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| author | Dennis Zhou <dennis@kernel.org> | 2019-02-25 13:41:45 -0800 |
|---|---|---|
| committer | Dennis Zhou <dennis@kernel.org> | 2019-03-13 12:25:31 -0700 |
| commit | 382b88e961c7a4196e01cef3249297583d02d608 (patch) | |
| tree | 0d1dc78b084265547ec2531b42c6cb3a59a8340e /block/blk-stat.h | |
| parent | b239f7daf5530f562000bf55f02cc8028703f507 (diff) | |
| download | linux-rt-382b88e961c7a4196e01cef3249297583d02d608.tar.gz | |
percpu: add block level scan_hint
Fragmentation can cause both blocks and chunks to have an early
first_firee bit available, but only able to satisfy allocations much
later on. This patch introduces a scan_hint to help mitigate some
unnecessary scanning.
The scan_hint remembers the largest area prior to the contig_hint. If
the contig_hint == scan_hint, then scan_hint_start > contig_hint_start.
This is necessary for scan_hint discovery when refreshing a block.
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Diffstat (limited to 'block/blk-stat.h')
0 files changed, 0 insertions, 0 deletions