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authorJens Axboe <axboe@kernel.dk>2013-05-15 10:36:25 +0200
committerJens Axboe <axboe@kernel.dk>2013-05-15 10:36:25 +0200
commitc0a363f5cf21f79d72ab630524c3aa06fc6d066c (patch)
tree6127eba7172ab1117dc18fcdc6b08352c736cafd /Documentation
parent093c959307f2f5af72b24fdc4af7d4d0263f6eea (diff)
parentf59fce847fc8483508b5028c24e2b1e00523dd88 (diff)
downloadlinux-linaro-stable-c0a363f5cf21f79d72ab630524c3aa06fc6d066c.tar.gz
Merge branch 'bcache-for-upstream' of git://evilpiepirate.org/~kent/linux-bcache into for-linus
Kent writes: Jens - couple more bcache patches. Bug fixes and a doc update.
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/bcache.txt12
1 files changed, 9 insertions, 3 deletions
diff --git a/Documentation/bcache.txt b/Documentation/bcache.txt
index 77db8809bd96..b3a7e7d384f6 100644
--- a/Documentation/bcache.txt
+++ b/Documentation/bcache.txt
@@ -319,7 +319,10 @@ cache<0..n>
Symlink to each of the cache devices comprising this cache set.
cache_available_percent
- Percentage of cache device free.
+ Percentage of cache device which doesn't contain dirty data, and could
+ potentially be used for writeback. This doesn't mean this space isn't used
+ for clean cached data; the unused statistic (in priority_stats) is typically
+ much lower.
clear_stats
Clears the statistics associated with this cache
@@ -423,8 +426,11 @@ nbuckets
Total buckets in this cache
priority_stats
- Statistics about how recently data in the cache has been accessed. This can
- reveal your working set size.
+ Statistics about how recently data in the cache has been accessed.
+ This can reveal your working set size. Unused is the percentage of
+ the cache that doesn't contain any data. Metadata is bcache's
+ metadata overhead. Average is the average priority of cache buckets.
+ Next is a list of quantiles with the priority threshold of each.
written
Sum of all data that has been written to the cache; comparison with