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From:   Vineeth Remanan Pillai <vpillai@digitalocean.com>
Date:   Thu, 16 Apr 2020 15:59:11 -0400
Message-ID: <CANaguZC+yKkPNcb65hOWjbhmpdP3zp8SdXf0xuvDeV9kEeqnsw@mail.gmail.com>
Subject: Re: [RFC PATCH 07/13] sched: Add core wide task selection and scheduling.
To:     Chen Yu <yu.chen.surf@gmail.com>
Cc:     Nishanth Aravamudan <naravamudan@digitalocean.com>,
        Julien Desfossez <jdesfossez@digitalocean.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        Ingo Molnar <mingo@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Paul Turner <pjt@google.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        =?UTF-8?B?RnLDqWTDqXJpYyBXZWlzYmVja2Vy?= <fweisbec@gmail.com>,
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        Greg Kerr <kerrnel@google.com>, Phil Auld <pauld@redhat.com>,
        Aaron Lu <aaron.lwe@gmail.com>,
        Aubrey Li <aubrey.intel@gmail.com>,
        "Li, Aubrey" <aubrey.li@linux.intel.com>,
        Valentin Schneider <valentin.schneider@arm.com>,
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        Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Joel Fernandes <joelaf@google.com>,
        Joel Fernandes <joel@joelfernandes.org>,
        Aaron Lu <aaron.lu@linux.alibaba.com>,
        Long Cui <long.cui@intel.com>
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> Hi Vineeth,
> An NULL pointer exception was found when testing V5 on top of stable
> v5.6.2. And we tried the patch Peter suggested, the NULL pointer
> was not found so far. We don't know if this change would help mitigate
> the symptom, but it should do no harm to test with this fix applied.
>

Thanks for the patch Chenyu!

I was also looking into this as part of addressing Peter's comments. I
shall include this patch in v6 along with addressing all the issues
that Peter pointed out in this thread.

Thanks,
Vineeth