diff options
Diffstat (limited to 'fs/ext4/dir.c')
| -rw-r--r-- | fs/ext4/dir.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index e8ad06e2831..0a872a09fed 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -135,12 +135,14 @@ static int ext4_readdir(struct file * filp, map_bh.b_state = 0; err = ext4_get_blocks_wrap(NULL, inode, blk, 1, &map_bh, 0, 0); if (err > 0) { - page_cache_readahead(sb->s_bdev->bd_inode->i_mapping, - &filp->f_ra, - filp, - map_bh.b_blocknr >> - (PAGE_CACHE_SHIFT - inode->i_blkbits), - 1); + pgoff_t index = map_bh.b_blocknr >> + (PAGE_CACHE_SHIFT - inode->i_blkbits); + if (!ra_has_index(&filp->f_ra, index)) + page_cache_readahead_ondemand( + sb->s_bdev->bd_inode->i_mapping, + &filp->f_ra, filp, + NULL, index, 1); + filp->f_ra.prev_index = index; bh = ext4_bread(NULL, inode, blk, 0, &err); } |