linux-kernel - Re: [PATCH] sched/topology: Fix overlapping sched

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Message-ID: <jhjmu85sm8b.mognet@arm.com>
Date:   Tue, 24 Mar 2020 17:20:52 +0000
From:   Valentin Schneider <valentin.schneider@....com>
To:     linux-kernel@...r.kernel.org
Cc:     peterz@...radead.org, mingo@...nel.org, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, morten.rasmussen@....com,
        mgorman@...hsingularity.net
Subject: Re: [PATCH] sched/topology: Fix overlapping sched_group build


On Tue, Mar 24 2020, Valentin Schneider wrote:
> Fix
> ===
>
> Sanitize the groups we get out of build_group_from_child_sched_domain()
> with the span of the domain we're currently building - this ensures the
> groups we build only contain CPUs that are the right distance away from the
> base CPU. This also requires modifying build_balance_mask().
>

I somehow missed that this triggers the WARN_ON_ONCE() in
init_overlap_sched_group(). Gotta figure out why.