Re: [PATCH v5 8/8] mm: huge_memory: enable debugfs to split huge pages to any order.

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On Fri, Mar 01, 2024 at 07:56:41AM -0500, Zi Yan wrote:
> On 1 Mar 2024, at 7:11, Mark Brown wrote:

> > Mounting on /mnt would also be a bit of an issue, that's something
> > people are relatively likely to have used for something so could be
> > disruptive.  If the test is going to do a new mount it's probably better
> > to do something like make a temporary directory then mount on top of that.

> To move it to a temp folder for mounting, the test needs to do the mount.
> But it is impossible to know if the running environment has the required FS or not
> and where the FS is. Should I add that as a parameter to the test binary?

You can check the supported filesystem types in /proc/filesystems
(possibly also elsewhere, that's just my first thought).  There's some
standard APIs for getting/naming a temporary file or directory which
should pay attention to any system settings - mktemp() is a generally
available one for C code IIRC.

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