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authorJosef Bacik <josef@redhat.com>2010-02-03 19:33:23 +0000
committerChris Mason <chris.mason@oracle.com>2010-03-15 11:00:13 -0400
commit2ac55d41b5d6bf49e76bc85db5431240617e2f8f (patch)
treeee8e2a716ef0b50388ef5e4a86387ec0499bca89 /fs/btrfs/extent_io.h
parent5a1a3df1f6c86926cfe8657e6f9b4b4c2f467d60 (diff)
downloadop-kernel-dev-2ac55d41b5d6bf49e76bc85db5431240617e2f8f.zip
op-kernel-dev-2ac55d41b5d6bf49e76bc85db5431240617e2f8f.tar.gz
Btrfs: cache the extent state everywhere we possibly can V2
This patch just goes through and fixes everybody that does lock_extent() blah unlock_extent() to use lock_extent_bits() blah unlock_extent_cached() and pass around a extent_state so we only have to do the searches once per function. This gives me about a 3 mb/s boots on my random write test. I have not converted some things, like the relocation and ioctl's, since they aren't heavily used and the relocation stuff is in the middle of being re-written. I also changed the clear_extent_bit() to only unset the cached state if we are clearing EXTENT_LOCKED and related stuff, so we can do things like this lock_extent_bits() clear delalloc bits unlock_extent_cached() without losing our cached state. I tested this thoroughly and turned on LEAK_DEBUG to make sure we weren't leaking extent states, everything worked out fine. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_io.h')
-rw-r--r--fs/btrfs/extent_io.h10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 36de250..bbab481 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -163,6 +163,8 @@ int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
int bits, struct extent_state **cached, gfp_t mask);
int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
+int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
+ struct extent_state **cached, gfp_t mask);
int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask);
int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
@@ -196,7 +198,7 @@ int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start,
u64 end, gfp_t mask);
int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
- gfp_t mask);
+ struct extent_state **cached_state, gfp_t mask);
int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask);
int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
@@ -281,9 +283,11 @@ int test_extent_buffer_dirty(struct extent_io_tree *tree,
int set_extent_buffer_uptodate(struct extent_io_tree *tree,
struct extent_buffer *eb);
int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
- struct extent_buffer *eb);
+ struct extent_buffer *eb,
+ struct extent_state **cached_state);
int extent_buffer_uptodate(struct extent_io_tree *tree,
- struct extent_buffer *eb);
+ struct extent_buffer *eb,
+ struct extent_state *cached_state);
int map_extent_buffer(struct extent_buffer *eb, unsigned long offset,
unsigned long min_len, char **token, char **map,
unsigned long *map_start,
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