From: sashiko-bot@kernel.org
To: "SJ Park" <sj@kernel.org>
Cc: damon@lists.linux.dev
Subject: Re: [PATCH 6.1.y] mm/damon/core: don't skip damos_adjust_quota() while esz is not zero
Date: Sat, 03 Oct 2026 17:56:15 +0000 [thread overview]
Message-ID: <20261003175616.156391F0089C@smtp.kernel.org> (raw)
In-Reply-To: <20261003155119.28683-1-sj@kernel.org>
> DAMOS could unexpectedly stop working when a user disables quota using the
> online parameters commit feature. Fix it by correcting a wrong quota
> unset check in damos_adjust_quota().
>
> DAMON users could disable all quotas by unsetting time and size quotas,
> and removing all quota goals. The intention of disabling quotas would be
> making DAMOS run at full speed. When such quota disabled setup is
> detected, damos_adjust_quota() skips all its work. The skipped works
> include effective size quota (damos_quota->esz) updates and charged quota
> amount (damos_quota->charged_sz) resets. The intention is to avoid doing
> unnecessary work when quotas are disabled.
>
> However, users could do the setup while effective size quota is non-zero,
> by doing the disabling with the online DAMON parameters commit feature.
> In this case, because the effective size quota exists, DAMOS will keep
> [ ... ]
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> Reviewed-by: Kunwu Chan <kunwu.chan@gmail.com>
> Cc: <stable@vger.kernel.org> # 5.19.x
> (cherry picked from commit 52ae167ce16609c7e6fffef588b3c2c26de2db19)
> Signed-off-by: SJ Park <sj@kernel.org>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261003155119.28683-1-sj@kernel.org?part=1
next prev parent reply other threads:[~2026-10-03 17:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2026100319-silent-lark-6245@gregkh>
2026-10-03 15:51 ` [PATCH 6.1.y] mm/damon/core: don't skip damos_adjust_quota() while esz is not zero SJ Park
2026-10-03 17:56 ` sashiko-bot [this message]
2026-10-04 16:29 ` Sasha Levin
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