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(parent: 7776db1) | patch
nvme: let dm-mpath distinguish nvme error codes
authorJunxiong Guan <guanjunxiong@huawei.com>
Fri, 21 Apr 2017 10:59:07 +0000 (12:59 +0200)
committerChristoph Hellwig <hch@lst.de>
Fri, 21 Apr 2017 14:41:56 +0000 (16:41 +0200)
commite02ab0230489461fd9fdd8028841dae6f03a4874
treea79eccba5ffc641c0488479110f6244c89b3731ftree | snapshot
parent7776db1ccc123d5944a8c170c9c45f7e91d49643commit | diff
nvme: let dm-mpath distinguish nvme error codes

Currently most IOs which return the nvme error codes are retried on
the other path if those IOs returns EIO from NVMe driver. This
patch let Multipath distinguish nvme media error codes and some
generic or cmd-specific nvme error codes so that multipath will
not retry those kinds of IO, to save bandwidth.

Signed-off-by: Junxiong Guan <guanjunxiong@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
drivers/nvme/host/core.c diff | blob | history
Domain: System / Kernel; Licenses: GPL-2.0;