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authorZheng Liu <wenqing.lz@taobao.com>2014-11-25 11:44:37 -0500
committerTheodore Ts'o <tytso@mit.edu>2014-11-25 11:44:37 -0500
commit2f8e0a7c6c89f850ebd5d6c0b9a08317030d1b89 (patch)
tree4e03e95c516bab8be44e23861626f0c0f29a3958 /include/trace
parentcbd7584e6ead1b79fb0b81573f158b57fa1f0b49 (diff)
ext4: cache extent hole in extent status tree for ext4_da_map_blocks()
Currently extent status tree doesn't cache extent hole when a write looks up in extent tree to make sure whether a block has been allocated or not. In this case, we don't put extent hole in extent cache because later this extent might be removed and a new delayed extent might be added back. But it will cause a defect when we do a lot of writes. If we don't put extent hole in extent cache, the following writes also need to access extent tree to look at whether or not a block has been allocated. It brings a cache miss. This commit fixes this defect. Also if the inode doesn't have any extent, this extent hole will be cached as well. Cc: Andreas Dilger <adilger.kernel@dilger.ca> Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/ext4.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index bb7dcbe99652..cd37a584ee88 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -43,8 +43,7 @@ struct extent_status;
{ EXT4_GET_BLOCKS_METADATA_NOFAIL, "METADATA_NOFAIL" }, \
{ EXT4_GET_BLOCKS_NO_NORMALIZE, "NO_NORMALIZE" }, \
{ EXT4_GET_BLOCKS_KEEP_SIZE, "KEEP_SIZE" }, \
- { EXT4_GET_BLOCKS_NO_LOCK, "NO_LOCK" }, \
- { EXT4_GET_BLOCKS_NO_PUT_HOLE, "NO_PUT_HOLE" })
+ { EXT4_GET_BLOCKS_NO_LOCK, "NO_LOCK" })
#define show_mflags(flags) __print_flags(flags, "", \
{ EXT4_MAP_NEW, "N" }, \

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