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| author |   zhangjs <zachary@baishancloud.com> | 2019-06-19 23:41:29 -0400 |
|---|---|---|
| committer |   Theodore Ts'o <tytso@mit.edu> | 2019-06-19 23:41:29 -0400 |
| commit | b03755ad6f33b7b8cd7312a3596a2dbf496de6e7 (patch) | |
| tree | 206cf9a475b38dcc9173fcffb0e61c4ba1d66c73 /fs/ext4 | |
| parent | ext4: clean up kerneldoc warnigns when building with W=1 (diff) | |
| download | linux-dev-b03755ad6f33b7b8cd7312a3596a2dbf496de6e7.tar.xz linux-dev-b03755ad6f33b7b8cd7312a3596a2dbf496de6e7.zip | |
ext4: make __ext4_get_inode_loc plug
Add a blk_plug to prevent the inode table readahead from being
submitted as small I/O requests.
Signed-off-by: zhangjs <zachary@baishancloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index ed1d8f9ce5f9..11d7c2e403e9 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4570,6 +4570,7 @@ static int __ext4_get_inode_loc(struct inode *inode, struct buffer_head *bh; struct super_block *sb = inode->i_sb; ext4_fsblk_t block; + struct blk_plug plug; int inodes_per_block, inode_offset; iloc->bh = NULL; @@ -4658,6 +4659,7 @@ make_io: * If we need to do any I/O, try to pre-readahead extra * blocks from the inode table. */ + blk_start_plug(&plug); if (EXT4_SB(sb)->s_inode_readahead_blks) { ext4_fsblk_t b, end, table; unsigned num; @@ -4688,6 +4690,7 @@ make_io: get_bh(bh); bh->b_end_io = end_buffer_read_sync; submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh); + blk_finish_plug(&plug); wait_on_buffer(bh); if (!buffer_uptodate(bh)) { EXT4_ERROR_INODE_BLOCK(inode, block, |