Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751513AbbD3QmX (ORCPT ); Thu, 30 Apr 2015 12:42:23 -0400 Received: from mail-ie0-f172.google.com ([209.85.223.172]:35172 "EHLO mail-ie0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750809AbbD3QmW (ORCPT ); Thu, 30 Apr 2015 12:42:22 -0400 MIME-Version: 1.0 In-Reply-To: <55422441.4040802@free.fr> References: <55422441.4040802@free.fr> Date: Thu, 30 Apr 2015 09:42:21 -0700 Message-ID: Subject: Re: High-resolution timers not supported when using smp_twd From: John Stultz To: Mason Cc: LKML , Thomas Gleixner , Catalin Marinas Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 693 Lines: 22 On Thu, Apr 30, 2015 at 5:46 AM, Mason wrote: > Hello, > > I wanted to enable high-resolution timers on this Cortex A9 system, > but it seems there is more to it than just enabling > > CONFIG_HIGH_RES_TIMERS=y > > (The system is limited to jiffy resolution.) You might make sure you've got a HRT enabled clocksource installed? You might check /sys/devices/system/clocksource/clocksource0/current_clocksource ? thanks -john -- 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/