| From ff63e19060e0fc2fadab863a9c20be54f2d55b35 Mon Sep 17 00:00:00 2001 |
| From: Eric Sandeen <sandeen@redhat.com> |
| Date: Fri, 2 Oct 2009 21:20:55 -0400 |
| Subject: [PATCH 51/85] ext4: retry failed direct IO allocations |
| |
| (cherry picked from commit fbbf69456619de5d251cb9f1df609069178c62d5) |
| |
| On a 256M filesystem, doing this in a loop: |
| |
| xfs_io -F -f -d -c 'pwrite 0 64m' test |
| rm -f test |
| |
| eventually leads to ENOSPC. (the xfs_io command does a |
| 64m direct IO write to the file "test") |
| |
| As with other block allocation callers, it looks like we need to |
| potentially retry the allocations on the initial ENOSPC. |
| |
| Signed-off-by: Eric Sandeen <sandeen@redhat.com> |
| Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| --- |
| fs/ext4/inode.c | 4 ++++ |
| 1 file changed, 4 insertions(+) |
| |
| --- a/fs/ext4/inode.c |
| +++ b/fs/ext4/inode.c |
| @@ -3372,6 +3372,7 @@ static ssize_t ext4_ind_direct_IO(int rw |
| ssize_t ret; |
| int orphan = 0; |
| size_t count = iov_length(iov, nr_segs); |
| + int retries = 0; |
| |
| if (rw == WRITE) { |
| loff_t final_size = offset + count; |
| @@ -3394,9 +3395,12 @@ static ssize_t ext4_ind_direct_IO(int rw |
| } |
| } |
| |
| +retry: |
| ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov, |
| offset, nr_segs, |
| ext4_get_block, NULL); |
| + if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) |
| + goto retry; |
| |
| if (orphan) { |
| int err; |
