Re: [PATCH RESEND 00/30] My patch queue

[Maxim Levitsky <mlevitsk@redhat.com>]

On Tue, 2022-02-08 at 13:02 +0100, Paolo Bonzini wrote:
> On 2/7/22 16:54, Maxim Levitsky wrote:
> > This is set of various patches that are stuck in my patch queue.
> > 
> > KVM_REQ_GET_NESTED_STATE_PAGES patch is mostly RFC, but it does seem
> > to work for me.
> > 
> > Read-only APIC ID is also somewhat RFC.
> > 
> > Some of these patches are preparation for support for nested AVIC
> > which I almost done developing, and will start testing very soon.
> > 
> > Resend with cleaned up CCs.
> 
> 1-9 are all bugfixes and pretty small, so I queued them.
> 
> 10 is also a bugfix but I think it should be split up further, so I'll 
> resend it.

> 
> For 11-30 I'll start reviewing them, but most of them are independent 
> series.

Thank you very much!
 
I must again say sorry that I posted the whole thing as a one patch series,
next time I'll post each series separately, and I also try to post
the patches as soon as I write them.
 
 I didn't post them because I felt that the whole thing needs good testing 
and I only recently gotten to somewhat automate my nested migration tests 
which I usually use to test this kind of work.
 
 

Best regards,
	Maxim Levitsky
 
PS: the strict_mmu option does have quite an effect on nested migration with npt=0/ept=0.
In my testing such migration crashes with pagefault in L2 kernel after around 50-100
iterations, while with this options, on survived ~1000 iterations and around the same on intel,
and on both machines L1 eventually crashed with a page fault instead.
 
Could be that it just throws timing off, or maybe we still do have some form of bug
in shadow paging after all, maybe even 2 bugs.
Hmmm....
 
I automated these tests so I can run them for days until I have more confidence
in what is going on.



Best regards,
	Maxim Levitsky

> 
> Paolo
>