linux-kernel - Re: [PATCH v2 0/3] topology/sysfs: only export used sysfs attributes

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Message-ID: <63384337-ba36-9b2a-c9ae-75e3f5ac02d7@inria.fr>
Date:   Sat, 4 Dec 2021 10:48:10 +0100
From:   Brice Goglin <Brice.Goglin@...ia.fr>
To:     "Song Bao Hua (Barry Song)" <song.bao.hua@...ilicon.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Heiko Carstens <hca@...ux.ibm.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jonathan Cameron <jonathan.cameron@...wei.com>,
        Len Brown <len.brown@...el.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCH v2 0/3] topology/sysfs: only export used sysfs attributes

Le 04/12/2021 à 10:07, Song Bao Hua (Barry Song) a écrit :
>
> Could you give me one minute?
>
> +Brice
>
> I'd like to hear some feedbacks from hwloc if there
> is a chance to break userspace and if userspace depends
> on the existence of sysfs even though the topology
> doesn't exist.
>
> If no, I feel it is safe to take.
>

Hello

If the question is whether hwloc *requires* cluster/die/book/drawer 
sysfs files to exist, then the answer is no. We have to support old 
kernels without those files anyway.

Brice





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