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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>
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1 changed files with 3 additions and 0 deletions
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@ -4570,6 +4570,7 @@ static int __ext4_get_inode_loc(struct inode *inode,
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struct buffer_head *bh;
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struct super_block *sb = inode->i_sb;
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ext4_fsblk_t block;
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struct blk_plug plug;
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int inodes_per_block, inode_offset;
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iloc->bh = NULL;
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@ -4658,6 +4659,7 @@ static int __ext4_get_inode_loc(struct inode *inode,
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* If we need to do any I/O, try to pre-readahead extra
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* blocks from the inode table.
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*/
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blk_start_plug(&plug);
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if (EXT4_SB(sb)->s_inode_readahead_blks) {
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ext4_fsblk_t b, end, table;
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unsigned num;
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@ -4688,6 +4690,7 @@ static int __ext4_get_inode_loc(struct inode *inode,
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get_bh(bh);
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bh->b_end_io = end_buffer_read_sync;
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submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh);
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blk_finish_plug(&plug);
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wait_on_buffer(bh);
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if (!buffer_uptodate(bh)) {
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EXT4_ERROR_INODE_BLOCK(inode, block,
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