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authorEric Sandeen2009-10-02 21:20:55 -0400
committerTheodore Ts'o2009-10-02 21:20:55 -0400
commitfbbf69456619de5d251cb9f1df609069178c62d5 (patch)
treee0a5bc75a02dda7f46ba4d0e838c54f39b1fe4f6
parent74072d0a63553720dd3c70a8b8e9407eb2027dbe (diff)
[PATCH] ext4: retry failed direct IO allocations
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>
-rw-r--r--fs/ext4/inode.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 635f8ec6ebc6..5c5bc5dafff8 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3378,6 +3378,7 @@ static ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
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;
@@ -3400,9 +3401,12 @@ static ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
}
}
+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;