Actually, it seems odd to use a min setting and configure it to map to
SYSCTL_ONE to SYSCTL_ONE so just a SYCTL_$(type)_MAX or just the type max
would be better and not break old userspace.

On Wed, Mar 8, 2023, 7:56 PM Luis Chamberlain <mcgrof@kernel.org> wrote:

> On Thu, Mar 09, 2023 at 11:42:58AM +0800, ye.xingchen@zte.com.cn wrote:
> > From: Minghao Chi <chi.minghao@zte.com.cn>
> >
> > Available only when CONFIG_COMPACTION is set. When 1 is written to
> > the file, all zones are compacted such that free memory is available
> > in contiguous blocks where possible.
> > But echo others-parameter > compact_memory, this function will be
> > triggered by writing parameters to the interface.
> >
> > Applied this patch,
> > sh/$ echo 1.1 > /proc/sys/vm/compact_memory
> > sh/$ sh: write error: Invalid argument
>
> Didn't echo 2 > /proc/sys/vm/compact_memory used to work too?
>
> Why kill that? Did the docs say only 1 was possible? If not
> perhaps the docs need to be updated?
>
>   Luis
>
>