Re: [RFC PATCH 0/1] Add default config file for mkfs.xfs

["Darrick J. Wong" <djwong@kernel.org>]

[add ted to cc]

On Thu, May 14, 2026 at 04:37:16PM +0200, Lukas Herbolt wrote:
> Hi all,
> The default values cannot always satisfy everybody and users/packagers
> should be able to override defaults without the need of specifying
> configuration file on command line. It was previously discussed in
> here [1]. 

Hmm.  A long time ago Ted asked for a slghtly different alteration to
help him make running fstests easier.  What he wanted iirc was a way to
install a set of default mkfs settings from a config file, but still
allow the settings to be overridden by cli arguments.

Apparently I never sent the patch because it doesn't exist in lore, so I
suppose I should send it now. ;)

> The proposed patch adds /etc/mkfs.xfs.conf where the default values
> can be set.  It also lightly changes the default behavior for -l/-d/-r
> concurrency allowing now to be set to -1 to keep autodetection on
> SSDs.

I don't think I like magic negative numbers, but I'll save that for my
reply to the actual patch.

--D

> https://lore.kernel.org/linux-xfs/84c8a5e5-938d-4745-996d-4237009c9cc5@sandeen.net/
> 
> Lukas Herbolt (1):
>   xfsprogs: mkfs.xfs add default configuration file.
> 
>  include/builddefs.in |  1 +
>  mkfs/Makefile        |  3 ++
>  mkfs/mkfs.xfs.conf   | 50 ++++++++++++++++++++++++++++++
>  mkfs/xfs_mkfs.c      | 72 +++++++++++++++++++++++++++++++++++++++-----
>  4 files changed, 119 insertions(+), 7 deletions(-)
>  create mode 100644 mkfs/mkfs.xfs.conf
> 
> -- 
> 2.54.0
> 
>