nvme: let dm-mpath distinguish nvme error codes

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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>

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Junxiong Guan 2017-04-21 12:59:07 +02:00 • committed by Christoph Hellwig

parent 7776db1ccc

commit e02ab02304

1 changed files with 14 additions and 0 deletions

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drivers/nvme/host/core.c

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