[V2] btrfs: fix possible deadlock by clearing __GFP_FS flag

Commit Message

Itaru Kitayama March 29, 2011, 5:48 a.m. UTC

None

Patch

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 8862dda..03e5ab3 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2641,7 +2641,7 @@  int extent_readpages(struct extent_io_tree *tree,
                prefetchw(&page->flags);
                list_del(&page->lru);
                if (!add_to_page_cache_lru(page, mapping,
-                                       page->index, GFP_KERNEL)) {
+                                       page->index, GFP_NOFS)) {
                        __extent_read_full_page(tree, page, get_extent,
                                                &bio, 0, &bio_flags);
                }