Messages in this thread |  | | Subject | Re: [PATCH v3 0/9] Parallel CPU bringup for x86_64 | From | Tom Lendacky <> | Date | Mon, 20 Dec 2021 15:47:21 -0600 |
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On 12/20/21 3:29 PM, David Woodhouse wrote: > On Mon, 2021-12-20 at 12:54 -0600, Tom Lendacky wrote: >> Took the tree back to commit df9726cb7178 and then applied this change. >> I'm unable to trigger any kind of failure with this change. > > Hm... I fired up an EC2 m6a.48xlarge instance (192 CPUs) to play with. > > I can reproduce your triple-fault on SMP bringup, but only with kexec. > And I basically can't get *anything* to kexec without that triple- > fault. Not a clean 5.16-rc2, not the Fedora stock 5.14.10 kernel. > > If I *boot* instead of kexec, I have not yet seen the problem at all. > This is using Legacy BIOS not UEFI.
Let me try with a legacy BIOS and see if I can repro. Might not be until tomorrow, though, since I had to let someone borrow the machine.
Thanks, Tom
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