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From: SeongJae Park <sj@kernel.org>
To: Ravi Jonnalagadda <ravis.opensrc@gmail.com>
Cc: SeongJae Park <sj@kernel.org>,
	damon@lists.linux.dev, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
	akpm@linux-foundation.org, corbet@lwn.net, bijan311@gmail.com,
	ajayjoshi@micron.com, honggyu.kim@sk.com, yunjeong.mun@sk.com
Subject: Re: [RFC PATCH 5/5] mm/damon/paddr: add time budget to migration page walk
Date: Sun, 17 May 2026 16:43:24 -0700	[thread overview]
Message-ID: <20260517234326.89365-1-sj@kernel.org> (raw)
In-Reply-To: <20260516210357.2247-6-ravis.opensrc@gmail.com>

On Sat, 16 May 2026 14:03:57 -0700 Ravi Jonnalagadda <ravis.opensrc@gmail.com> wrote:

> On populated physical address ranges the pageblock skip optimization
> alone is insufficient — most pageblocks contain at least one allocated
> page, so the walk still iterates millions of PFNs.

So my questions to the fourth patch of this series are also applied here,
especially about the assumption of systems having most memory free.  I will
hold digging deep here until the high level discussion is completed.


Thanks,
SJ

[...]


  reply	other threads:[~2026-05-17 23:43 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-16 21:03 [RFC PATCH 0/5] mm/damon: DAMOS quota controller and paddr migration walk fixes Ravi Jonnalagadda
2026-05-16 21:03 ` [RFC PATCH 1/5] mm/damon/core: fix nr_accesses_bp underflow in damon_moving_sum Ravi Jonnalagadda
2026-05-17 18:16   ` SeongJae Park
2026-05-16 21:03 ` [RFC PATCH 2/5] mm/damon/core: cap effective quota size to total monitored memory Ravi Jonnalagadda
2026-05-17 18:36   ` SeongJae Park
2026-05-18  5:22     ` Ravi Jonnalagadda
2026-05-19  0:38       ` SeongJae Park
2026-05-16 21:03 ` [RFC PATCH 3/5] mm/damon/core: floor effective quota size at minimum region size Ravi Jonnalagadda
2026-05-17 18:47   ` SeongJae Park
2026-05-16 21:03 ` [RFC PATCH 4/5] mm/damon/paddr: skip free pageblocks in migration walk Ravi Jonnalagadda
2026-05-17 23:37   ` SeongJae Park
2026-05-18  5:38     ` Ravi Jonnalagadda
2026-05-19  1:14       ` SeongJae Park
2026-05-16 21:03 ` [RFC PATCH 5/5] mm/damon/paddr: add time budget to migration page walk Ravi Jonnalagadda
2026-05-17 23:43   ` SeongJae Park [this message]
2026-05-18  5:54     ` Ravi Jonnalagadda
2026-05-19  1:27       ` SeongJae Park

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