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| author | Jens Axboe <jaxboe@fusionio.com> | 2010-06-09 12:42:09 +0400 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-08-07 20:13:00 +0400 |
| commit | e2e1a148bc45855816ae6b4692ce29d0020fa22e (patch) | |
| tree | fd5ec8a580d4333b471acfe50f6f92b4cc880087 /lib | |
| parent | 841fdffdd382722d33579a6aa1487e8a4e526dbd (diff) | |
| download | linux-e2e1a148bc45855816ae6b4692ce29d0020fa22e.tar.xz | |
block: add sysfs knob for turning off disk entropy contributions
There are two reasons for doing this:
- On SSD disks, the completion times aren't as random as they
are for rotational drives. So it's questionable whether they
should contribute to the random pool in the first place.
- Calling add_disk_randomness() has a lot of overhead.
This adds /sys/block/<dev>/queue/add_random that will allow you to
switch off on a per-device basis. The default setting is on, so there
should be no functional changes from this patch.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions