linux-kernel - Re: [RFC PATCH] mm/damon/core: avoid overflow in damon_feed_loop_next

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Message-ID: <4dd8ba2c-e994-417d-baa9-47e40b50c1b4@roeck-us.net>
Date: Wed, 30 Oct 2024 21:18:51 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: SeongJae Park <sj@...nel.org>
Cc: damon@...ts.linux.dev, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] mm/damon/core: avoid overflow in
 damon_feed_loop_next_input()

On Thu, Sep 05, 2024 at 10:24:05AM -0700, SeongJae Park wrote:
> damon_feed_loop_next_input() is fragile to overflows.  Rewrite code to
> avoid overflows.  This is not yet well tested on 32bit archs.
> 
> Reported-by: Guenter Roeck <linux@...ck-us.net>
> Closes: https://lore.kernel.org/944f3d5b-9177-48e7-8ec9-7f1331a3fea3@roeck-us.net
> Fixes: 9294a037c015 ("mm/damon/core: implement goal-oriented feedback-driven quota auto-tuning")
> Signed-off-by: SeongJae Park <sj@...nel.org>
> ---
> As mentioned on the commit message, this is not yet sufficiently tested
> on 32bit machines.  That's why this is RFC.

Is that patch going anywhere ? I have been testing it on a lot of 32-bit architectures,
and I do not see any failures.

Guenter