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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-06-24 00:01:30 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-06-24 00:01:30 +0200 |
| commit | 8ea3a7c0df05b2cb33e2d63aa1c964308724b1c4 (patch) | |
| tree | 8fbd1ba22b5ef12c7434316b975a077aabb4cfa6 /Documentation | |
| parent | xfs: Correctly lock inode when removing suid and file capabilities (diff) | |
| parent | FS-Cache: Retain the netfs context in the retrieval op earlier (diff) | |
| download | linux-8ea3a7c0df05b2cb33e2d63aa1c964308724b1c4.tar.xz linux-8ea3a7c0df05b2cb33e2d63aa1c964308724b1c4.zip | |
Merge branch 'fscache-fixes' into for-next
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/caching/backend-api.txt | 23 | ||||
| -rw-r--r-- | Documentation/filesystems/caching/fscache.txt | 7 |
2 files changed, 29 insertions, 1 deletions
diff --git a/Documentation/filesystems/caching/backend-api.txt b/Documentation/filesystems/caching/backend-api.txt index 277d1e810670..c0bd5677271b 100644 --- a/Documentation/filesystems/caching/backend-api.txt +++ b/Documentation/filesystems/caching/backend-api.txt @@ -676,6 +676,29 @@ FS-Cache provides some utilities that a cache backend may make use of: as possible. + (*) Indicate that a stale object was found and discarded: + + void fscache_object_retrying_stale(struct fscache_object *object); + + This is called to indicate that the lookup procedure found an object in + the cache that the netfs decided was stale. The object has been + discarded from the cache and the lookup will be performed again. + + + (*) Indicate that the caching backend killed an object: + + void fscache_object_mark_killed(struct fscache_object *object, + enum fscache_why_object_killed why); + + This is called to indicate that the cache backend preemptively killed an + object. The why parameter should be set to indicate the reason: + + FSCACHE_OBJECT_IS_STALE - the object was stale and needs discarding. + FSCACHE_OBJECT_NO_SPACE - there was insufficient cache space + FSCACHE_OBJECT_WAS_RETIRED - the object was retired when relinquished. + FSCACHE_OBJECT_WAS_CULLED - the object was culled to make space. + + (*) Get and release references on a retrieval record: void fscache_get_retrieval(struct fscache_retrieval *op); diff --git a/Documentation/filesystems/caching/fscache.txt b/Documentation/filesystems/caching/fscache.txt index 770267af5b3e..50f0a5757f48 100644 --- a/Documentation/filesystems/caching/fscache.txt +++ b/Documentation/filesystems/caching/fscache.txt @@ -284,8 +284,9 @@ proc files. enq=N Number of times async ops queued for processing can=N Number of async ops cancelled rej=N Number of async ops rejected due to object lookup/create failure + ini=N Number of async ops initialised dfr=N Number of async ops queued for deferred release - rel=N Number of async ops released + rel=N Number of async ops released (should equal ini=N when idle) gc=N Number of deferred-release async ops garbage collected CacheOp alo=N Number of in-progress alloc_object() cache ops luo=N Number of in-progress lookup_object() cache ops @@ -303,6 +304,10 @@ proc files. wrp=N Number of in-progress write_page() cache ops ucp=N Number of in-progress uncache_page() cache ops dsp=N Number of in-progress dissociate_pages() cache ops + CacheEv nsp=N Number of object lookups/creations rejected due to lack of space + stl=N Number of stale objects deleted + rtr=N Number of objects retired when relinquished + cul=N Number of objects culled (*) /proc/fs/fscache/histogram |