[PATCH 3/3] nvme: redirect commands on dying queue

[Christoph Hellwig]

On Mon, Aug 17, 2020 at 01:49:47PM +0800, Chao Leng wrote:
> If without any multipath, will not retry.

Which is the right thing to do.

> This may not be what we expected.
> If we can support both NVMe multipathing and third-party multipathing,
> it would be great. In addition to DM-MULTIPATH, third-party multipathing
> software is provided by storage vendors, such as PowerPath(DELL&EMC),
> SecurePath(hp), Ultrapath(huawei), etc.

For dm-multipath we only guarantee we don't break old behavior.  ANA
was never supported without nvme-multipath so this isn't part of it.

Out of tree junk is completely unsupported per the kernel wide policy,
unrelated to the nvme driver itself.