (patch) | |
| tree | f2705ad1242a901787b76f00b4b1f53d06391caa | |
| parent | c46724cb8947697d4cfa5db44763d7c63b93a02b (diff) | |
nvmet: avoid unnecessary flush bio
For no volatile write cache block device backend, sending flush bio is
unnecessary, avoid to do that.
Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/nvme/target/io-cmd-bdev.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index 2dc1c1035626..8d527a8c0f54 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -334,6 +334,11 @@ static void nvmet_bdev_execute_flush(struct nvmet_req *req) { struct bio *bio = &req->b.inline_bio; + if (!bdev_write_cache(req->ns->bdev)) { + nvmet_req_complete(req, NVME_SC_SUCCESS); + return; + } + if (!nvmet_check_transfer_len(req, 0)) return; @@ -347,6 +352,9 @@ static void nvmet_bdev_execute_flush(struct nvmet_req *req) u16 nvmet_bdev_flush(struct nvmet_req *req) { + if (!bdev_write_cache(req->ns->bdev)) + return 0; + if (blkdev_issue_flush(req->ns->bdev)) return NVME_SC_INTERNAL | NVME_SC_DNR; return 0; |