From: Wei Liu <wei.liu@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Sean Christopherson <seanjc@google.com>,
Marc Zyngier <maz@kernel.org>,
Oliver Upton <oliver.upton@linux.dev>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Tianrui Zhao <zhaotianrui@loongson.cn>,
Bibo Mao <maobibo@loongson.cn>,
Huacai Chen <chenhuacai@kernel.org>,
Anup Patel <anup@brainfault.org>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Paolo Bonzini <pbonzini@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
Andy Lutomirski <luto@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
Joel Fernandes <joelagnelf@nvidia.com>,
Josh Triplett <josh@joshtriplett.org>,
Boqun Feng <boqun.feng@gmail.com>,
Uladzislau Rezki <urezki@gmail.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
kvm@vger.kernel.org, loongarch@lists.linux.dev,
kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org,
linux-hyperv@vger.kernel.org, rcu@vger.kernel.org
Subject: Re: [PATCH 0/5] Drivers: hv: Fix NEED_RESCHED_LAZY and use common APIs
Date: Mon, 25 Aug 2025 22:26:38 +0000 [thread overview]
Message-ID: <aKzjHjtI2fbFjBpe@liuwe-devbox-ubuntu-v2.tail21d00.ts.net> (raw)
In-Reply-To: <20250825222319.GO3419281@noisy.programming.kicks-ass.net>
On Tue, Aug 26, 2025 at 12:23:19AM +0200, Peter Zijlstra wrote:
> On Mon, Aug 25, 2025 at 01:06:17PM -0700, Sean Christopherson wrote:
> > Fix a bug where MSHV root partitions don't honor NEED_RESCHED_LAZY, and then
> > deduplicate the TIF related MSHV code by turning the "kvm" entry APIs into
> > more generic "virt" APIs (which ideally would have been done when MSHV root
> > support was added).
> >
> > Assuming all is well, maybe this could go through the tip tree?
> >
> > The Hyper-V stuff and non-x86 architectures are compile-tested only.
>
> I suspect there's more of this wreckage in the new VTL driver that
> they just put in:
>
> https://lore.kernel.org/all/20250729051436.190703-3-namjain@linux.microsoft.com/
>
> although ideally they rip that thing out. I don't know how that code can
> ever be correct.
Please give us some time, Peter. I have asked the corresponding team to
respond to your comments.
Wei
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next prev parent reply other threads:[~2025-08-25 22:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-25 20:06 [PATCH 0/5] Drivers: hv: Fix NEED_RESCHED_LAZY and use common APIs Sean Christopherson
2025-08-25 20:06 ` [PATCH 1/5] Drivers: hv: Move TIF pre-guest work handling fully into mshv_common.c Sean Christopherson
2025-08-25 20:06 ` [PATCH 2/5] Drivers: hv: Handle NEED_RESCHED_LAZY before transferring to guest Sean Christopherson
2025-08-25 20:06 ` [PATCH 3/5] entry/kvm: KVM: Move KVM details related to signal/-EINTR into KVM proper Sean Christopherson
2025-08-25 20:06 ` [PATCH 4/5] entry: Rename "kvm" entry code assets to "virt" to genericize APIs Sean Christopherson
2025-08-25 20:06 ` [PATCH 5/5] Drivers: hv: Use common "entry virt" APIs to do work before running guest Sean Christopherson
2025-08-25 21:45 ` [PATCH 0/5] Drivers: hv: Fix NEED_RESCHED_LAZY and use common APIs Wei Liu
2025-08-25 22:23 ` Peter Zijlstra
2025-08-25 22:26 ` Wei Liu [this message]
2025-08-25 23:08 ` Nuno Das Neves
2025-08-26 0:27 ` Sean Christopherson
2025-08-26 16:58 ` Wei Liu
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