On Mon, 2023-02-20 at 17:40 +0100, Oleksandr Natalenko wrote: > Hello. > > Thank you for your reply. > > 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. Does your box have a proper serial port?
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