linux-kernel - Re: [PATCH 1/2] mm/damon/sysfs: Implement recording feature

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Date: Tue, 6 Feb 2024 11:26:59 +0800
From: cuiyangpei <cuiyangpei@...il.com>
To: SeongJae Park <sj@...nel.org>
Cc: akpm@...ux-foundation.org, damon@...ts.linux.dev, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, xiongping1@...omi.com
Subject: Re: [PATCH 1/2] mm/damon/sysfs: Implement recording feature

On Mon, Feb 05, 2024 at 06:56:59PM -0800, SeongJae Park wrote:
> Hi Cuiyangpei,
> 
> On Mon, 29 Jan 2024 20:13:16 +0800 cuiyangpei <cuiyangpei@...il.com> wrote:
> 
> > On Sun, Jan 28, 2024 at 08:28:04AM -0800, SeongJae Park wrote:
> > > On Sun, 28 Jan 2024 17:13:00 +0800 cuiyangpei <cuiyangpei@...il.com> wrote:
> > > 
> > > > On Fri, Jan 26, 2024 at 12:04:54AM -0800, SeongJae Park wrote:
> > > [...]
> > > > > So, 'update_schemes_tried_regions' command is firstly handled by
> > > > > 'damon_sysfs_cmd_request_callback()', which is registered as
> > > > > after_wmarks_check() and after_aggregation() callback.  Hence
> > > > > 'update_schemes_tried_regions' command is still effectively working in
> > > > > aggregation interval granularity.  I think this is what you found, right?
> > > > > 
> > > > Yes.
> > > > > If I'm not wrongly understanding your point, I think the concern is valid.  I
> > > > > think we should make it works in sampling interval granularity.  I will try to
> > > > > make so.  Would that work for your use case?
> > > > > 
> > > > It's much better than working in aggregation interval.
> > > 
> > > Thank you for confirming.  I will start working on this.
> > > 
> > 
> > Great, looking forward to seeing the progress.
> 
> Just sent a patch[1] for this.
> 
> I also updated DAMON user-space tool, damo, to use this improvement[2].  I hope
> that to help others who using DAMON with their own tool to easily understand
> how they can get the improvement from this patch.
> 
> Also, please feel free to ask any questions and/or help.
> 
> [1] https://lore.kernel.org/r/20240206025158.203097-1-sj@kernel.org
> [2] https://github.com/awslabs/damo/commit/75af3a1c0b3e79cd3207f0f8df5b5ac39f887450
> 
> 
> Thanks,
> SJ
> 
> [...]

Hi SeongJae,

Thank you for sending the patch. I will verify this feature on the phone and reach out
if I have any questions or require assistance.

Thanks.