Here are some patches that perform some preparatory work for the fscache
rewrite that's being worked on. These include:
(1) Always select netfs stats when enabling fscache stats since they're
displayed through the same procfile.
(2) Add a cookie debug ID that can be used in tracepoints instead of a
pointer and cache it in the netfs_cache_resources struct rather than
in the netfs_read_request struct to make it more available.
(3) Use file_inode() in cachefiles rather than dereferencing file->f_inode
directly.
(4) Provide a procfile to display fscache cookies.
(5) Remove the fscache and cachefiles histogram procfiles.
(6) Remove the fscache object list procfile.
(7) Avoid using %p in fscache and cachefiles as the value is hashed and
not comparable to the register dump in an oops trace.
(8) Fix the cookie hash function to actually achieve useful dispersion.
(9) Fix fscache_cookie_put() so that it doesn't dereference the cookie
pointer in the tracepoint after the refcount has been decremented
(we're only allowed to do that if we decremented it to zero).
(10) Use refcount_t rather than atomic_t for the fscache_cookie refcount.
The patches can be found on this branch:
http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=fscache-next
David
---
David Howells (12):
fscache: Select netfs stats if fscache stats are enabled
netfs: Move cookie debug ID to struct netfs_cache_resources
cachefiles: Use file_inode() rather than accessing ->f_inode
fscache: Add a cookie debug ID and use that in traces
fscache: Procfile to display cookies
fscache, cachefiles: Remove the histogram stuff
fscache: Remove the object list procfile
fscache: Change %p in format strings to something else
cachefiles: Change %p in format strings to something else
fscache: Fix cookie key hashing
fscache: Fix fscache_cookie_put() to not deref after dec
fscache: Use refcount_t for the cookie refcount instead of atomic_t
fs/cachefiles/Kconfig | 19 --
fs/cachefiles/Makefile | 2 -
fs/cachefiles/bind.c | 2 -
fs/cachefiles/interface.c | 6 +-
fs/cachefiles/internal.h | 25 --
fs/cachefiles/io.c | 6 +-
fs/cachefiles/key.c | 2 +-
fs/cachefiles/main.c | 7 -
fs/cachefiles/namei.c | 61 ++---
fs/cachefiles/proc.c | 114 --------
fs/cachefiles/xattr.c | 4 +-
fs/fscache/Kconfig | 24 --
fs/fscache/Makefile | 2 -
fs/fscache/cache.c | 11 +-
fs/fscache/cookie.c | 201 +++++++++++----
fs/fscache/fsdef.c | 3 +-
fs/fscache/histogram.c | 87 -------
fs/fscache/internal.h | 57 +---
fs/fscache/main.c | 39 +++
fs/fscache/netfs.c | 2 +-
fs/fscache/object-list.c | 414 ------------------------------
fs/fscache/object.c | 8 -
fs/fscache/operation.c | 3 -
fs/fscache/page.c | 6 -
fs/fscache/proc.c | 20 +-
include/linux/fscache-cache.h | 4 -
include/linux/fscache.h | 4 +-
include/linux/netfs.h | 2 +-
include/trace/events/cachefiles.h | 68 ++---
include/trace/events/fscache.h | 160 ++++++------
include/trace/events/netfs.h | 2 +-
31 files changed, 367 insertions(+), 998 deletions(-)
delete mode 100644 fs/cachefiles/proc.c
delete mode 100644 fs/fscache/histogram.c
delete mode 100644 fs/fscache/object-list.c
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