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| author | Jens Axboe <axboe@kernel.dk> | 2013-05-15 10:36:25 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-05-15 10:36:25 +0200 |
| commit | c0a363f5cf21f79d72ab630524c3aa06fc6d066c (patch) | |
| tree | 6127eba7172ab1117dc18fcdc6b08352c736cafd /Documentation | |
| parent | mtip32xx: Correctly handle bio->bi_idx != 0 conditions (diff) | |
| parent | bcache: Fix error handling in init code (diff) | |
| download | linux-c0a363f5cf21f79d72ab630524c3aa06fc6d066c.tar.xz linux-c0a363f5cf21f79d72ab630524c3aa06fc6d066c.zip | |
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.txt | 12 |
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 |