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| author | Joe Thornber <ejt@redhat.com> | 2013-10-24 20:10:28 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2013-11-10 00:20:25 +0100 |
| commit | 01911c19bea63b1a958b9d9024504c2e9079f155 (patch) | |
| tree | 613f9334c9d85702ff89168f587d4d90d24378b9 /Documentation/isdn | |
| parent | dm cache: optimize commit_if_needed (diff) | |
| download | linux-01911c19bea63b1a958b9d9024504c2e9079f155.tar.xz linux-01911c19bea63b1a958b9d9024504c2e9079f155.zip | |
dm cache policy mq: implement writeback_work() and mq_{set,clear}_dirty()
There are now two multiqueues for in cache blocks. A clean one and a
dirty one.
writeback_work comes from the dirty one. Demotions come from the clean
one.
There are two benefits:
- Performance improvement, since demoting a clean block is a noop.
- The cache cleans itself when io load is light.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'Documentation/isdn')
0 files changed, 0 insertions, 0 deletions