Enabling XFS realtime subvolume (XFS_RT) is mandatory to support zoned block devices. If CONFIG_BLK_DEV_ZONED is enabled, automatically select CONFIG_XFS_RT to allow users to format zoned block devices using XFS. Also improve the description of the XFS_RT configuration option to document that it is reuired for zoned block devices. Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx> --- fs/xfs/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig index ae0ca6858496..c77118e96b82 100644 --- a/fs/xfs/Kconfig +++ b/fs/xfs/Kconfig @@ -5,6 +5,7 @@ config XFS_FS select EXPORTFS select CRC32 select FS_IOMAP + select XFS_RT if BLK_DEV_ZONED help XFS is a high performance journaling filesystem which originated on the SGI IRIX platform. It is completely multi-threaded, can @@ -116,6 +117,15 @@ config XFS_RT from all other requests, and this can be done quite transparently to applications via the inherit-realtime directory inode flag. + This option is mandatory to support zoned block devices. For these + devices, the realtime subvolume must be backed by a zoned block + device and a regular block device used as the main device (for + metadata). If the zoned block device is a host-managed SMR hard-disk + containing conventional zones at the beginning of its address space, + XFS will use the disk conventional zones as the main device and the + remaining sequential write required zones as the backing storage for + the realtime subvolume. + See the xfs man page in section 5 for additional information. If unsure, say N. -- 2.50.1
