Re: [PATCH v2 v2 2/2] ext4: allow clearing mballoc stats through mb_stats

[Ojaswin Mujoo]

On Sun, Apr 19, 2026 at 02:34:36PM +0800, Baolin Liu wrote:
> From: Baolin Liu <liubaolin@xxxxxxxxxx>
> 
> Make /proc/fs/ext4/<dev>/mb_stats writable and clear the runtime
> mballoc statistics when 0 is written.
> 
> Signed-off-by: Baolin Liu <liubaolin@xxxxxxxxxx>
> ---
Hi Baolin, thanks for the changes.

Seems like userspace doesn't have any way to know that writing 0 will
clear the that. Well, I guess if you are looking at this file you are
anyways debugging kernel code so that should be fine

Feel free to add:

Ojaswin Mujoo <ojaswin@xxxxxxxxxxxxx>

Regards,
ojaswin


>  fs/ext4/ext4.h    |  1 +
>  fs/ext4/mballoc.c | 29 +++++++++++++++++++++++++++++
>  fs/ext4/sysfs.c   | 40 ++++++++++++++++++++++++++++++++++++++--
>  3 files changed, 68 insertions(+), 2 deletions(-)
>