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| author |   Jan Kara <jack@suse.cz> | 2010-08-24 14:28:03 +0200 |
|---|---|---|
| committer |   Tao Ma <tao.ma@oracle.com> | 2010-09-08 14:25:57 +0800 |
| commit | 9b4c0ff32ccd87ab52d4c5bd0a0536febce11370 (patch) | |
| tree | b9e77d2798eac9051353b29f22e9315d9d9e13b5 /fs/ocfs2/refcounttree.c | |
| parent | ocfs2: properly set and use inode group alloc hint (diff) | |
| download | linux-dev-9b4c0ff32ccd87ab52d4c5bd0a0536febce11370.tar.xz linux-dev-9b4c0ff32ccd87ab52d4c5bd0a0536febce11370.zip | |
ocfs2: Fix deadlock when allocating page
We cannot call grab_cache_page() when holding filesystem locks or with
a transaction started as grab_cache_page() calls page allocation with
GFP_KERNEL flag and thus page reclaim can recurse back into the filesystem
causing deadlocks or various assertion failures. We have to use
find_or_create_page() instead and pass it GFP_NOFS as we do with other
allocations.
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/ocfs2/refcounttree.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c index 73a11ccfd4c2..0afeda83120f 100644 --- a/fs/ocfs2/refcounttree.c +++ b/fs/ocfs2/refcounttree.c @@ -2960,7 +2960,7 @@ static int ocfs2_duplicate_clusters_by_page(handle_t *handle, if (map_end & (PAGE_CACHE_SIZE - 1)) to = map_end & (PAGE_CACHE_SIZE - 1); - page = grab_cache_page(mapping, page_index); + page = find_or_create_page(mapping, page_index, GFP_NOFS); /* * In case PAGE_CACHE_SIZE <= CLUSTER_SIZE, This page @@ -3179,7 +3179,8 @@ static int ocfs2_cow_sync_writeback(struct super_block *sb, if (map_end > end) map_end = end; - page = grab_cache_page(context->inode->i_mapping, page_index); + page = find_or_create_page(context->inode->i_mapping, + page_index, GFP_NOFS); BUG_ON(!page); wait_on_page_writeback(page); |