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authorTahsin Erdogan <tahsin@google.com>2017-08-06 07:07:01 +0300
committerTheodore Ts'o <tytso@mit.edu>2017-08-06 07:07:01 +0300
commit9699d4f91d9bd2f70dcc37afe3c9f18145ab2dba (patch)
tree8fc510c6e2da691b84598b8b2cb13aeb92d00288 /fs/ext4/ext4.h
parentec00022030da5761518476096626338bd67df57a (diff)
downloadlinux-9699d4f91d9bd2f70dcc37afe3c9f18145ab2dba.tar.xz
ext4: make xattr inode reads faster
ext4_xattr_inode_read() currently reads each block sequentially while waiting for io operation to complete before moving on to the next block. This prevents request merging in block layer. Add a ext4_bread_batch() function that starts reads for all blocks then optionally waits for them to complete. A similar logic is used in ext4_find_entry(), so update that code to use the new function. Signed-off-by: Tahsin Erdogan <tahsin@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
-rw-r--r--fs/ext4/ext4.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index d50229e92c55..a2bb7d2870e4 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2461,6 +2461,8 @@ extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid);
int ext4_inode_is_fast_symlink(struct inode *inode);
struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int);
struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int);
+int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count,
+ bool wait, struct buffer_head **bhs);
int ext4_get_block_unwritten(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
int ext4_get_block(struct inode *inode, sector_t iblock,