Re: [RFC PATCH, x86]: Disable CPA cache flush for selfsnoop targets

Thomas Gleixner
2019-07-15T19:46:39Z

On Mon, 15 Jul 2019, Andi Kleen wrote:

> > Right, we don't know where the PAT invocation comes from and whether they
> > are safe to omit flushing the cache. The module load code would be one
> > obvious candidate.
>
> Module load just changes the writable/executable status, right? That shouldn't
> need to flush in any case because it doesn't change the caching attributes.

Ah right. We don't flush when the caching attributes are not changed.

Thanks,

tglx