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authorDavid Rientjes <rientjes@google.com>2009-09-21 17:04:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 07:17:47 -0700
commit4af5a2f770cc8575840ccb1514ec76ecb592985c (patch)
tree7af18234d7d171a946925e65e987fd51648be3aa /include/linux/flex_array.h
parent19da3dd157f8db6fe727ff268dab4791d55a6371 (diff)
downloadop-kernel-dev-4af5a2f770cc8575840ccb1514ec76ecb592985c.zip
op-kernel-dev-4af5a2f770cc8575840ccb1514ec76ecb592985c.tar.gz
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/linux/flex_array.h')
-rw-r--r--include/linux/flex_array.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/flex_array.h b/include/linux/flex_array.h
index 3887b21..f12401e 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 */
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