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Diffstat (limited to 'Documentation/device-mapper/cache.txt')
| -rw-r--r-- | Documentation/device-mapper/cache.txt | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/device-mapper/cache.txt b/Documentation/device-mapper/cache.txt index 785eab87aa71..cdfd0feb294e 100644 --- a/Documentation/device-mapper/cache.txt +++ b/Documentation/device-mapper/cache.txt @@ -207,6 +207,10 @@ Optional feature arguments are: block, then the cache block is invalidated. To enable passthrough mode the cache must be clean. + metadata2 : use version 2 of the metadata. This stores the dirty bits + in a separate btree, which improves speed of shutting + down the cache. + A policy called 'default' is always registered. This is an alias for the policy we currently think is giving best all round performance. @@ -286,7 +290,7 @@ message, which takes an arbitrary number of cblock ranges. Each cblock range's end value is "one past the end", meaning 5-10 expresses a range of values from 5 to 9. Each cblock must be expressed as a decimal value, in the future a variant message that takes cblock ranges -expressed in hexidecimal may be needed to better support efficient +expressed in hexadecimal may be needed to better support efficient invalidation of larger caches. The cache must be in passthrough mode when invalidate_cblocks is used. |