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From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Guillaume Tucker <guillaume.tucker@collabora.com>
Cc: "kernelci-results@groups.io" <kernelci-results@groups.io>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Nicolas Pitre <nico@fluxnic.net>,
	Linus Walleij <linus.walleij@linaro.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	clang-built-linux <clang-built-linux@googlegroups.com>,
	Ard Biesheuvel <ardb@kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: next/master bisection: baseline.login on rk3288-rock2-square
Date: Thu, 4 Feb 2021 11:44:20 +0000	[thread overview]
Message-ID: <20210204114420.GW1463@shell.armlinux.org.uk> (raw)
In-Reply-To: <46373679-a149-8a3d-e914-780e4c6ff8be@collabora.com>

On Thu, Feb 04, 2021 at 11:32:05AM +0000, Guillaume Tucker wrote:
> Yes it does fix the issue:
> 
>   https://lava.collabora.co.uk/scheduler/job/3173819
> 
> with Ard's fix applied to this test branch:
> 
>   https://gitlab.collabora.com/gtucker/linux/-/commits/next-20210203-ard-fix/
> 
> 
> +clang +Nick
> 
> It's worth mentioning that the issue only happens with kernels
> built with Clang.  As you can see there are several other arm
> platforms failing with clang-11 builds but booting fine with
> gcc-8:

My gut feeling is that it isn't Clang specific - it's likely down to
the exact code/data placement, how things end up during decompression,
and exactly what state the cache ends up in.

That certainly was the case with the original regression.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Guillaume Tucker <guillaume.tucker@collabora.com>
Cc: Ard Biesheuvel <ardb@kernel.org>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Nicolas Pitre <nico@fluxnic.net>,
	"kernelci-results@groups.io" <kernelci-results@groups.io>,
	clang-built-linux <clang-built-linux@googlegroups.com>,
	Nick Desaulniers <ndesaulniers@google.com>
Subject: Re: next/master bisection: baseline.login on rk3288-rock2-square
Date: Thu, 4 Feb 2021 11:44:20 +0000	[thread overview]
Message-ID: <20210204114420.GW1463@shell.armlinux.org.uk> (raw)
In-Reply-To: <46373679-a149-8a3d-e914-780e4c6ff8be@collabora.com>

On Thu, Feb 04, 2021 at 11:32:05AM +0000, Guillaume Tucker wrote:
> Yes it does fix the issue:
> 
>   https://lava.collabora.co.uk/scheduler/job/3173819
> 
> with Ard's fix applied to this test branch:
> 
>   https://gitlab.collabora.com/gtucker/linux/-/commits/next-20210203-ard-fix/
> 
> 
> +clang +Nick
> 
> It's worth mentioning that the issue only happens with kernels
> built with Clang.  As you can see there are several other arm
> platforms failing with clang-11 builds but booting fine with
> gcc-8:

My gut feeling is that it isn't Clang specific - it's likely down to
the exact code/data placement, how things end up during decompression,
and exactly what state the cache ends up in.

That certainly was the case with the original regression.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

  reply	other threads:[~2021-02-04 11:46 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <601b773a.1c69fb81.9f381.a32a@mx.google.com>
2021-02-04  8:43 ` next/master bisection: baseline.login on rk3288-rock2-square Guillaume Tucker
2021-02-04  8:43   ` Guillaume Tucker
2021-02-04  9:07   ` Ard Biesheuvel
2021-02-04  9:07     ` Ard Biesheuvel
2021-02-04 10:06     ` Russell King - ARM Linux admin
2021-02-04 10:06       ` Russell King - ARM Linux admin
2021-02-04 10:27       ` Ard Biesheuvel
2021-02-04 10:27         ` Ard Biesheuvel
2021-02-04 10:33         ` Guillaume Tucker
2021-02-04 10:33           ` Guillaume Tucker
2021-02-04 11:32           ` Guillaume Tucker
2021-02-04 11:32             ` Guillaume Tucker
2021-02-04 11:44             ` Russell King - ARM Linux admin [this message]
2021-02-04 11:44               ` Russell King - ARM Linux admin
2021-02-04 12:09               ` Ard Biesheuvel
2021-02-04 12:09                 ` Ard Biesheuvel
2021-02-04 15:42             ` Ard Biesheuvel
2021-02-04 15:42               ` Ard Biesheuvel
2021-02-04 15:53               ` Guillaume Tucker
2021-02-04 15:53                 ` Guillaume Tucker
2021-02-04 16:01                 ` Ard Biesheuvel
2021-02-04 16:01                   ` Ard Biesheuvel
2021-02-04 18:06                   ` Nick Desaulniers
2021-02-04 18:06                     ` Nick Desaulniers
2021-02-04 18:12                     ` Nathan Chancellor
2021-02-04 18:12                       ` Nathan Chancellor
2021-02-04 18:23                       ` Nick Desaulniers
2021-02-04 18:23                         ` Nick Desaulniers
2021-02-04 21:31                         ` Guillaume Tucker
2021-02-04 21:31                           ` Guillaume Tucker
2021-02-04 21:50                           ` Russell King - ARM Linux admin
2021-02-04 21:50                             ` Russell King - ARM Linux admin
2021-02-05  8:21                           ` Ard Biesheuvel
2021-02-05  8:21                             ` Ard Biesheuvel
2021-02-05 12:05                             ` Ard Biesheuvel
2021-02-05 12:05                               ` Ard Biesheuvel
2021-02-06 13:10                               ` Guillaume Tucker
2021-02-06 13:10                                 ` Guillaume Tucker
2021-02-06 13:12                                 ` Ard Biesheuvel
2021-02-06 13:12                                   ` Ard Biesheuvel
2021-02-04 21:09                   ` Guillaume Tucker
2021-02-04 21:09                     ` Guillaume Tucker
2021-02-04 10:47         ` Russell King - ARM Linux admin
2021-02-04 10:47           ` Russell King - ARM Linux admin
2021-02-04 10:55           ` Ard Biesheuvel
2021-02-04 10:55             ` Ard Biesheuvel
2021-02-04 12:26             ` Marc Zyngier
2021-02-04 12:26               ` Marc Zyngier
2021-02-04 14:09               ` Russell King - ARM Linux admin
2021-02-04 14:09                 ` Russell King - ARM Linux admin
2021-02-04 14:25                 ` Ard Biesheuvel
2021-02-04 14:25                   ` Ard Biesheuvel
2021-02-04 14:36                   ` Russell King - ARM Linux admin
2021-02-04 14:36                     ` Russell King - ARM Linux admin
2021-02-04 15:52                     ` Ard Biesheuvel
2021-02-04 15:52                       ` Ard Biesheuvel

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