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Date:   Wed, 19 May 2021 15:06:18 +0200
From:   Michal Hocko <mhocko@suse.com>
To:     chenguanyou <chenguanyou9338@gmail.com>
Cc:     linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
        keescook@chromium.org, lukas.bulwahn@gmail.com, vbabka@suse.cz,
        gpiccoli@canonical.com, chenguanyou <chenguanyou@xiaomi.com>
Subject: Re: [PATCH] hungtask: add filter kthread/check comm
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References: <20210519121325.22083-1-chenguanyou@xiaomi.com>
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On Wed 19-05-21 20:13:25, chenguanyou wrote:
> Some kernel threads are always in D state, when we enable hung_task,
> it will misjudge, we should skip these to narrow the scope.

Why they are in the D state in the first place?

Also you are proposing a new user interface which would need to be
maintained for ever. This means that any such a proposal has to be very
carefully justified. Always make sure to cc linux-api mailing list in
these cases.

From the (not much) information you have provided this interface seems
more like a workaround for buggy code so far.
-- 
Michal Hocko
SUSE Labs