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From: Tycho Andersen <tycho@kernel.org>
To: Sean Christopherson <seanjc@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	torvalds@linux-foundation.org,  linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, Yosry Ahmed <yosry@kernel.org>
Subject: Re: [GIT PULL] KVM (mostly s390) fixes for Linux 7.2-rc7
Date: Mon, 10 Aug 2026 07:56:18 -0600	[thread overview]
Message-ID: <annX2lP-5cCgRJBe@tycho.pizza> (raw)
In-Reply-To: <anYQsMnpS2kpYoqA@google.com>

On Fri, Aug 07, 2026 at 10:06:56AM -0700, Sean Christopherson wrote:
> +Yosry
> 
> On Fri, Aug 07, 2026, Paolo Bonzini wrote:
> > - disable use of INVLPGA when NPT is enabled, because it doesn't seem
> >   to flush TLBs correctly
> 
> ...
> 
> > Paolo Bonzini (3):
> >       KVM: SVM: make svm_flush_tlb_gva do a full asid flush if NPT enabled
> 
> Why did this get rushed in?  There was quite a bit of discussion, both on the
> code itself[1][2] and on the assessment that this appears to be hardware issue[3].
> IMO, neither of those discussions was resolved enough to merge the patch as-is.

I have tried Pretty Hard to reproduce this and not been successful. I
asked Alexander offlist for his disk image last week to try with that,
but haven't received a response yet.

We would definitely like a reproducer and to look into exactly what's
going on here.

Thanks,

Tycho

      parent reply	other threads:[~2026-08-10 13:56 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-07 13:53 [GIT PULL] KVM (mostly s390) fixes for Linux 7.2-rc7 Paolo Bonzini
2026-08-07 15:18 ` pr-tracker-bot
2026-08-07 17:06 ` Sean Christopherson
2026-08-07 21:41   ` Paolo Bonzini
2026-08-07 22:39     ` Sean Christopherson
2026-08-08  5:43       ` Paolo Bonzini
2026-08-10 21:30         ` Yosry Ahmed
2026-08-10 13:56   ` Tycho Andersen [this message]

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