linux-kernel - Re: Removing Mandatory Locks

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Message-ID: <20210820131122.GA24659@1wt.eu>
Date:   Fri, 20 Aug 2021 15:11:22 +0200
From:   Willy Tarreau <w@....eu>
To:     Jeff Layton <jlayton@...nel.org>
Cc:     Amir Goldstein <amir73il@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Matthew Wilcox <willy@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        David Laight <David.Laight@...lab.com>,
        David Hildenbrand <david@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
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        Chengguang Xu <cgxu519@...ernel.net>,
        Christian König 
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        Linux-MM <linux-mm@...ck.org>,
        Florian Weimer <fweimer@...hat.com>,
        Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: Removing Mandatory Locks

On Fri, Aug 20, 2021 at 09:03:16AM -0400, Jeff Layton wrote:
> Good point. It wouldn't hurt to push such a warning into stable kernels
> at the same time. There always is a lag when we do something like this
> before some downstream user notices.

Yes, that's why I proposed this. A warning can be backported into
stable without big consequences except warning future victims...

Willy