Hello.
On 20.02.2023 21:31, David Woodhouse wrote:
On Mon, 2023-02-20 at 17:40 +0100, Oleksandr Natalenko wrote:
On pondělí 20. února 2023 17:20:13 CET David Woodhouse wrote:
> On Mon, 2023-02-20 at 17:08 +0100, Oleksandr Natalenko wrote:
> >
> > I've applied this to the v6.2 kernel, and suspend/resume broke on
> > my
> > Ryzen 5950X desktop. The machine suspends just fine, but on
> > resume
> > the screen stays blank, and there's no visible disk I/O.
> >
> > Reverting the series brings suspend/resume back to working state.
>
> Hm, thanks. What if you add 'no_parallel_bringup' on the command
> line?
If the `no_parallel_bringup` param is added, the suspend/resume
works.
Thanks for the testing. Can I ask you to do one further test: apply the
series only as far as patch 6/8 'x86/smpboot: Support parallel startup
of secondary CPUs'.
That will do the new startup asm sequence where each CPU finds its own
per-cpu data so it *could* work in parallel, but doesn't actually do
the bringup in parallel yet.
With patches 1 to 6 (including) applied and no extra cmdline params
added the resume doesn't work.
Does your box have a proper serial port?
No, sorry. I know it'd help with getting logs, and I do have a
serial-to-USB cable that I use for another machine, but in this one the
port is not routed to outside. I think I can put a header there as the
motherboard does have pins, but I'd have to buy one first. In theory, I
can do that, but that won't happen within the next few weeks.
P.S. Piotr Gorski (in Cc) also reported this: "My friend from CachyOS
can confirm bugs with smpboot patches. AMD FX 6300 only shows 1 core
when using smp boot patchset". Probably, he can reply to this thread and
provide more details.
--
Oleksandr Natalenko (post-factum)
