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Btrfs: make sure that we've made everything in pinned tree clean

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Since we have two trees for recording pinned extents, we need to go through
both of them to make sure that we've done everything clean.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Liu Bo 2012-06-14 02:23:21 -06:00 committed by Chris Mason
parent 6e841e32b1
commit ed0eaa1498
1 changed files with 11 additions and 0 deletions
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11
fs/btrfs/disk-io.c
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@ -3557,8 +3557,10 @@ static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
u64 start; u64 start;
u64 end; u64 end;
int ret; int ret;
bool loop = true;
unpin = pinned_extents; unpin = pinned_extents;
again:
while (1) { while (1) {
ret = find_first_extent_bit(unpin, 0, &start, &end, ret = find_first_extent_bit(unpin, 0, &start, &end,
EXTENT_DIRTY); EXTENT_DIRTY);
@ -3576,6 +3578,15 @@ static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
cond_resched(); cond_resched();
} }
if (loop) {
if (unpin == &root->fs_info->freed_extents[0])
unpin = &root->fs_info->freed_extents[1];
else
unpin = &root->fs_info->freed_extents[0];
loop = false;
goto again;
}
return 0; return 0;
} }