diff options
| -rw-r--r-- | fs/btrfs/extent_io.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index e498d496560b..133ff4531472 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -5284,10 +5284,19 @@ free_eb: } #endif -static struct extent_buffer *grab_extent_buffer(struct page *page) +static struct extent_buffer *grab_extent_buffer( + struct btrfs_fs_info *fs_info, struct page *page) { struct extent_buffer *exists; + /* + * For subpage case, we completely rely on radix tree to ensure we + * don't try to insert two ebs for the same bytenr. So here we always + * return NULL and just continue. + */ + if (fs_info->sectorsize < PAGE_SIZE) + return NULL; + /* Page not yet attached to an extent buffer */ if (!PagePrivate(page)) return NULL; @@ -5373,7 +5382,7 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, } spin_lock(&mapping->private_lock); - exists = grab_extent_buffer(p); + exists = grab_extent_buffer(fs_info, p); if (exists) { spin_unlock(&mapping->private_lock); unlock_page(p); |