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btrfs: Adjust commit-transaction condition to avoid NO_SPACE more

Message ID 1424166120-6394-1-git-send-email-zhaolei@cn.fujitsu.com (mailing list archive)
State Superseded
Headers show

Commit Message

Zhaolei Feb. 17, 2015, 9:42 a.m. UTC 
From: Zhao Lei <zhaolei@cn.fujitsu.com>

If we have any chance to make a successful write, we should not give up.

This patch adjust commit-transaction condition from:
  pinned >= wanted
to
  left + pinned >= wanted

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
---
 fs/btrfs/extent-tree.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 414d533..4ffce64 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3751,7 +3751,8 @@  alloc:
 		 * don't bother committing the transaction.
 		 */
 		if (percpu_counter_compare(&data_sinfo->total_bytes_pinned,
-					   bytes) < 0)
+					   used + bytes -
+					   data_sinfo->total_bytes) < 0)
 			have_pinned_space = 0;
 		spin_unlock(&data_sinfo->lock);