From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267278AbUGNBIu (ORCPT ); Tue, 13 Jul 2004 21:08:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267280AbUGNBIu (ORCPT ); Tue, 13 Jul 2004 21:08:50 -0400 Received: from viper.oldcity.dca.net ([216.158.38.4]:24991 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S267278AbUGNBIo (ORCPT ); Tue, 13 Jul 2004 21:08:44 -0400 Subject: ALSA errors when renicing unrelated process From: Lee Revell To: linux-kernel Content-Type: text/plain Message-Id: <1089767321.2729.4.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Tue, 13 Jul 2004 21:08:42 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I have found that I can reliably produce the following errors by renicing the X server from -10 (the default on Debian) to 0 and back. I get the same error going from 0 to -10 as -10 back to 0, as if renicing the process causes some kind of hiccup in the scheduler. I do not seem to get XRUNs when this happens. Jul 13 21:02:13 mindpipe kernel: Jul 13 21:02:13 mindpipe kernel: ALSA /usr/src/alsa-cvs-1.0.5/alsa-driver/alsa-kernel/core/pcm_lib.c:199: Unexpected hw_pointer value [1] (stream = 0, delta: -31, max jitter = 32): wrong interrupt acknowledge? Jul 13 21:02:13 mindpipe kernel: [dump_stack+23/32] dump_stack+0x17/0x20 Jul 13 21:02:13 mindpipe kernel: [__crc_totalram_pages+46349/3558647] snd_pcm_period_elapsed+0x1a7/0x400 [snd_pcm] Jul 13 21:02:13 mindpipe kernel: [__crc_totalram_pages+115629/3558647] snd_emu10k1_interrupt+0x377/0x400 [snd_emu10k1] Jul 13 21:02:13 mindpipe kernel: [handle_IRQ_event+51/96] handle_IRQ_event+0x33/0x60 Jul 13 21:02:13 mindpipe kernel: [do_IRQ+165/368] do_IRQ+0xa5/0x170 Jul 13 21:02:13 mindpipe kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20 Jul 13 21:02:13 mindpipe kernel: [do_anonymous_page+124/384] do_anonymous_page+0x7c/0x180 Jul 13 21:02:13 mindpipe kernel: [do_no_page+78/784] do_no_page+0x4e/0x310 Jul 13 21:02:13 mindpipe kernel: [handle_mm_fault+193/368] handle_mm_fault+0xc1/0x170 Jul 13 21:02:13 mindpipe kernel: [do_page_fault+805/1356] do_page_fault+0x325/0x54c Jul 13 21:02:13 mindpipe kernel: [error_code+45/64] error_code+0x2d/0x40 Jul 13 21:02:13 mindpipe kernel: Jul 13 21:02:13 mindpipe kernel: ALSA /usr/src/alsa-cvs-1.0.5/alsa-driver/alsa-kernel/core/pcm_lib.c:199: Unexpected hw_pointer value [1] (stream = 0, delta: -31, max jitter = 32): wrong interrupt acknowledge? Jul 13 21:02:13 mindpipe kernel: [dump_stack+23/32] dump_stack+0x17/0x20 Jul 13 21:02:13 mindpipe kernel: [__crc_totalram_pages+46349/3558647] snd_pcm_period_elapsed+0x1a7/0x400 [snd_pcm] Jul 13 21:02:13 mindpipe kernel: [__crc_totalram_pages+115629/3558647] snd_emu10k1_interrupt+0x377/0x400 [snd_emu10k1] Jul 13 21:02:13 mindpipe kernel: [handle_IRQ_event+51/96] handle_IRQ_event+0x33/0x60 Jul 13 21:02:13 mindpipe kernel: [do_IRQ+165/368] do_IRQ+0xa5/0x170 Jul 13 21:02:13 mindpipe kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20 Jul 13 21:02:13 mindpipe kernel: [do_anonymous_page+124/384] do_anonymous_page+0x7c/0x180 Jul 13 21:02:13 mindpipe kernel: [do_no_page+78/784] do_no_page+0x4e/0x310 Jul 13 21:02:13 mindpipe kernel: [handle_mm_fault+193/368] handle_mm_fault+0xc1/0x170 Jul 13 21:02:13 mindpipe kernel: [do_page_fault+805/1356] do_page_fault+0x325/0x54c Jul 13 21:02:13 mindpipe kernel: [error_code+45/64] error_code+0x2d/0x40 Jul 13 21:02:13 mindpipe kernel: Lee