Re: [RFC PATCH 2/2] mm/damon/reclaim: avoid divide-by-zero in damon_reclaim_apply_parameters()

[SeongJae Park]

On Tue, 26 Aug 2025 11:36:53 +0800 Quanmin Yan <yanquanmin1@xxxxxxxxxx> wrote:

> When creating a new scheme of DAMON_RECLAIM, the calculation
> of 'min_age_region' uses 'aggr_interval' as the divisor, which
> may lead to division-by-zero errors. Fix it by directly returning
> -EINVAL when such a case occurs.

Nice catch, thank you for this patch!

> 
> Fixes: f5a79d7c0c87 ("mm/damon: introduce struct damos_access_pattern")

Let's add Cc: stable@

> Signed-off-by: Quanmin Yan <yanquanmin1@xxxxxxxxxx>

Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>


Thanks,
SJ

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