From: Johannes Thumshirn <johannes.thumshirn@xxxxxxx> commit e6d261e3b1f777b499ce8f535ed44dd1b69278b7 upstream Now that we have a dedicated block group for relocation, we can use REQ_OP_WRITE instead of REQ_OP_ZONE_APPEND for writing out the data on relocation. Reviewed-by: Naohiro Aota <naohiro.aota@xxxxxxx> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx> Reviewed-by: David Sterba <dsterba@xxxxxxxx> Signed-off-by: David Sterba <dsterba@xxxxxxxx> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/btrfs/zoned.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -1304,6 +1304,17 @@ bool btrfs_use_zone_append(struct btrfs_ if (!is_data_inode(&inode->vfs_inode)) return false; + /* + * Using REQ_OP_ZONE_APPNED for relocation can break assumptions on the + * extent layout the relocation code has. + * Furthermore we have set aside own block-group from which only the + * relocation "process" can allocate and make sure only one process at a + * time can add pages to an extent that gets relocated, so it's safe to + * use regular REQ_OP_WRITE for this special case. + */ + if (btrfs_is_data_reloc_root(inode->root)) + return false; + cache = btrfs_lookup_block_group(fs_info, start); ASSERT(cache); if (!cache)
