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From: SeongJae Park <sj@kernel.org>
To: Gautam Menghani <gautammenghani201@gmail.com>
Cc: damon@lists.linux.dev
Subject: Re: Question about hugetlbfs tests
Date: Tue, 16 Aug 2022 20:50:30 +0000
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Hi Gautam,

On Tue, 16 Aug 2022 22:23:55 +0530 Gautam Menghani <gautammenghani201@gmail.com> wrote:

> Hi,
> 
> I have been looking to understand the TODO mentioned in the damon-tests repo
> on github here: https://github.com/awslabs/damon-tests/tree/master/corr
> 
> The TODO in corr/TODO says "Test hugetlbfs". I want to understand what is
> required in this.

Thank you very much for showing your interest in the TODO item!

> Do we need a test that writes data to hugepages and reads it back to check if
> read/write is successful?
> Or do we need a hugepage scheme that is applied on masim, which we then check
> to ensure hugepages were used?

I'd prefer this option.  That is, making 'masim' to support use of hugetlbfs
and checking if DAMON still monitors the access pattern well, maybe by
extending masim-record test[1].

> Or is something else required?
> Please advise on this.

No problem, hope the above answer be some help.  If there is anything unclear
or I'm wrong, please let me know.

And, now I remember that you already sent me this question via github[2], and I
was totally missing that.  Please forgive my dullness.  I was in vacation at
that time, so I wanted to answer as soon as return from vacation, but I was
forgetting till now.  Sorry again.

[1] https://github.com/awslabs/damon-tests/blob/master/corr/tests/masim-record.sh
[2] https://github.com/awslabs/damon-tests/issues/1


Thanks,
SJ

> 
> Thanks,
> Gautam