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[80.40.237.196]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6dccd25a0c9sm36322796d6.33.2024.12.17.00.57.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Dec 2024 00:57:16 -0800 (PST) Date: Tue, 17 Dec 2024 08:57:11 +0000 From: Juri Lelli To: Ranguvar Cc: Sean Christopherson , Peter Zijlstra , Juri Lelli , "regressions@lists.linux.dev" , "regressions@leemhuis.info" , "linux-kernel@vger.kernel.org" , "kvm@vger.kernel.org" Subject: Re: [REGRESSION][BISECTED] from bd9bbc96e835: cannot boot Win11 KVM guest Message-ID: References: <20241214185248.GE10560@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On 16/12/24 20:40, Ranguvar wrote: > On Monday, December 16th, 2024 at 16:50, Sean Christopherson wrote: > > > > On Mon, Dec 16, 2024, Juri Lelli wrote: > > > > > On 14/12/24 19:52, Peter Zijlstra wrote: > > > > > > > On Sat, Dec 14, 2024 at 06:32:57AM +0000, Ranguvar wrote: > > > > > > > > > I have in kernel cmdline `iommu=pt isolcpus=1-7,17-23 rcu_nocbs=1-7,17-23 nohz_full=1-7,17-23`. Removing iommu=pt does not produce a change, and > > > > > dropping the core isolation freezes the host on VM startup. > > > > As in, dropping all of isolcpus, rcu_nocbs, and nohz_full? Or just dropping > > isolcpus? > > Thanks for looking. > I had dropped all three, but not altered the VM guest config, which is: > > > > > ... > > > > > ... > Are you disabling/enabling/configuring RT throttling (sched_rt_{runtime, period}_us) in your configuration? > > > CPU mode is host-passthrough, cache mode is passthrough. > > The 24GB VRAM did cause trouble when setting up resizeable BAR months ago as well. It necessitated a special qemu config: > > > > >