Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268334AbUJDRUo (ORCPT ); Mon, 4 Oct 2004 13:20:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268335AbUJDRUo (ORCPT ); Mon, 4 Oct 2004 13:20:44 -0400 Received: from mustang.oldcity.dca.net ([216.158.38.3]:18605 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S268334AbUJDRUj (ORCPT ); Mon, 4 Oct 2004 13:20:39 -0400 Subject: Re: [patch] voluntary-preempt-2.6.9-rc2-mm4-S7 From: Lee Revell To: Ingo Molnar Cc: linux-kernel , "K.R. Foley" , Rui Nuno Capela In-Reply-To: <20041004101711.GA21029@elte.hu> References: <20040922103340.GA9683@elte.hu> <20040923122838.GA9252@elte.hu> <20040923211206.GA2366@elte.hu> <20040924074416.GA17924@elte.hu> <20040928000516.GA3096@elte.hu> <1096785457.1837.0.camel@krustophenia.net> <1096786248.1837.4.camel@krustophenia.net> <1096787179.1837.8.camel@krustophenia.net> <20041003195725.GA31882@elte.hu> <1096851180.16648.2.camel@krustophenia.net> <20041004101711.GA21029@elte.hu> Content-Type: text/plain Message-Id: <1096910438.16648.15.camel@krustophenia.net> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Mon, 04 Oct 2004 13:20:38 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2996 Lines: 50 On Mon, 2004-10-04 at 06:17, Ingo Molnar wrote: > * Lee Revell wrote: > > > Here is an almost identical one (it's even exactly 507 usecs!). This > > and the one I sent previously were apparently caused by switching from > > X to a text console and back. > > ah, it's the VGA console: > > > Sep 2 16:13:49 krustophenia kernel: [_mmx_memcpy+314/384] _mmx_memcpy+0x13a/0x180 > > Sep 2 16:13:49 krustophenia kernel: [vgacon_save_screen+120/128] vgacon_save_screen+0x78/0x80 > > Sep 2 16:13:49 krustophenia kernel: [redraw_screen+411/560] redraw_screen+0x19b/0x230 > > now i'm wondering why that's running with preemption disabled - i > thought we fixed that. > Same here. But, here's the actual trace from S7 (that one was Q something). It is indeed the VGA console. Oct 3 02:58:08 krustophenia kernel: (events/0/3): new 507 us maximum-latency critical section. Oct 3 02:58:08 krustophenia kernel: => started at: Oct 3 02:58:08 krustophenia kernel: => ended at: <_mmx_memcpy+0x13a/0x180> Oct 3 02:58:08 krustophenia kernel: [check_preempt_timing+330/480] check_preempt_timing+0x14a/0x1e0 Oct 3 02:58:08 krustophenia kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20 Oct 3 02:58:08 krustophenia kernel: [sub_preempt_count+74/112] sub_preempt_count+0x4a/0x70 Oct 3 02:58:08 krustophenia kernel: [_mmx_memcpy+314/384] _mmx_memcpy+0x13a/0x180 Oct 3 02:58:08 krustophenia kernel: [_mmx_memcpy+314/384] _mmx_memcpy+0x13a/0x180 Oct 3 02:58:08 krustophenia kernel: [vgacon_save_screen+120/128] vgacon_save_screen+0x78/0x80 Oct 3 02:58:08 krustophenia kernel: [redraw_screen+411/560] redraw_screen+0x19b/0x230 Oct 3 02:58:08 krustophenia kernel: [complete_change_console+44/224] complete_change_console+0x2c/0xe0 Oct 3 02:58:08 krustophenia kernel: [console_callback+258/272] console_callback+0x102/0x110 Oct 3 02:58:08 krustophenia kernel: [worker_thread+559/1088] worker_thread+0x22f/0x440 Oct 3 02:58:08 krustophenia kernel: [console_callback+0/272] console_callback+0x0/0x110 Oct 3 02:58:08 krustophenia kernel: [default_wake_function+0/32] default_wake_function+0x0/0x20 Oct 3 02:58:08 krustophenia kernel: [schedule+829/1712] schedule+0x33d/0x6b0 Oct 3 02:58:08 krustophenia kernel: [default_wake_function+0/32] default_wake_function+0x0/0x20 Oct 3 02:58:08 krustophenia kernel: [mcount+20/24] mcount+0x14/0x18 Oct 3 02:58:08 krustophenia kernel: [kthread+180/192] kthread+0xb4/0xc0 Oct 3 02:58:08 krustophenia kernel: [worker_thread+0/1088] worker_thread+0x0/0x440 Oct 3 02:58:08 krustophenia kernel: [kthread+0/192] kthread+0x0/0xc0 Oct 3 02:58:08 krustophenia kernel: [kernel_thread_helper+5/16] kernel_thread_helper+0x5/0x10 Lee - 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/