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Diffstat (limited to 'Documentation/device-mapper/cache-policies.txt')
| -rw-r--r-- | Documentation/device-mapper/cache-policies.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/device-mapper/cache-policies.txt b/Documentation/device-mapper/cache-policies.txt index 66c2774c0c64..7746e5dbfd40 100644 --- a/Documentation/device-mapper/cache-policies.txt +++ b/Documentation/device-mapper/cache-policies.txt @@ -58,9 +58,9 @@ since spindles tend to have good bandwidth. The io_tracker counts contiguous I/Os to try to spot when the io is in one of these sequential modes. -Internally the mq policy maintains a promotion threshold variable. If -the hit count of a block not in the cache goes above this threshold it -gets promoted to the cache. The read, write and discard promote adjustment +Internally the mq policy determines a promotion threshold. If the hit +count of a block not in the cache goes above this threshold it gets +promoted to the cache. The read, write and discard promote adjustment tunables allow you to tweak the promotion threshold by adding a small value based on the io type. They default to 4, 8 and 1 respectively. If you're trying to quickly warm a new cache device you may wish to |