commit 7f3c74fb831fa19bafe087e817c0a5ff3883f1ea
author Chris Mason <chris.mason@oracle.com> Fri Jul 18 12:01:11 2008 -0400
committer Chris Mason <chris.mason@oracle.com> Thu Sep 25 11:04:05 2008 -0400
tree 416e95db10e408240916d5061caf1e5d1182b330
parent 211f90e68b679d27fe23c5505f86d6ce62c98bae

Btrfs: Keep extent mappings in ram until pending ordered extents are done

It was possible for stale mappings from disk to be used instead of the
new pending ordered extent.  This adds a flag to the extent map struct
to keep it pinned until the pending ordered extent is actually on disk.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/file-item.c

diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index e02f1e5..d9c69e1 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -192,7 +192,6 @@
 				 (char *)&sector_sum->sum);
 		sector_sum->offset = page_offset(bvec->bv_page) +
 			bvec->bv_offset;
-
 		sector_sum++;
 		bio_index++;
 		total_bytes += bvec->bv_len;
@@ -201,9 +200,6 @@
 	}
 	btrfs_add_ordered_sum(inode, ordered, sums);
 	btrfs_put_ordered_extent(ordered);
-	if (total_bytes != bio->bi_size) {
-printk("warning, total bytes %lu bio size %u\n", total_bytes, bio->bi_size);
-	}
 	return 0;
 }
 
@@ -372,6 +368,7 @@
 		write_extent_buffer(leaf, &sector_sum->sum,
 				    (unsigned long)item, BTRFS_CRC32_SIZE);
 	}
+
 	total_bytes += root->sectorsize;
 	sector_sum++;
 	if (total_bytes < sums->len) {