From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AIpwx4/h1aqlCM+V5N9Je4fzmkbPeM5be4t64LXnBoMamXlqVWQru77oSubn2hNaZStWAsGAu0Yd ARC-Seal: i=1; a=rsa-sha256; t=1524053321; cv=none; d=google.com; s=arc-20160816; b=ziIhnPSjB5arqToqk21LQCQZk/CLUrZ1GUOwKfEbHWIqbD6rbt5UCTMX8cuPEzW3Vu yNyk3Nk4qbiaEsai4WcEiLAzBkSXnIBI9Um0BROGgj2B13Jc7/rd7ungRALmtd9l9fbT O9w50/MkbqJmrXMKSSTomwaTP6XLGNDBrtmetui7209+nx28plPnv5VFlR189Toeo3VG 3GwFCXPJdqq+GZbVcXIf0P8D2cL11fnhmrojRdna0IwEfQU51AB0XYj95Hj/pm31Zcjz KpJJFVcxnrhgn9eUjNUNpkyqM/14X0+mhg3MTNZnYns3THQj0UoquP9v40dki4IVCXLj uTKg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :mail-followup-to:message-id:subject:cc:to:from:date :arc-authentication-results; bh=tEuV75JirpPjAdq6g61jZb2/IN4uFDH3ZQLdLSi+J0o=; b=E8g4J9yzRD7PmbeiR77mxNrYggunkAsUK2cl2PNg6sLK6rVV0pKV+6FjoKVfohxYXC Uxsj7T1WRO830VrpQVMSCi4x9FhCMBrm0TdXPA7THUIUI31VEzx4giYjPCm0jo3Zjswj YBCTbk1o3F0Ozrlg98rhLJ3segLko+K+3TXQbGJ2AODia0DowFRlP9mpA8GrogrksfGH 8i7znWq5ND4j7tHgB51/AoArEXZuMoaW332rJAZCUf4QPebDysRF6rZRULZ9ZKdeUSzd 6a6/aj80FJvBMnANOAqOuTYFnfww5bu9FeFVL1EAewIUbg57SefdU1u/Pu4MRQdvV5y2 0mjg== ARC-Authentication-Results: i=1; mx.google.com; spf=neutral (google.com: 213.155.227.146 is neither permitted nor denied by best guess record for domain of vitezslav@samel.cz) smtp.mailfrom=vitezslav@samel.cz Authentication-Results: mx.google.com; spf=neutral (google.com: 213.155.227.146 is neither permitted nor denied by best guess record for domain of vitezslav@samel.cz) smtp.mailfrom=vitezslav@samel.cz Date: Wed, 18 Apr 2018 14:08:40 +0200 From: Vitezslav Samel To: Borislav Petkov Cc: Ashok Raj , Greg Kroah-Hartman , linux-kernel@vger.kernel.org Subject: Re: 4.15.17 regression: bisected: timeout during microcode update Message-ID: <20180418120839.GA5655@pc11.op.pod.cz> Mail-Followup-To: Borislav Petkov , Ashok Raj , Greg Kroah-Hartman , linux-kernel@vger.kernel.org References: <20180418081140.GA2439@pc11.op.pod.cz> <20180418100721.GA5866@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180418100721.GA5866@pd.tnic> User-Agent: Mutt/1.9.4 (2018-02-28) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1598070825045426546?= X-GMAIL-MSGID: =?utf-8?q?1598085735834046336?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Wed, Apr 18, 2018 at 12:07:21PM +0200, Borislav Petkov wrote: > On Wed, Apr 18, 2018 at 10:11:40AM +0200, Vitezslav Samel wrote: > > Could be done anything to prevent this panic? > > Yes, for starters, is there anything preventing you from using an initrd > and doing early microcode loading? > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/x86/microcode.txt > > If no, consider doing that and not using the late method which is > problematic at best. I switched to firmware-in-kernel early loading and that works OK. But still, the reported issue is regression in 4.15.17 and 4.16+. Thanks, Vita