Re: Linux 6.11-rc1

[Thomas Gleixner]

On Wed, Jul 31 2024 at 14:20, Peter Zijlstra wrote:
> On Tue, Jul 30, 2024 at 01:24:34PM -0700, Guenter Roeck wrote:
>> An interesting bit of information: The problem is seen with many,
>> but not all CPUs. For example, I don't see it with athlon, n270, Dhyana,
>> or EPYC. qemu32 is affected, but qemu64 is fine. But on the other side
>> both kvm32 and kvm64 are affected.
>
> pti=off makes it go away, could be those CPU models don't have meltdown
> and as such don't enable PTI.

The AMD ones don't have meltdown and neither does n270 which is an
in-order atom.

Thanks,

        tglx