linux-kernel - Re: [PATCH v4 23/35] vdso/datastore: Map pages through struct page

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Message-ID: <aQjemPIbHMplGD4N@finisterre.sirena.org.uk>
Date: Mon, 3 Nov 2025 16:55:52 +0000
From: Mark Brown <broonie@...nel.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
	Andy Lutomirski <luto@...nel.org>,
	Vincenzo Frascino <vincenzo.frascino@....com>,
	Arnd Bergmann <arnd@...db.de>,
	"David S. Miller" <davem@...emloft.net>,
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	Nick Alcock <nick.alcock@...cle.com>,
	John Stultz <jstultz@...gle.com>, Stephen Boyd <sboyd@...nel.org>,
	John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
	Shuah Khan <shuah@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Theodore Ts'o <tytso@....edu>,
	"Jason A. Donenfeld" <Jason@...c4.com>,
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	Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
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	sparclinux@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
	loongarch@...ts.linux.dev, linux-mips@...r.kernel.org,
	linux-s390@...r.kernel.org, Aishwarya.TCV@....com
Subject: Re: [PATCH v4 23/35] vdso/datastore: Map pages through struct page

On Mon, Nov 03, 2025 at 04:54:01PM +0100, Thomas Gleixner wrote:
> On Mon, Nov 03 2025 at 15:24, Mark Brown wrote:

> > which isn't super instructive.  Not all platforms seem to be affected,
> > I've seen this on at least the Arm FVP, Orion O6 and Libretech Renegade
> > Elite.  The diagnostics aren't very clear here but given that I'm seeing
> > the same issue and bisect result on multiple platforms it seemed worth
> > mentioning.  Some platforms do seem fine.

> Can you try

>     git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/vdso

> which is rc1 based and only contains the VDSO changes. That might give
> us a better hint.

Yeah, hopefully - my infrastructure is pretty swamped ATM and I'm in an
internal conference.  I did kick something off earlier on this specific
commit which should be equivalent information but it'll be tomorrow
before I can get a full picture.

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