From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760324AbXK1NKH (ORCPT ); Wed, 28 Nov 2007 08:10:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756627AbXK1NJ5 (ORCPT ); Wed, 28 Nov 2007 08:09:57 -0500 Received: from fxip-0047f.externet.hu ([88.209.222.127]:44130 "EHLO dorka.pomaz.szeredi.hu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756413AbXK1NJ5 (ORCPT ); Wed, 28 Nov 2007 08:09:57 -0500 To: mingo@elte.hu CC: jdike@addtoit.com, user-mode-linux-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org In-reply-to: <20071128125030.GB21791@elte.hu> (message from Ingo Molnar on Wed, 28 Nov 2007 13:50:30 +0100) Subject: Re: -rt doesn't compile for UML References: <20071128125030.GB21791@elte.hu> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Message-Id: From: Miklos Szeredi Date: Wed, 28 Nov 2007 14:09:45 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > * Miklos Szeredi wrote: > > > When writing a big file to a ubd disk, everything in uml slows down to > > a crawl, even though CPU usage is minimal. > > > > So I wanted to try the latency tracer from -rt, but it doesn't compile > > with UML: > > note that there are standalone patches as well: > > http://people.redhat.com/mingo/latency-tracing-patches/ > > so there's no forced need to use -rt. Ah, forgotten about that. Unfortunately the latency tracer patch doesn't compile either: CC kernel/latency_trace.o kernel/latency_trace.c:28:21: error: asm/rtc.h: No such file or directory kernel/latency_trace.c:63:3: error: #error Implement cycles_to_usecs. kernel/latency_trace.c: In function ‘____trace’: kernel/latency_trace.c:658: error: implicit declaration of function ‘irqs_disabled_flags’ make[1]: *** [kernel/latency_trace.o] Error 1 Miklos