From 85db36cfb3de1422aeafb4e2ce83396333b744bb Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Thu, 23 Apr 2015 08:02:49 -0700 Subject: [PATCH] Btrfs: fix inode cache writeout The code to fix stalls during free spache cache IO wasn't using the correct root when waiting on the IO for inode caches. This is only a problem when the inode cache is enabled with mount -o inode_cache This fixes the inode cache writeout to preserve any error values and makes sure not to override the root when inode cache writeout is done. Reported-by: Filipe Manana Signed-off-by: Chris Mason --- fs/btrfs/free-space-cache.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index 253cb74b0e27..d773f229d14d 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -1149,7 +1149,8 @@ int btrfs_wait_cache_io(struct btrfs_root *root, if (!inode) return 0; - root = root->fs_info->tree_root; + if (block_group) + root = root->fs_info->tree_root; /* Flush the dirty pages in the cache file. */ ret = flush_dirty_cache(inode); @@ -3463,9 +3464,12 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root, if (!btrfs_test_opt(root, INODE_MAP_CACHE)) return 0; + memset(&io_ctl, 0, sizeof(io_ctl)); ret = __btrfs_write_out_cache(root, inode, ctl, NULL, &io_ctl, - trans, path, 0) || - btrfs_wait_cache_io(root, trans, NULL, &io_ctl, path, 0); + trans, path, 0); + if (!ret) + ret = btrfs_wait_cache_io(root, trans, NULL, &io_ctl, path, 0); + if (ret) { btrfs_delalloc_release_metadata(inode, inode->i_size); #ifdef DEBUG