* [PATCH V6 1/3] btrfs: fix wrong allocating flag when reading page
@ 2011-04-22 10:12 Miao Xie
0 siblings, 0 replies; only message in thread
From: Miao Xie @ 2011-04-22 10:12 UTC (permalink / raw)
To: Chris Mason; +Cc: Linux Btrfs, Itaru Kitayama
From: Itaru Kitayama <kitayama@cl.bb4u.ne.jp>
the space cache use extent_readpages() to read free space information,
so we can not use GFP_KERNEL flag to allocate memory, or it may lead
to deadlock.
Signed-off-by: Itaru Kitayama <kitayama@cl.bb4u.ne.jp>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
---
fs/btrfs/extent_io.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 5ae0bff..0d1196d 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2681,7 +2681,7 @@ 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);
}
--
1.7.4
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2011-04-22 10:12 [PATCH V6 1/3] btrfs: fix wrong allocating flag when reading page Miao Xie
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