Re: [PATCH v3 3/3] generic: basic smoke for filesystems on zoned block devices

[Johannes Thumshirn <Johannes.Thumshirn@wdc.com>]

On 10/13/25 3:55 PM, Anand Jain wrote:
> Johannes,
>
> The test case is failing with XFS. For some reason, the mkfs error
> wasn't captured in the output, so I had to modify the test slightly.
> Errors and the diff is below.
>
> Thanks, Anand
>
> -------
> SECTION       -- generic-config
> RECREATING    -- xfs on /dev/sde
> FSTYP         -- xfs (non-debug)
> PLATFORM      -- Linux/x86_64 feddev 6.16.10-100.fc41.x86_64 #1 SMP
> PREEMPT_DYNAMIC Thu Oct  2 18:19:14 UTC 2025
> MKFS_OPTIONS  -- -f /dev/sda
> MOUNT_OPTIONS -- /dev/sda /mnt/scratch
>
> generic/772       [not run] cannot mkfs zoned filesystem
> Ran: generic/772
> Not run: generic/772
> Passed all 1 tests

Hi Anand,

Looking at the output it isn't failing but skipped on your XFS config.


This is expected if XFS isn't build with support for the zoned realtime 
device. I've been discussing this with Christoph, because for XFS there 
is no feature flag in sysfs we can check if the kernel can actually 
support a zoned RT device (unlike f2fs or btrfs which do have this in 
sysfs).

Christoph's idea was to do exactly this, if no zoned RT support is 
compiled in the kernel. Hence the _try_mkfs_dev instead of a plain 
_mkfs_dev call.

So I /think/ you just validated that the skip if !CONFIG_BLK_DEV_ZONED 
&& !CONFIG_XFS_RT check works.

Thanks,

Johannes