From b6d08f0630d51ec09d67f16f6d7839699bbc0402 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Fri, 27 Sep 2013 14:57:43 -0400 Subject: [PATCH] Btrfs: do not release metadata for space cache inodes I've been testing our error paths and I was tripping the BUG_ON() in drop_outstanding_extent because our outstanding_extents is 0 for space cache inodes. This is because we don't reserve metadata space for these inodes since we depend on the global block reserve for our space. To fix this we need to make sure the DO_ACCOUNTING stuff doesn't actually call release_metadata for space cache inodes. With this patch I'm no longer panicing. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/inode.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 939dd1ff34a7..c0dcb4c3d72d 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1551,7 +1551,13 @@ static void btrfs_clear_bit_hook(struct inode *inode, spin_unlock(&BTRFS_I(inode)->lock); } - if (*bits & EXTENT_DO_ACCOUNTING) + /* + * We don't reserve metadata space for space cache inodes so we + * don't need to call dellalloc_release_metadata if there is an + * error. + */ + if (*bits & EXTENT_DO_ACCOUNTING && + root != root->fs_info->tree_root) btrfs_delalloc_release_metadata(inode, len); if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID -- 2.20.1