From: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
commit 1db913823c0f8360fccbd24ca67eb073966a5ffd upstream (as of v2.6.33-rc6)
We need to release the journal before we do a write_inode. Otherwise
we could deadlock.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
---
fs/ext4/inode.c | 32 ++++++++++++++++++--------------
1 files changed, 18 insertions(+), 14 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 2e3f422..af9b185 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1877,24 +1877,12 @@ repeat:
* later. Real quota accounting is done at pages writeout
* time.
*/
- if (vfs_dq_reserve_block(inode, md_needed + 1)) {
- /*
- * We tend to badly over-estimate the amount of
- * metadata blocks which are needed, so if we have
- * reserved any metadata blocks, try to force out the
- * inode and see if we have any better luck.
- */
- if (md_reserved && retries++ <= 3)
- goto retry;
+ if (vfs_dq_reserve_block(inode, md_needed + 1))
return -EDQUOT;
- }
if (ext4_claim_free_blocks(sbi, md_needed + 1)) {
vfs_dq_release_reservation_block(inode, md_needed + 1);
if (ext4_should_retry_alloc(inode->i_sb, &retries)) {
- retry:
- if (md_reserved)
- write_inode_now(inode, (retries == 3));
yield();
goto repeat;
}
@@ -3075,7 +3063,7 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
- int ret, retries = 0;
+ int ret, retries = 0, quota_retries = 0;
struct page *page;
pgoff_t index;
unsigned from, to;
@@ -3134,6 +3122,22 @@ retry:
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry;
+
+ if ((ret == -EDQUOT) &&
+ EXT4_I(inode)->i_reserved_meta_blocks &&
+ (quota_retries++ < 3)) {
+ /*
+ * Since we often over-estimate the number of meta
+ * data blocks required, we may sometimes get a
+ * spurios out of quota error even though there would
+ * be enough space once we write the data blocks and
+ * find out how many meta data blocks were _really_
+ * required. So try forcing the inode write to see if
+ * that helps.
+ */
+ write_inode_now(inode, (quota_retries == 3));
+ goto retry;
+ }
out:
return ret;
}
--
1.6.6.1.1.g974db.dirty
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