From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E8E4D2620F1 for ; Fri, 8 Aug 2025 22:59:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754693974; cv=none; b=YmUhjzqqQ5BILMyHgVPBdATxOQ3JgfnZfc41xux/RKNiLmIpk8EqOrU7ThapHCSZaSZmc746NQSH49XzfKiliBdbqHpxkRJ0It67Mu5TlIK9IzUSa19Io/eJET71hPILu4IjqlHdKygOqjZXaiYkz52s/7Qs396D6gHwjkvyKdE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754693974; c=relaxed/simple; bh=hfw6d65qE4NY1/7CpgoSiv6vEJ+cf8nu9gOj8B3/AWw=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=NzfIry7gIzYZt+C3AqXBRrXTAo/Q2hpvBxGC4PdNWWyxhZ33aVMpAdNYwNYN+SxzOWCLkt/1+sZ4cjKhxYJEQHFKviOtczaAEFOtk7hy9u0YLzgi37GhsqgWNsWRTw+t+jPQhgl09wh8liAbJIV2ktf5lwSVrfCUyRqM83inKI8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kSLrxZLq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kSLrxZLq" Received: by smtp.kernel.org (Postfix) with ESMTPS id 6372FC4CEF6 for ; Fri, 8 Aug 2025 22:59:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754693973; bh=hfw6d65qE4NY1/7CpgoSiv6vEJ+cf8nu9gOj8B3/AWw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=kSLrxZLqJyT96f0aQdB7rOTt81aXuGlqYSZ2O2+43aZ+CsLBBiKL3VWOZ8MTEfnWG 7G4znr/ssUg2uFmHBj1N9vsJksaXojxHZpypDhBS7fOqgKC0w+a5PwVcayPv4or0uW fO9zyUc1GtU9y0ICe+aQSN/2HrEc6iNsv30qnhppZo8nebVWrugqhAoWJd/N8nag/y cHgk19aDlMDJj8iV5IZfAbM7whJQpusJssAT82KPXhVT6gWGWIa75yo2HkQsywhOE9 P7LRtL561VHhAKKucdcmCdb1NEVritrZctmWh55J4k5rYHh1lKY7L2sdmcKDw9cUjH nzd/90W5xyS/A== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 5CCC2C433E1; Fri, 8 Aug 2025 22:59:33 +0000 (UTC) From: bugzilla-daemon@kernel.org To: kvm@vger.kernel.org Subject: [Bug 218792] Guest call trace with mwait enabled Date: Fri, 08 Aug 2025 22:59:33 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Product: Virtualization X-Bugzilla-Component: kvm X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: seanjc@google.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D218792 --- Comment #7 from Sean Christopherson (seanjc@google.com) --- On Fri, Aug 08, 2025, bugzilla-daemon@kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=3D218792 >=20 > Len Brown (lenb@kernel.org) changed: >=20 > What |Removed |Added > -------------------------------------------------------------------------= --- > CC| |lenb@kernel.org >=20 > --- Comment #6 from Len Brown (lenb@kernel.org) --- > Re: intel_idle >=20 > I agree that the SDM doesn't guarantee this MSR exists > based on the presence of PC10. >=20 > I'm not opposed to _safe(). >=20 > but... >=20 > Why is this "platform" advertising PC10 (or any MWAIT C-states) to intel_= idle > in the first place? Because letting the guest execute MONITOR/MWAIT natively, and thus get into deeper sleep states, is advantageous for all the same reasons bare metal CPUs want= to get into deep sleep states, e.g. to let active cores hit higher turbo bins. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=