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SubjectRe: [PATCH v3 0/9] Parallel CPU bringup for x86_64
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.



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