lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Btrfs: Change find_extent_buffer to use TestSetPageLocked

Browse Source 
This makes it possible for callers to check for extent_buffers in cache
without deadlocking against any btree locks held.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-06-25 16:01:31 -04:00
parent e7a84565bc
commit 079899c238
2 changed files with 6 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
fs/btrfs/extent_io.c
View File

@@ -2808,10 +2808,15 @@ struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,
goto lru_add;
for (i = 0; i < num_pages; i++, index++) {
p = find_lock_page(mapping, index);
p = find_get_page(mapping, index);
if (!p) {
goto fail;
}
if (TestSetPageLocked(p)) {
page_cache_release(p);
goto fail;
}
set_page_extent_mapped(p);
mark_page_accessed(p);