Alan Stern schrieb: > On Sun, 8 Jul 2007, Markus Rechberger wrote: > >> On 7/8/07, Christoph <[EMAIL PROTECTED]> wrote: >>> Hallo Markus! >>> >>> I'm using a Pinnacle PCTV DVB-T for several months now without serious >>> problems. >>> So far I used it only with my Notebook. Now I set up a Mini-ITX Machine with >>> MythTV running 24/24h. >>> >>> The machine freezes ~36h ... black screen, even no sysrq. (Debian etch >>> 2.6.18-4-k7). >>> So I setup kexec, kernel 2.6.21, v4l 5877:e9a7be188b2b and now I got a >>> backtrace: >>> >>> <1>[16645.528000] BUG: unable to handle kernel NULL pointer dereference at >>> virtual address 0 >>> 0000068 >>> [...] >>> [16645.528000] EIP is at end_unlink_async+0x1b/0xc5 [ehci_hcd] >>> [16645.528000] eax: 00000060 ebx: de4f20dc ecx: df912020 edx: df8f0b57 >>> [16645.528000] esi: 00000000 edi: de4f20dc ebp: c58a9d4c esp: c58a9d40 >>> [16645.528000] ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068 >>> [16645.528000] Process mythbackend (pid: 12863, ti=c58a8000 task=dbb3d070 >>> task.ti=c58a8000) >>> [16645.528000] Stack: 00000020 00000000 de4f20dc c58a9dbc df8ed7d6 d74ba800 >>> de4f20dc de4f20d >>> c >>> [16645.528000] dd9bd080 c58a9d78 df8ed22a de4f20dc 00000000 de4f20dc >>> c58a9de8 df8ed7d >>> 6 >>> [16645.528000] 000000bc c58a9d9c 00000292 00000000 00000000 c56ce254 >>> de4f20dc 0000000 >>> 0 >>> [16645.528000] Call Trace: >>> [16645.528000] [<c0104a3e>] show_trace_log_lvl+0x1a/0x2f >>> [16645.528000] [<c0104aee>] show_stack_log_lvl+0x9b/0xa3 >>> [16645.528000] [<c0104cac>] show_registers+0x1b6/0x288 >>> [16645.528000] [<c0104e68>] die+0xea/0x1bd >>> [16645.528000] [<c0113bcf>] do_page_fault+0x435/0x506 >>> [16645.528000] [<c0289cbc>] error_code+0x74/0x7c >>> [16645.528000] [<df8ed7d6>] ehci_work+0x22/0x64b [ehci_hcd] >>> [16645.528000] [<df8f21b5>] ehci_irq+0x234/0x254 [ehci_hcd] >>> [16645.528000] [<df8a83af>] usb_hcd_irq+0x24/0x51 [usbcore] >>> [16645.528000] [<c013b3e2>] handle_IRQ_event+0x21/0x48 >>> [16645.528000] [<c013c515>] handle_level_irq+0x5f/0x96 >>> [16645.528000] [<c0105f8a>] do_IRQ+0x5c/0x7a >>> [16645.528000] [<c010453f>] common_interrupt+0x23/0x28 >>> [16645.528000] [<c0140892>] free_hot_page+0xa/0xc >>> [16645.528000] [<c01408ae>] __free_pages+0x1a/0x25 >>> [16645.528000] [<c014c0bc>] __vunmap+0xa2/0xcb >>> [16645.528000] [<c014c16f>] vfree+0x25/0x27 >>> [16645.528000] [<dfb1e77b>] dvb_dvr_release+0x5b/0xb4 [dvb_core] >>> [16645.528000] [<c0155973>] __fput+0xa9/0x153 >>> [16645.528000] [<c0155a33>] fput+0x16/0x18 >>> [16645.528000] [<c01535cf>] filp_close+0x54/0x5c >>> [16645.528000] [<c0154597>] sys_close+0x57/0x8d >>> [16645.528000] [<c0103b30>] sysenter_past_esp+0x5d/0x81 >>> [16645.528000] ======================= >>> [16645.528000] Code: e0 89 f8 e8 4c 4c 86 e0 83 c4 2c 5b 5e 5f c9 c3 55 89 >>> e5 57 56 53 89 c3 >>> 8b 70 14 0f ba b0 bc 00 00 00 01 8d 46 60 ba 57 0b 8f df <c6> 46 68 03 c7 >>> 46 48 00 00 00 00 >>> e8 21 8d 8c e0 8b 7e 58 80 63 >>> [16645.528000] EIP: [<df8ed1da>] end_unlink_async+0x1b/0xc5 [ehci_hcd] > > For whatever it's worth, the crash occurred in end_async_unlink because > ehci->reclaim was NULL. This may imply that ehci->reclaim_ready was > set when it shouldn't be. Don't ask me how either of these could > have happened. > > Alan Stern >
yes, I noticed that. A racing condition? There's an irq triggered just after ... and end_unlink_async called several times? Possible broken hardware? The mainboard, ibase mb740f, works quite well but I am still missing the firewire connector: lspci 00:00.0 Host bridge: Silicon Integrated Systems [SiS] 741/741GX/M741 Host (rev 03) 00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SiS AGP Port (virtual PCI-to-PCI bridge) 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS964 [MuTIOL Media IO] (rev 36) 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 01) 00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] AC'97 Sound Controller (rev a0) 00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller 00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet (rev 91) 00:05.0 IDE interface: Silicon Integrated Systems [SiS] RAID bus controller 180 SATA/PATA [SiS] (rev 01) 00:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169SC Gigabit Ethernet (rev 10) 00:14.0 Ethernet controller: Atheros Communications, Inc. AR5212 802.11abg NIC (rev 01) 01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 661/741/760/761 PCI/AGP VGA Display Adapter It randomly appears (after a bios "massage") but does not work (It worked one time). Actually I don't remember which irq line it used. chris crash> bt -T PID: 12863 TASK: dbb3d070 CPU: 0 COMMAND: "mythbackend" [c58a9570] memmove at c01b8a3b [c58a9584] ccmp_encap at dfd828b2 [c58a95d4] memmove at c01b8a3b [c58a95e8] ccmp_encap at dfd828b2 [c58a965c] iso_sched_free at df8ecd52 [c58a967c] ath_tx_start at df9acfe3 [c58a9710] iso_sched_free at df8ecd52 [c58a9744] iso_sched_free at df8ecd52 [c58a97fc] usb_hcd_submit_urb at df8a8fcd [c58a9830] usb_hcd_submit_urb at df8a8fcd [c58a9898] dvb_dmxdev_ts_callback at dfb1e4dd [c58a98b4] dvb_dmx_swfilter_packet at dfb1ed1f [c58a98f4] scrup at c02085a0 [c58a9918] lf at c0208627 [c58a9928] vt_console_print at c020bf4c [c58a9944] vt_console_print at c020bd44 [c58a9950] __call_console_drivers at c0117c2b [c58a9968] _call_console_drivers at c0117c95 [c58a9978] release_console_sem at c0117f81 [c58a99b4] vgacon_cursor at c01cd35a [c58a99b8] __call_console_drivers at c0117c2b [c58a99cc] hide_cursor at c0208387 [c58a99d0] vsnprintf at c01b84ac [c58a99d8] vgacon_dummy at c01cc5cc [c58a99e0] vt_console_print at c020bf4c [c58a99fc] vt_console_print at c020bd44 [c58a9a08] __call_console_drivers at c0117c2b [c58a9a20] _call_console_drivers at c0117c95 [c58a9a30] release_console_sem at c0117f81 [c58a9a88] vsnprintf at c01b84ac [c58a9ad4] printk at c0118364 [c58a9ae8] __print_symbol at c01320a6 [c58a9b44] scrup at c02085a0 [c58a9b68] lf at c0208627 [c58a9bc8] qh_destroy at df8f0b57 [c58a9be8] machine_kexec at c01107d0 [c58a9c00] relocate_kernel at c0111000 [c58a9c30] crash_kexec at c01372cc [c58a9c3c] qh_destroy at df8f0b57 [c58a9c60] end_unlink_async at df8ed1da [c58a9c80] die at c0104ef6 [c58a9cc0] do_page_fault at c0113bcf [c58a9cfc] do_page_fault at c011379a [c58a9d04] error_code at c0289cbc [c58a9d10] qh_destroy at df8f0b57 [c58a9d34] end_unlink_async at df8ed1da [c58a9d50] ehci_work at df8ed7d6 [c58a9d68] end_unlink_async at df8ed22a [c58a9d7c] ehci_work at df8ed7d6 [c58a9dc0] ehci_irq at df8f21b5 [c58a9dec] ehci_irq at df8f21b5 [c58a9e18] copy_from_user at c01b91a6 [c58a9e2c] core_sys_select at c015f4ad [c58a9e4c] usb_hcd_irq at df8a83af [c58a9e58] handle_IRQ_event at c013b3e2 [c58a9e70] handle_level_irq at c013c515 [c58a9e80] do_IRQ at c0105f8a [c58a9e84] handle_IRQ_event at c013b3e2 [c58a9ea4] common_interrupt at c010453f [c58a9ed4] free_hot_cold_page at c0140853 [c58a9f00] free_hot_page at c0140892 [c58a9f08] __free_pages at c01408ae [c58a9f10] __vunmap at c014c0bc [c58a9f34] vfree at c014c16f [c58a9f3c] dvb_dvr_release at dfb1e77b [c58a9f58] __fput at c0155973 [c58a9f80] fput at c0155a33 [c58a9f88] filp_close at c01535cf [c58a9fa0] sys_close at c0154597 [c58a9fb4] sysenter_past_esp at c0103b30 _______________________________________________ Em28xx mailing list [email protected] http://mcentral.de/mailman/listinfo/em28xx
