Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262424AbUKDUbR (ORCPT ); Thu, 4 Nov 2004 15:31:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262423AbUKDUaz (ORCPT ); Thu, 4 Nov 2004 15:30:55 -0500 Received: from av4-1-sn3.vrr.skanova.net ([81.228.9.111]:58534 "EHLO av4-1-sn3.vrr.skanova.net") by vger.kernel.org with ESMTP id S262424AbUKDU0y (ORCPT ); Thu, 4 Nov 2004 15:26:54 -0500 To: Gerd Knorr Cc: linux-kernel list , Eyal Lebedinsky Subject: Re: 2.6.10-rc1 bttv oops in btcx_riscmem_free References: <41839BFC.1070302@eyal.emu.id.au> <20041104112953.GB4633@bytesex> From: Peter Osterlund Date: 04 Nov 2004 21:26:08 +0100 In-Reply-To: <20041104112953.GB4633@bytesex> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7033 Lines: 144 Gerd Knorr writes: > > I have similar problems using 2.6.10-rc1-bk8. Often when I exit > > tvtime, I get "unable to handle kernel paging request" or "unable to > > handle kernel NULL pointer", see below. > > Any more hints how to trigger that? I can't reproduce that on my > machines, neither with xawtv nor tvtime. If I run while true ; do tvtime ; done and hit 'q' repeatedly to stop tvtime, I always get the oops sooner or later. Usually <= 10 iterations are needed, but not always. It appears to be a race condition. > Any change when setting the triton=1 or vsfx=1 insmod options (probably > not, but who knows ...)? I tried triton1=1 and vsfx=1, but I still get the oops. > > Oct 30 14:12:55 p4 kernel: Call Trace: > > Oct 30 14:12:55 p4 kernel: [] btcx_riscmem_free+0x3d/0x84 [btcx_risc] > > Oct 30 14:12:55 p4 kernel: [] bttv_dma_free+0x74/0x9f [bttv] > > Hmm, I somehow miss either buffer_release or vbi_buffer_release here. > Do you have KALLSYMS enabled? Does tvtime use video only or vbi as > well? Yes I have KALLSYMS enabled. I don't know why the backtrace is incomplete, but I added printk's and saw that it's buffer_release() that calls bttv_dma_free(). According to strace, tvtime doesn't open any /dev/vbi* device. > Can you try to enable debug=1 for the video-buf module? vbuf: reqbufs: bufs=4, size=0xcb000 [812 pages total] vbuf: mmap setup: 4 buffers, 831488 bytes each vbuf: mmap eab9d520: b7cac000-b7d77000 pgoff 00000000 bufs 0-0 vbuf: mmap f10449e0: b7be1000-b7cac000 pgoff 000000cb bufs 1-1 vbuf: mmap f10443e0: b7b16000-b7be1000 pgoff 00000196 bufs 2-2 vbuf: mmap f1044c40: b7a4b000-b7b16000 pgoff 00000261 bufs 3-3 vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: munmap eab9d520 vbuf: munmap f10449e0 vbuf: munmap f10443e0 vbuf: munmap f1044c40 vbuf: reqbufs: bufs=4, size=0xcb000 [812 pages total] vbuf: mmap setup: 4 buffers, 831488 bytes each vbuf: mmap f1044c40: b7cac000-b7d77000 pgoff 00000000 bufs 0-0 vbuf: mmap f10443e0: b7be1000-b7cac000 pgoff 000000cb bufs 1-1 vbuf: mmap f10449e0: b7b16000-b7be1000 pgoff 00000196 bufs 2-2 vbuf: mmap eab9d520: b7a4b000-b7b16000 pgoff 00000261 bufs 3-3 vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: munmap f1044c40 vbuf: munmap f10443e0 vbuf: munmap f10449e0 vbuf: munmap eab9d520 vbuf: reqbufs: bufs=4, size=0xcb000 [812 pages total] vbuf: mmap setup: 4 buffers, 831488 bytes each vbuf: mmap eab9d520: b7cac000-b7d77000 pgoff 00000000 bufs 0-0 vbuf: mmap f10449e0: b7be1000-b7cac000 pgoff 000000cb bufs 1-1 vbuf: mmap f10443e0: b7b16000-b7be1000 pgoff 00000196 bufs 2-2 vbuf: mmap f1044c40: b7a4b000-b7b16000 pgoff 00000261 bufs 3-3 vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: init user [0xb7cac000+0xcb000 => 203 pages] vbuf: init user [0xb7be1000+0xcb000 => 203 pages] vbuf: init user [0xb7b16000+0xcb000 => 203 pages] vbuf: init user [0xb7a4b000+0xcb000 => 203 pages] vbuf: munmap eab9d520 Unable to handle kernel paging request at virtual address 00ffffff printing eip: c010a237 *pde = 00000000 Oops: 0000 [#1] PREEMPT Modules linked in: bttv video_buf tuner tda9887 msp3400 firmware_class v4l2_common btcx_risc videodev snd_mixer_oss snd_emu10k1 snd_rawmidi snd_ac97_codec snd_pcm snd_timer snd_page_alloc snd_util_mem snd_hwdep snd soundcore radeon nfsd exportfs lockd parport_pc lp parport autofs4 sunrpc ipt_MASQUERADE iptable_nat ipt_LOG ipt_limit ipt_state ipt_REJECT iptable_filter ip_tables dm_mod sd_mod usb_storage uhci_hcd ehci_hcd rtc CPU: 0 EIP: 0060:[] Not tainted VLI EFLAGS: 00210206 (2.6.10-rc1-bk8) EIP is at dma_free_coherent+0x30/0x67 eax: 00000000 ebx: e9ca5000 ecx: e9ca5000 edx: 00000000 esi: 00ffffff edi: e6e30c34 ebp: eb7fb080 esp: e9db5ee4 ds: 007b es: 007b ss: 0068 Process tvtime (pid: 4992, threadinfo=e9db4000 task=e8d96a60) Stack: ea990680 e6e30b80 f8a3203d ea9906c4 00000c38 e9ca5000 29ca5000 e6e30ba4 eaaacb80 f8d3ab35 ea990680 e6e30c34 00000000 00000000 eab9d520 ee3c84bc f8afbc55 eaaacb80 e6e30b80 00035000 eb7fb080 e9db4000 e9db4000 eaaac980 Call Trace: [] btcx_riscmem_free+0x3d/0x84 [btcx_risc] [] bttv_dma_free+0x74/0x9f [bttv] [] videobuf_vm_close+0x97/0xc9 [video_buf] [] remove_vm_struct+0x8e/0x97 [] unmap_vma_list+0x1c/0x28 [] do_munmap+0x142/0x17f [] sys_munmap+0x44/0x64 [] syscall_call+0x7/0xb Code: 44 24 0c 8b 54 24 10 8b 5c 24 14 85 c0 74 06 8b b0 b8 00 00 00 8d 42 ff ba ff ff ff ff c1 e8 0b 83 c2 01 d1 e8 75 f9 85 f6 74 13 <8b> 0e 39 cb 72 0d 8b 46 08 c1 e0 0c 8d 04 08 39 c3 72 09 89 d8 -- Peter Osterlund - petero2@telia.com http://w1.894.telia.com/~u89404340 - 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/