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Thu, 28 Nov 2024 03:22:53 -0800 (PST) Received: from google.com ([2401:fa00:8f:203:e87e:5233:193f:13e1]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-21530753d15sm4336945ad.52.2024.11.28.03.22.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Nov 2024 03:22:52 -0800 (PST) Date: Thu, 28 Nov 2024 20:22:46 +0900 From: Sergey Senozhatsky To: Zhang Rui Cc: hpa@zytor.com, peterz@infradead.org, thorsten.blum@toblux.com, yuntao.wang@linux.dev, tony.luck@intel.com, len.brown@intel.com, srinivas.pandruvada@intel.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, rafael.j.wysocki@intel.com, x86@kernel.org, linux-pm@vger.kernel.org, Sergey Senozhatsky Subject: Re: bisected: [PATCH V4] x86/apic: Always explicitly disarm TSC-deadline timer Message-ID: <20241128112246.GF10431@google.com> References: <20241128111844.GE10431@google.com> 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: <20241128111844.GE10431@google.com> On (24/11/28 20:18), Sergey Senozhatsky wrote: > > Disable the TSC Deadline timer in lapic_timer_shutdown() by writing to > > MSR_IA32_TSC_DEADLINE when in TSC-deadline mode. Also avoid writing > > to the initial-count register (APIC_TMICT) which is ignored in > > TSC-deadline mode. Upstream commit ffd95846c6ec6cf1f93da411ea10d504036cab42 (forgot to mention)