Btrfs: Data ordered fixes
* In btrfs_delete_inode, wait for ordered extents after calling
truncate_inode_pages. This is much faster, and more correct
* Properly clear our the PageChecked bit everywhere we redirty the page.
* Change the writepage fixup handler to lock the page range and check to
see if an ordered extent had been inserted since the improperly dirtied
page was discovered
* Wait for ordered extents outside the transaction. This isn't required
for locking rules but does improve transaction latencies
* Reduce contention on the alloc_mutex by dropping it while incrementing
refs on a node/leaf and while dropping refs on a leaf.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index c2b4a9c..0d87795 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -336,7 +336,7 @@
orig_end = start + len - 1;
wait_end = orig_end;
}
-
+again:
/* start IO across the range first to instantiate any delalloc
* extents
*/
@@ -369,6 +369,14 @@
break;
end--;
}
+ if (test_range_bit(&BTRFS_I(inode)->io_tree, start, orig_end,
+ EXTENT_ORDERED | EXTENT_DELALLOC, 0)) {
+ printk("inode %lu still ordered or delalloc after wait "
+ "%llu %llu\n", inode->i_ino,
+ (unsigned long long)start,
+ (unsigned long long)orig_end);
+ goto again;
+ }
}
/*
@@ -545,7 +553,6 @@
sector_sums = &ordered_sum->sums;
for (i = 0; i < num_sectors; i++) {
if (sector_sums[i].offset == offset) {
-printk("find ordered sum inode %lu offset %Lu\n", inode->i_ino, offset);
*sum = sector_sums[i].sum;
ret = 0;
goto out;