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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2008-09-08 23:14:50 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-09-08 23:14:50 -0400
commit030ba6bc67b4f2bc5cd174f57785a1745c929abe (patch)
tree14c57b4f6f8afddac0bd2415bfa050fba8d25980 /fs/ext4/balloc.c
parenta30d542a0035b886ffaafd0057ced0a2b28c3a4f (diff)
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ext4: Retry block reservation
During block reservation if we don't have enough blocks left, retry block reservation with smaller block counts. This makes sure we try fallocate and DIO with smaller request size and don't fail early. The delayed allocation reservation cannot try with smaller block count. So retry block reservation to handle temporary disk full conditions. Also print free blocks details if we fail block allocation during writepages. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/balloc.c')
-rw-r--r--fs/ext4/balloc.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 1707850..5790988 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -1738,10 +1738,16 @@ ext4_fsblk_t ext4_old_new_blocks(handle_t *handle, struct inode *inode,
/*
* With delalloc we already reserved the blocks
*/
- if (ext4_claim_free_blocks(sbi, *count)) {
+ while (*count && ext4_claim_free_blocks(sbi, *count)) {
+ /* let others to free the space */
+ yield();
+ *count = *count >> 1;
+ }
+ if (!*count) {
*errp = -ENOSPC;
return 0; /*return with ENOSPC error */
}
+ num = *count;
}
/*
* Check quota for allocation of this block.