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| author |   Minwoo Im <minwoo.im.dev@gmail.com> | 2021-04-21 16:45:04 +0900 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2021-04-22 07:25:17 +0200 |
| commit | 2637baed78010eeaae274feb5b99ce90933fadfb (patch) | |
| tree | f62d5575463b77bd8ca7da8d6d2ed8086d54a8a3 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | nvme: cleanup nvme_configure_apst (diff) | |
| download | wireguard-linux-2637baed78010eeaae274feb5b99ce90933fadfb.tar.xz wireguard-linux-2637baed78010eeaae274feb5b99ce90933fadfb.zip | |
nvme: introduce generic per-namespace chardev
Userspace has not been allowed to I/O to device that's failed to
be initialized. This patch introduces generic per-namespace character
device to allow userspace to I/O regardless the block device is there or
not.
The chardev naming convention will similar to the existing blkdev naming,
using a ng prefix instead of nvme, i.e.
- /dev/ngXnY
It also supports multipath which means it will not expose chardev for the
hidden namespace blkdevs (e.g., nvmeXcYnZ). If /dev/ngXnY is created for
a ns_head, then I/O request will be routed to a specific controller
selected by the iopolicy of the subsystem.
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Tested-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions