diff options
Diffstat (limited to 'Documentation/device-mapper')
| -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 | |||
| 58 | contiguous I/Os to try to spot when the io is in one of these sequential | 58 | contiguous I/Os to try to spot when the io is in one of these sequential |
| 59 | modes. | 59 | modes. |
| 60 | 60 | ||
| 61 | Internally the mq policy maintains a promotion threshold variable. If | 61 | Internally the mq policy determines a promotion threshold. If the hit |
| 62 | the hit count of a block not in the cache goes above this threshold it | 62 | count of a block not in the cache goes above this threshold it gets |
| 63 | gets promoted to the cache. The read, write and discard promote adjustment | 63 | promoted to the cache. The read, write and discard promote adjustment |
| 64 | tunables allow you to tweak the promotion threshold by adding a small | 64 | tunables allow you to tweak the promotion threshold by adding a small |
| 65 | value based on the io type. They default to 4, 8 and 1 respectively. | 65 | value based on the io type. They default to 4, 8 and 1 respectively. |
| 66 | If you're trying to quickly warm a new cache device you may wish to | 66 | If you're trying to quickly warm a new cache device you may wish to |