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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-07-27 01:26:02 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-27 02:19:19 +0300
commitc78c66d1ddfdbd2353f3fcfeba0268524537b096 (patch)
treead77c4f365bd7f84203b9d5f53274016657bc00f /include/linux/radix-tree.h
parente2f0a0db95979a4aa951d883248da9d361507abf (diff)
downloadlinux-c78c66d1ddfdbd2353f3fcfeba0268524537b096.tar.xz
radix-tree: implement radix_tree_maybe_preload_order()
The new helper is similar to radix_tree_maybe_preload(), but tries to preload number of nodes required to insert (1 << order) continuous naturally-aligned elements. This is required to push huge pages into pagecache. Link: http://lkml.kernel.org/r/1466021202-61880-24-git-send-email-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/radix-tree.h')
-rw-r--r--include/linux/radix-tree.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index eca6f626c16e..cbfee507c839 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -291,6 +291,7 @@ unsigned int radix_tree_gang_lookup_slot(struct radix_tree_root *root,
unsigned long first_index, unsigned int max_items);
int radix_tree_preload(gfp_t gfp_mask);
int radix_tree_maybe_preload(gfp_t gfp_mask);
+int radix_tree_maybe_preload_order(gfp_t gfp_mask, int order);
void radix_tree_init(void);
void *radix_tree_tag_set(struct radix_tree_root *root,
unsigned long index, unsigned int tag);