linux-kernel - Re: [PATCH 10/13] arch, mm: set high_memory in free_area

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Message-ID: <5e40219b-f149-4e0f-aa10-c09fa183945e@sirena.org.uk>
Date: Tue, 11 Mar 2025 21:33:29 +0000
From: Mark Brown <broonie@...nel.org>
To: Mike Rapoport <rppt@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Andreas Larsson <andreas@...sler.com>,
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Subject: Re: [PATCH 10/13] arch, mm: set high_memory in free_area_init()

On Tue, Mar 11, 2025 at 11:06:56PM +0200, Mike Rapoport wrote:
> On Tue, Mar 11, 2025 at 05:51:06PM +0000, Mark Brown wrote:

> > This patch appears to be causing breakage on a number of 32 bit arm
> > platforms, including qemu's virt-2.11,gic-version=3.  Affected platforms
> > die on boot with no output, a bisect with qemu points at this commit and
> > those for physical platforms appear to be converging on the same place.

> Can you share how this can be reproduced with qemu?

https://lava.sirena.org.uk/scheduler/job/1184953

Turns out it's actually producing output on qemu:

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 6.14.0-rc6-next-20250311 (tuxmake@...make) (arm-linux-gnueabihf-gcc (Debian 13.3.0-5) 13.3.0, GNU ld (GNU Binutils for Debian) 2.43.1) #1 SMP @1741691801
[    0.000000] CPU: ARMv7 Processor [414fc0f0] revision 0 (ARMv7), cr=10c5387d
[    0.000000] CPU: div instructions available: patching division code
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
[    0.000000] OF: fdt: Machine model: linux,dummy-virt
[    0.000000] random: crng init done
[    0.000000] earlycon: pl11 at MMIO 0x09000000 (options '')
[    0.000000] printk: legacy bootconsole [pl11] enabled
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] efi: UEFI not found.
[    0.000000] cma: Reserved 64 MiB at 0x00000000

- I'd only been sampling the logs for the physical platforms, none of
which had shown anything.

(you dropped me from the CCs BTW!)

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