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Btrfs: Data ordered fixes

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* 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>
This commit is contained in:
Chris Mason
2008-07-21 10:29:44 -04:00
parent e5a2217ef6
commit 4a09675279
4 changed files with 43 additions and 10 deletions
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11
fs/btrfs/ordered-data.c
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@@ -336,7 +336,7 @@ void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
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 @@ void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
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 @@ int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u32 *sum)
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;