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From: Karl Mehltretter <kmehltretter@gmail.com>
To: SJ Park <sj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	 Lian Wang <lianux.mm@gmail.com>,
	Kunwu Chan <kunwu.chan@gmail.com>,
	damon@lists.linux.dev,  linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] mm/damon/core: score an unmeasured PSI goal as not achieved for the temporal tuner
Date: Mon, 21 Sep 2026 20:51:24 +0200	[thread overview]
Message-ID: <arF7t_kmisrx0_WF@gmail.com> (raw)
In-Reply-To: <20260919155342.85699-1-sj@kernel.org>

On Sat, Sep 19, 2026 at 08:53:41AM +0100, SJ Park wrote:
> And the apply interval (or, next_apply_sis) is extended for each commit, in
> damon_set_attrs().  Hence, the problem can still happen.
> 

Thank you for explaining the apply interval. So the PSI measurement
period can exceed the quota reset interval.

> > full commit zeroes esz, esz_bp and the charge state of the running
> > schemes. Please correct me if I read this wrong. I can send a
> > separate patch for that.
> 
> I don't really understand the problem.  Could you please further elaborate?
> 

I posted this as a separate patch series with KUnit tests:

https://lore.kernel.org/r/20260921003047.12041-1-kmehltretter@gmail.com/

Thanks,
Karl

  reply	other threads:[~2026-09-21 18:51 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-15  6:09 [PATCH 0/2] mm/damon: fix zero quota for PSI goals under " Karl Mehltretter
2026-09-15  6:09 ` [PATCH 1/2] mm/damon/core: score an unmeasured PSI goal as not achieved for " Karl Mehltretter
2026-09-15 14:50   ` SJ Park
2026-09-15 21:19     ` Karl Mehltretter
2026-09-16  0:13       ` SJ Park
2026-09-19  5:44         ` Karl Mehltretter
2026-09-19 15:53           ` SJ Park
2026-09-21 18:51             ` Karl Mehltretter [this message]
2026-09-15  6:09 ` [PATCH 2/2] mm/damon/tests/core-kunit: test PSI goal rounds under " Karl Mehltretter
2026-09-15  7:04   ` KunWu Chan
2026-09-15 21:31     ` Karl Mehltretter
2026-09-16  0:21   ` SJ Park
2026-09-19  5:47     ` Karl Mehltretter
2026-09-19 15:55       ` SJ Park

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