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5 Commits
Author SHA1 Message Date
Bob Liu ff610a1d55 mm: cleancache: clean up cleancache_enabled 
cleancache_ops is used to decide whether backend is registered.
So now cleancache_enabled is always true if defined CONFIG_CLEANCACHE.

Signed-off-by: Bob Liu <[email protected]>
Cc: Wanpeng Li <[email protected]>
Cc: Andor Daam <[email protected]>
Cc: Dan Magenheimer <[email protected]>
Cc: Florian Schmaus <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Stefan Hengelein <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
 2013-04-30 17:04:01 -07:00
Konrad Rzeszutek Wilk 833f8662af cleancache: Make cleancache_init use a pointer for the ops 
Instead of using a backend_registered to determine whether a backend is
enabled.  This allows us to remove the backend_register check and just
do 'if (cleancache_ops)'

[v1: Rebase on top of b97c4b430b0a (ramster->zcache move]
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
Signed-off-by: Bob Liu <[email protected]>
Cc: Wanpeng Li <[email protected]>
Cc: Andor Daam <[email protected]>
Cc: Dan Magenheimer <[email protected]>
Cc: Florian Schmaus <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Stefan Hengelein <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
 2013-04-30 17:04:01 -07:00
Dan Magenheimer 91c6cc9b5c mm: zcache/tmem/cleancache: s/flush/invalidate/ 
Complete the renaming from "flush" to "invalidate" across
both tmem frontends (cleancache and frontswap) and both tmem backends
(Xen and zcache), as required by akpm.

This change is completely cosmetic.

[v10: no change]
[v9: [email protected]: change "flush" to "invalidate", part 3]
Signed-off-by: Dan Magenheimer <[email protected]>
Cc: Kamezawa Hiroyuki <[email protected]>
Cc: Jan Beulich <[email protected]>
Acked-by: Seth Jennings <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Nitin Gupta <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Chris Mason <[email protected]>
Cc: Rik Riel <[email protected]>
Cc: Andrew Morton <[email protected]>
[v11: Remove the frontswap part]
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
 2012-01-23 16:06:37 -05:00
Dan Magenheimer 3167760f83 mm: cleancache: s/flush/invalidate/ 
Per akpm suggestions alter the use of the term flush to be
invalidate. The next patch will do this across all MM.

This change is completely cosmetic.

[v9: [email protected]: change "flush" to "invalidate", part 3]

Signed-off-by: Dan Magenheimer <[email protected]>
Cc: Kamezawa Hiroyuki <[email protected]>
Cc: Jan Beulich <[email protected]>
Reviewed-by: Seth Jennings <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Nitin Gupta <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Chris Mason <[email protected]>
Cc: Rik Riel <[email protected]>
Cc: Andrew Morton <[email protected]>
[v10: Fixed  fs: move code out of buffer.c conflict change]
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
 2012-01-23 16:06:24 -05:00
Dan Magenheimer 077b1f83a6 mm: cleancache core ops functions and config 
This third patch of eight in this cleancache series provides
the core code for cleancache that interfaces between the hooks in
VFS and individual filesystems and a cleancache backend.  It also
includes build and config patches.

Two new files are added: mm/cleancache.c and include/linux/cleancache.h.

Note that CONFIG_CLEANCACHE can default to on; in systems that do
not provide a cleancache backend, all hooks devolve to a simple
check of a global enable flag, so performance impact should
be negligible but can be reduced to zero impact if config'ed off.
However for this first commit, it defaults to off.

Details and a FAQ can be found in Documentation/vm/cleancache.txt

Credits: Cleancache_ops design derived from Jeremy Fitzhardinge
design for tmem

[v8: [email protected]: fix exportfs call affecting btrfs]
[v8: [email protected]: use static inline function, not macro]
[v7: [email protected]: cleanup sysfs and remove cleancache prefix]
[v6: [email protected]: robustly handle buggy fs encode_fh actor definition]
[v5: [email protected]: clean up global usage and static var names]
[v5: [email protected]: simplify init hook and any future fs init changes]
[v5: [email protected]: cleaner non-global interface for ops registration]
[v4: [email protected]: interface must support exportfs FS's]
[v4: [email protected]: interface must support 64-bit FS on 32-bit kernel]
[v3: [email protected]: use one ops struct to avoid pointer hops]
[v3: [email protected]: document and ensure PageLocked reqts are met]
[v3: [email protected]: fix success/fail codes, change funcs to void]
[v2: [email protected]: use sane types]
Signed-off-by: Dan Magenheimer <[email protected]>
Reviewed-by: Jeremy Fitzhardinge <[email protected]>
Reviewed-by: Konrad Rzeszutek Wilk <[email protected]>
Acked-by: Al Viro <[email protected]>
Acked-by: Andrew Morton <[email protected]>
Acked-by: Nitin Gupta <[email protected]>
Acked-by: Minchan Kim <[email protected]>
Acked-by: Andreas Dilger <[email protected]>
Acked-by: Jan Beulich <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Nick Piggin <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Rik Van Riel <[email protected]>
Cc: Chris Mason <[email protected]>
Cc: Ted Ts'o <[email protected]>
Cc: Mark Fasheh <[email protected]>
Cc: Joel Becker <[email protected]>
 2011-05-26 10:01:36 -06:00