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

[Thomas Gleixner <tglx@linutronix.de>]

On Mon, Nov 03 2025 at 15:24, Mark Brown wrote:
> On Tue, Oct 14, 2025 at 08:49:09AM +0200, Thomas Weißschuh wrote:
>
>> An upcoming change will allocate the datapages dynamically instead of as
>> part of the kernel image. Such pages can only be mapped through
>> 'struct page' and not through PFNs.
>
> I'm seeing some boot failures on some arm64 platforms in -next which are
> bisecting to this patch in -next.  Unfortunately the diagnostics aren't
> super useful, we seem to just stop making progress in userspace with no
> obvious output.  One sample log from the FVP is:
>
>    https://lava.sirena.org.uk/scheduler/job/2036229#L1268
>
> 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.

Thanks,

        tglx