iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Btrfs: Fix new state initialization order

Browse Source 
As the extent state tree is manipulated, there are call backs
that are used to take extra actions when different state bits are set
or cleared.  One example of this is a counter for the total number
of delayed allocation bytes in a single inode and in the whole FS.

When new states are inserted, this callback is being done before we
properly setup the new state.  This hasn't caused problems before
because the lock bit was always done first, and the existing call backs
don't care about the lock bit.

This patch makes sure the state is properly setup before using the
callback, which is important for later optimizations that do more work
without using the lock bit.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2009-09-11 11:25:02 -04:00
parent 890871be85
commit e48c465bb3
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/btrfs/extent_io.c
View File

@ -367,10 +367,10 @@ static int insert_state(struct extent_io_tree *tree,
}
if (bits & EXTENT_DIRTY)
tree->dirty_bytes += end - start + 1;
set_state_cb(tree, state, bits);
state->state |= bits;
state->start = start;
state->end = end;
set_state_cb(tree, state, bits);
state->state |= bits;
node = tree_insert(&tree->state, end, &state->rb_node);
if (node) {
struct extent_state *found;