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| author | David Rientjes <rientjes@google.com> | 2009-09-21 17:04:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:17:47 -0700 |
| commit | 4af5a2f770cc8575840ccb1514ec76ecb592985c (patch) | |
| tree | 7af18234d7d171a946925e65e987fd51648be3aa /include | |
| parent | 19da3dd157f8db6fe727ff268dab4791d55a6371 (diff) | |
| download | linux-stable-4af5a2f770cc8575840ccb1514ec76ecb592985c.tar.gz linux-stable-4af5a2f770cc8575840ccb1514ec76ecb592985c.tar.bz2 linux-stable-4af5a2f770cc8575840ccb1514ec76ecb592985c.zip | |
flex_array: add flex_array_shrink function
Add a new function to the flex_array API:
int flex_array_shrink(struct flex_array *fa)
This function will free all unused second-level pages. Since elements are
now poisoned if they are not allocated with __GFP_ZERO, it's possible to
identify parts that consist solely of unused elements.
flex_array_shrink() returns the number of pages freed.
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/flex_array.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/flex_array.h b/include/linux/flex_array.h index 3887b21f883f..f12401e485fe 100644 --- a/include/linux/flex_array.h +++ b/include/linux/flex_array.h @@ -46,5 +46,6 @@ int flex_array_put(struct flex_array *fa, unsigned int element_nr, void *src, gfp_t flags); int flex_array_clear(struct flex_array *fa, unsigned int element_nr); void *flex_array_get(struct flex_array *fa, unsigned int element_nr); +int flex_array_shrink(struct flex_array *fa); #endif /* _FLEX_ARRAY_H */ |