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From: Aveline Noir <jm5905938@gmail.com>
To: SJ Park <sj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	damon@lists.linux.dev, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: Re: [BUG] DAMON_STAT: idle percentiles out of order on 32-bit
Date: Thu, 15 Oct 2026 22:45:01 +0800	[thread overview]
Message-ID: <179207550140.2.6042983090152523193@gmail.com> (raw)
In-Reply-To: <20261015141319.88393-1-sj@kernel.org>

Hi SJ,

I haven't seen this affect a real workload. I found it while testing
DAMON_STAT on 32-bit.

The upper percentiles can stay at zero or keep old values. If someone
uses them to judge how much memory is cold or to choose a reclaim
threshold, they could get the wrong picture.

I'll send the fix and test results in a separate mail.

Thanks,
Aveline Noir

      reply	other threads:[~2026-10-15 14:46 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-15 11:24 [BUG] DAMON_STAT: idle percentiles out of order on 32-bit Aveline Noir
2026-10-15 14:13 ` SJ Park
2026-10-15 14:45   ` Aveline Noir [this message]

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