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| author | Omar Sandoval <osandov@fb.com> | 2016-09-17 01:28:25 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-09-17 08:39:14 -0600 |
| commit | 98d95416dbfaf4910caadfb4ddc75e4aacbdff8c (patch) | |
| tree | ed6a08e6d4358da522265ac1e6a595fe8db35572 /lib/random32.c | |
| parent | f4a644db86669d938c71f19560aebf69d4720d63 (diff) | |
| download | op-kernel-dev-98d95416dbfaf4910caadfb4ddc75e4aacbdff8c.zip op-kernel-dev-98d95416dbfaf4910caadfb4ddc75e4aacbdff8c.tar.gz | |
sbitmap: randomize initial alloc_hint values
In order to get good cache behavior from a sbitmap, we want each CPU to
stick to its own cacheline(s) as much as possible. This might happen
naturally as the bitmap gets filled up and the alloc_hint values spread
out, but we really want this behavior from the start. blk-mq apparently
intended to do this, but the code to do this was never wired up. Get rid
of the dead code and make it part of the sbitmap library.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'lib/random32.c')
0 files changed, 0 insertions, 0 deletions
