| Message ID | 1433851712-22175-1-git-send-email-chandan@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index ca5d968..3ddd74a 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1368,7 +1368,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file, ra_index = max(i, ra_index); btrfs_force_ra(inode->i_mapping, ra, file, ra_index, cluster); - ra_index += max_cluster; + ra_index += cluster; } mutex_lock(&inode->i_mutex);
Read-ahead is done for the pages in the range [ra_index, ra_index + cluster - 1]. So the next read-ahead should be starting from the page at index 'ra_index + cluster' (unless we deemed that the extent at 'ra_index + cluster' as non-defraggable) rather than from the page at index 'ra_index + max_cluster'. This patch fixes this. I did run the xfstests suite to make sure that the code does not regress. Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com> --- fs/btrfs/ioctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)