Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752682AbbFNXip (ORCPT ); Sun, 14 Jun 2015 19:38:45 -0400 Received: from mail-wg0-f53.google.com ([74.125.82.53]:35488 "EHLO mail-wg0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752326AbbFNXil (ORCPT ); Sun, 14 Jun 2015 19:38:41 -0400 Message-ID: <1434325118.1999.5.camel@googlemail.com> Subject: Re: lockup when C1E and high-resolution timers enabled From: Christoph Fritz Reply-To: chf.fritz@googlemail.com To: Daniel J Blueman Cc: Linux Kernel Date: Mon, 15 Jun 2015 01:38:38 +0200 In-Reply-To: References: <1434256796.1699.5.camel@googlemail.com> <1434293384.14412.1.camel@googlemail.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.9-1+b1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 613 Lines: 15 On Sun, 2015-06-14 at 23:24 +0800, Daniel J Blueman wrote: > val=0x$(setpci -s 00:18.3 0xd4.l) # read D18F3xD4 > val=$((val &~(1 << 13))) # clear bit13 (MTC1eEn) > setpci -d 1022:1603 0xd4.l=$(printf %x $val) # write back This slows down the whole system dramatically: - before: MTC1eEn set: Booting takes 11 secs - after : MTC1eEn cleared: Booting takes 53 secs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/