| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <s5hab2zc18e.wl%tiwai@suse.de> Date: Mon, 20 Jul 2009 08:33:37 +0200 From: Takashi Iwai <tiwai@...e.de> To: Piotr Kaczuba <piotr@...ika.ath.cx> Cc: linux-kernel@...r.kernel.org Subject: Re: [ALSA] emu10k1: hw_ptr skipping when unpausing mplayer At Sat, 18 Jul 2009 16:07:07 +0000 (UTC), Piotr Kaczuba wrote: > > Since 2.6.30 I'm experiencing sound and video stuttering when unpausing > mplayer. The soundcard is an Audigy 1, driver is emu10k1. Kernel is > x86_64, userspace is 32-bit. I doesn't happen always, but regularly > enough. To be sure -- isn't it arch-independent? I guess 64bit user-space can cause the same problem. > > > Below is the ouput of mplayer: > > [AO_ALSA] alsa-lib: pcm.c:6482:(snd_pcm_mmap_commit) commit offset (8886) > doesn't match with appl_ptr (139955) % buf_size (16384) > [AO_ALSA] Write error: Broken pipe > [AO_ALSA] Trying to reset soundcard. > [AO_ALSA] alsa-lib: pcm_hw.c:578:(snd_pcm_hw_prepare) > SNDRV_PCM_IOCTL_PREPARE failed: Device or resource busy > [AO_ALSA] alsa-lib: pcm_hw.c:578:(snd_pcm_hw_prepare) > SNDRV_PCM_IOCTL_PREPARE failed: Device or resource busy > [AO_ALSA] alsa-lib: pcm_hw.c:578:(snd_pcm_hw_prepare) > SNDRV_PCM_IOCTL_PREPARE failed: Device or resource busy > [AO_ALSA] pcm prepare error: Device or resource busy Hm, these errors in snd_pcm_hw_prepare look different. Maybe it's a bug in libao, but needs more investigation. > After setting xrun_debug to 5 I get the following in the log: > > PCM: hw_ptr skipping! [Q] (pos=3071, delta=17225, period=1024, > jdelta=18/358/0) > Pid: 0, comm: swapper Not tainted 2.6.30.1-orbiter.x86-64.1 #1 > Call Trace: > <IRQ> [<ffffffffa02d7c7f>] ? snd_pcm_period_elapsed+0x4df/0x520 > [snd_pcm] > [<ffffffffa031f15f>] ? snd_emu10k1_interrupt+0x25f/0x550 [snd_emu10k1] > [<ffffffff8023a9ba>] ? run_timer_softirq+0x1a/0x250 > [<ffffffff80268e99>] ? handle_IRQ_event+0x39/0xe0 > [<ffffffff8026ad19>] ? handle_fasteoi_irq+0x79/0x110 > [<ffffffff8020dd17>] ? handle_irq+0x17/0x20 > [<ffffffff8020d7c1>] ? do_IRQ+0x51/0xd0 > [<ffffffff8020bd13>] ? ret_from_intr+0x0/0x9 > <EOI> [<ffffffff8021bea0>] ? lapic_next_event+0x0/0x20 > [<ffffffff802127aa>] ? default_idle+0x3a/0x40 > [<ffffffff8020a017>] ? cpu_idle+0x47/0xa0 > [<ffffffff805a5aba>] ? start_kernel+0x2c3/0x384 > [<ffffffff805a5373>] ? x86_64_start_kernel+0xe1/0xf2 > PCM: hw_ptr skipping! (pos=5482, delta=3434, period=1024, jdelta=50/71) > Pid: 2870, comm: mplayer Not tainted 2.6.30.1-orbiter.x86-64.1 #1 > Call Trace: > [<ffffffffa02d6bd3>] ? snd_pcm_update_hw_ptr+0x1d3/0x220 [snd_pcm] > [<ffffffffa02d211d>] ? snd_pcm_hwsync+0x9d/0xe0 [snd_pcm] > [<ffffffffa02d54e3>] ? snd_pcm_ioctl_compat+0x753/0x980 [snd_pcm] > [<ffffffff80209b36>] ? __switch_to+0x226/0x270 > [<ffffffff80475407>] ? thread_return+0x30/0x1f9 > [<ffffffff8024a032>] ? hrtimer_cancel+0x12/0x20 > [<ffffffff80476710>] ? do_nanosleep+0x30/0xb0 > [<ffffffff8024a0e0>] ? hrtimer_nanosleep+0xa0/0x130 > [<ffffffff802ddd8b>] ? compat_sys_ioctl+0x19b/0x3e0 > [<ffffffff8024d3bb>] ? getnstimeofday+0x5b/0xe0 > [<ffffffff80266b56>] ? audit_syscall_entry+0x166/0x190 > [<ffffffff80227266>] ? cstar_dispatch+0x7/0x26 > PCM: hw_ptr skipping! [Q] (pos=7443, delta=5395, period=1024, > jdelta=91/112/2) > Pid: 2870, comm: mplayer Not tainted 2.6.30.1-orbiter.x86-64.1 #1 > Call Trace: > <IRQ> [<ffffffffa02d7c7f>] ? snd_pcm_period_elapsed+0x4df/0x520 > [snd_pcm] > [<ffffffffa031f15f>] ? snd_emu10k1_interrupt+0x25f/0x550 [snd_emu10k1] > [<ffffffff80268e99>] ? handle_IRQ_event+0x39/0xe0 > [<ffffffff8022cd9d>] ? try_to_wake_up+0x14d/0x160 > [<ffffffff8026ad19>] ? handle_fasteoi_irq+0x79/0x110 > [<ffffffff8020dd17>] ? handle_irq+0x17/0x20 > [<ffffffff8020d7c1>] ? do_IRQ+0x51/0xd0 > [<ffffffff8020bd13>] ? ret_from_intr+0x0/0x9 > [<ffffffff8021bea0>] ? lapic_next_event+0x0/0x20 > [<ffffffff802354bd>] ? __do_softirq+0x3d/0xf0 > [<ffffffff8020c2ea>] ? call_softirq+0x1a/0x30 > [<ffffffff8020dcbd>] ? do_softirq+0x2d/0x70 > [<ffffffff802352a5>] ? irq_exit+0x85/0xa0 > [<ffffffff8021c74e>] ? smp_apic_timer_interrupt+0x4e/0x80 > [<ffffffff8020be63>] ? apic_timer_interrupt+0x13/0x20 > <EOI> [<ffffffffa02d20d9>] ? snd_pcm_hwsync+0x59/0xe0 [snd_pcm] > [<ffffffffa02d211d>] ? snd_pcm_hwsync+0x9d/0xe0 [snd_pcm] > [<ffffffffa02d54e3>] ? snd_pcm_ioctl_compat+0x753/0x980 [snd_pcm] > [<ffffffff80209b36>] ? __switch_to+0x226/0x270 > [<ffffffff80475407>] ? thread_return+0x30/0x1f9 > [<ffffffff8024a032>] ? hrtimer_cancel+0x12/0x20 > [<ffffffff80476710>] ? do_nanosleep+0x30/0xb0 > [<ffffffff8024a0e0>] ? hrtimer_nanosleep+0xa0/0x130 > [<ffffffff802ddd8b>] ? compat_sys_ioctl+0x19b/0x3e0 > [<ffffffff8024d3bb>] ? getnstimeofday+0x5b/0xe0 > [<ffffffff80266b56>] ? audit_syscall_entry+0x166/0x190 > [<ffffffff80227266>] ? cstar_dispatch+0x7/0x26 > > The log is virtually flooded with these messages until I interrupt > mplayer. It's endless because the reset failed in the above. The problem is likely due to some wrong operation in the pause/restart. Does the patch below work around a problem? If this works (somehow, not causing the same error), we can focus more on the pause implementation of emu10k1. thanks, Takashi --- diff --git a/sound/pci/emu10k1/emupcm.c b/sound/pci/emu10k1/emupcm.c index 55b83ef..ae405a4 100644 --- a/sound/pci/emu10k1/emupcm.c +++ b/sound/pci/emu10k1/emupcm.c @@ -953,7 +953,7 @@ static struct snd_pcm_hardware snd_emu10k1_playback = .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_RESUME | - SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE), + SNDRV_PCM_INFO_MMAP_VALID /*| SNDRV_PCM_INFO_PAUSE*/), .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_96000, .rate_min = 4000, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists