Messages in this thread | | | Date | Mon, 20 Feb 2023 23:22:00 +0100 | Subject | Re: [PATCH v9 0/8] Parallel CPU bringup for x86_64 | From | Piotr Gorski <> |
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Hello.
In my case, admittedly, the error does not occur, while I have information from a friend that AMD FX 6300 only shows 1 core when using smp boot patchset, so mentioned Oleksandr. Probably soon friend will join the discussion and will be able to provide more information.
W dniu 20.02.2023 o 22:23, Oleksandr Natalenko pisze: > 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. >
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