From: Mingming <cmm@us.ibm.com>
To: Jan Kara <jack@suse.cz>, tytso@mit.edu
Cc: linux-ext4@vger.kernel.org
Subject: [PATCH] Ext4: avoid multiple quota reservation when retry block reservation for delalloc
Date: Mon, 21 Sep 2009 09:52:30 -0700 [thread overview]
Message-ID: <1253551950.9099.10.camel@mingming-laptop> (raw)
Ext4: release reserved quota before block reservation for delalloc retry
ext4_da_reserve_space() can reserve quota blocks multiple times if
ext4_claim_free_blocks() fail and we retry the allocation. We should
release the quota reservation before restarting.
Bug found be Jan Kara.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
---
fs/ext4/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-2.6.31-rc4/fs/ext4/inode.c
===================================================================
--- linux-2.6.31-rc4.orig/fs/ext4/inode.c
+++ linux-2.6.31-rc4/fs/ext4/inode.c
@@ -1785,11 +1785,11 @@ repeat:
if (ext4_claim_free_blocks(sbi, total)) {
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
+ vfs_dq_release_reservation_block(inode, total);
if (ext4_should_retry_alloc(inode->i_sb, &retries)) {
yield();
goto repeat;
}
- vfs_dq_release_reservation_block(inode, total);
return -ENOSPC;
}
EXT4_I(inode)->i_reserved_data_blocks += nrblocks;
next reply other threads:[~2009-09-21 16:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-21 16:52 Mingming [this message]
2009-09-21 18:15 ` [PATCH] Ext4: avoid multiple quota reservation when retry block reservation for delalloc Jan Kara
2009-09-21 23:18 ` Mingming
2009-09-28 14:49 ` Theodore Tso
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