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| author | Shaohua Li <shli@fb.com> | 2017-08-14 15:04:54 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-08-23 08:54:03 -0600 |
| commit | cedcafad8277b3a07e90bf2f68fff5c6b28a183e (patch) | |
| tree | 6bbd8a28bd9513188b29f1dec567841726053bc6 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 3bf2bd20734e3e6ffda53719a9c10fb3ee9c5ffa (diff) | |
nullb: add interface to power on disk
The device created in nullb configfs interface isn't power on by
default. After user configures the device, user can do 'echo 1 >
xxx/nullb/device_name/power' to power on the device, which will create a
disk. the xxx/nullb/device_name/index is the disk index, so if the index
is 2, the new created disk should be named as /dev/nullb2. Note, the
'index' is only valid after disk is power on.
'echo 0 > xxx/nullb/device_name/power' will remove the disk. Note, this
doesn't remove the device. To remove the device, user should do 'rmdir
xxx/nullb/device_name'. Removing the device will remove the disk too.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions