linux-kernel - Re: [PATCH] powerpc/32s: Setup the early hash table at all time.

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Message-ID: <87wnz1lbce.fsf@depni.sinp.msu.ru>
Date:   Wed, 04 Nov 2020 12:28:49 +0300
From:   Serge Belyshev <belyshev@...ni.sinp.msu.ru>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     Andreas Schwab <schwab@...ux-m68k.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/32s: Setup the early hash table at all time.

>> To be sure we are not in front of a long lasting bug, could you try
>> CONFIG_KASAN=y on v5.9 ?
>
> Indeed it started to fail somewhere between v5.6 and v5.7.
>
> v5.7 fails early with few messages on the console with reboot, v5.8 and
> later hang right at bootloader.
>
> I'm bisecting now.

(side note: I tried FB_OF=y instead of DRM_RADEON + DRM_FBDEV_* to speed
up bisection and it turns out in that configuration KASAN never worked,
down to commit 305d600123046, hanging right after bootloader or even
with invalid access in the bootloader itself).