linux-kernel - Re: Linux 6.2-rc1

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Date:   Mon, 26 Dec 2022 14:08:48 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Max Filippov <jcmvbkbc@...il.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Peter Zijlstra <peterz@...radead.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Kees Cook <keescook@...omium.org>
Subject: Re: Linux 6.2-rc1

On Mon, Dec 26, 2022 at 01:10:40PM -0800, Max Filippov wrote:
> On Mon, Dec 26, 2022 at 12:44 PM Guenter Roeck <linux@...ck-us.net> wrote:
> > xtensa:allmodconfig
> >
> > Building xtensa:allmodconfig ... failed
> > --------------
> > Error log:
> > kernel/kcsan/kcsan_test.c: In function '__report_matches':
> > kernel/kcsan/kcsan_test.c:257:1: error: the frame size of 1680 bytes is larger than 1536 bytes
> >
> > Bisect for both points to commit e240e53ae0abb08 ("mm, slub: add
> > CONFIG_SLUB_TINY").  Reverting it on its own is not possible, but
> > reverting the following two patches fixes the problem.
> >
> > 149b6fa228ed mm, slob: rename CONFIG_SLOB to CONFIG_SLOB_DEPRECATED
> > e240e53ae0ab mm, slub: add CONFIG_SLUB_TINY
> >
> > Context: CONFIG_SLUB_TINY is enabled with allmodconfig builds.
> > This enables some previously disabled configurations and disables
> > some previously enabled configurations. Not sure if that is a good
> > thing or a bad thing, but it does result in the above errors.
> 
> For xtensa I've posted the following fix:
> https://lore.kernel.org/lkml/20221223074238.4092772-1-jcmvbkbc@gmail.com/
> I suspect that previously KCSAN was disabled in allmodconfig builds for xtensa.
> 

Correect.

Thanks,
Guenter