<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'>Last night, while recording two shows off of HDHR tuners and watching an already recorded<br>show, my backend crashed. The crashed happend right at the end of the the show that I was<br>watching (but this could have been just a coincidence.<br>Looking at the log, the crash might have happened at the end of a recording. This is what the<br>message log had to say about the crash:<br><br>Oct 8 00:15:20 mythtv kernel: mythbackend[2519]: segfault at 0 ip 0000003cca847dc6 sp 00007fff57259f88 error 6 in libqt-mt.so.3.3.8[3cca200000+884000]<br><br>Interestingly, 7 hours earlier there was a kernel backtrace in the log:<br><br>Oct 7 17:31:23 mythtv kernel: ------------[ cut here ]------------<br>Oct 7 17:31:23 mythtv kernel: kernel BUG at fs/buffer.c:3258!<br>Oct 7 17:31:23 mythtv kernel: invalid opcode: 0000 [1] SMP <br>Oct 7 17:31:23 mythtv kernel: CPU 0 <br>Oct 7 17:31:23 mythtv kernel: Modules linked in: fuse autofs4 sunrpc ipv6 tuner_simple tuner_types msp3400 saa7115 tuner snd_intel8x0 snd_ac97_codec ac97_bus snd<br>_seq_dummy ivtv snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device compat_ioctl32 snd_pcm_oss videodev nvidia(P) snd_mixer_oss snd_pcm v4l1_compat i2c_algo_bit<br> cx2341x v4l2_common k8temp firewire_ohci hwmon snd_timer i2c_nforce2 firewire_core crc_itu_t snd soundcore sata_nv floppy ppdev forcedeth tveeprom i2c_core snd_p<br>age_alloc pcspkr shpchp lirc_mceusb lirc_dev parport_pc serio_raw parport joydev ata_generic pata_acpi pata_amd [last unloaded: scsi_wait_scan]<br>Oct 7 17:31:23 mythtv kernel: Pid: 266, comm: kswapd0 Tainted: P 2.6.27.30-170.2.82.fc10.x86_64 #1 MS-7125<br>Oct 7 17:31:23 mythtv kernel: RIP: 0010:[<ffffffff810e16ea>] [<ffffffff810e16ea>] free_buffer_head+0x11/0x3e<br>Oct 7 17:31:23 mythtv kernel: RSP: 0000:ffff88007d4039e0 EFLAGS: 00010206<br>Oct 7 17:31:23 mythtv kernel: RAX: ffff8800311b63c8 RBX: ffff8800311b6380 RCX: ffffe20000745350<br>Oct 7 17:31:23 mythtv kernel: RDX: ffff8800311b6380 RSI: 0000000000001000 RDI: ffff8800311b6380<br>Oct 7 17:31:23 mythtv kernel: RBP: ffff88007d4039e0 R08: 0000000000000001 R09: 0000000000000000<br>Oct 7 17:31:23 mythtv kernel: R10: ffff88007d403a00 R11: ffffffff810e16fd R12: 0000000000000001<br>Oct 7 17:31:23 mythtv kernel: R13: ffff8800194cdcd8 R14: ffff880074fc5400 R15: 00000000000000d0<br>Oct 7 17:31:23 mythtv kernel: FS: 00007f85f2179790(0000) GS:ffffffff81719000(0000) knlGS:0000000000000000<br>Oct 7 17:31:23 mythtv kernel: CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b<br>Oct 7 17:31:23 mythtv kernel: CR2: 0000000001633000 CR3: 000000006ac7e000 CR4: 00000000000006e0<br>Oct 7 17:31:23 mythtv kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000<br>Oct 7 17:31:23 mythtv kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400<br>Oct 7 17:31:23 mythtv kernel: Process kswapd0 (pid: 266, threadinfo ffff88007d402000, task ffff88007ddc4530)<br>Oct 7 17:31:23 mythtv kernel: Stack: ffff88007d403a20 ffffffff810e1b0c ffff88000aa2ad20 ffff88000000000a<br>Oct 7 17:31:23 mythtv kernel: ffff8800311b6380 ffff8800311b6380 ffff880074fc5400 ffffe20000745350<br>Oct 7 17:31:23 mythtv kernel: ffff88007d403a80 ffffffff81123222 ffff88007d403a70 ffff8800311b6380<br>Oct 7 17:31:23 mythtv kernel: Call Trace:<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff810e1b0c>] try_to_free_buffers+0x9f/0xb6<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff81123222>] journal_try_to_free_buffers+0x14b/0x1ae<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff810935d6>] ? free_pages_check+0x82/0x8a<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff81114c70>] ext3_releasepage+0x72/0x7f<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff8108e339>] try_to_release_page+0x57/0x6d<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff810998d0>] shrink_page_list+0x4d9/0x61b<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff81099bfa>] shrink_inactive_list+0x1bf/0x473<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff81099f8a>] shrink_zone+0xdc/0xff<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff8109a901>] kswapd+0x3fe/0x580<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff8109929e>] ? isolate_pages_global+0x0/0x34<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff810554e9>] ? autoremove_wake_function+0x0/0x38<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff8109a503>] ? kswapd+0x0/0x580<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff810551a3>] kthread+0x49/0x76<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff81011719>] child_rip+0xa/0x11<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff81010a37>] ? restore_args+0x0/0x30<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff8105515a>] ? kthread+0x0/0x76<br>Oct 7 17:31:23 mythtv kernel: [<ffffffff8101170f>] ? child_rip+0x0/0x11<br>Oct 7 17:31:23 mythtv kernel:<br>Oct 7 17:31:23 mythtv kernel:<br>Oct 7 17:31:23 mythtv kernel: Code: 89 c7 7e d7 31 c0 3b 1d 4d e9 6e 00 0f 9f c0 89 05 2c e9 6e 00 5b 41 5c c9 c3 55 48 8d 47 48 48 39 47 48 48 89 fa 48 89 e5 74<br> 04 <0f> 0b eb fe 48 8b 3d 1b e9 6e 00 48 89 d6 e8 2d 96 fd ff 65 48 <br>Oct 7 17:31:23 mythtv kernel: RIP [<ffffffff810e16ea>] free_buffer_head+0x11/0x3e<br>Oct 7 17:31:23 mythtv kernel: RSP <ffff88007d4039e0><br>Oct 7 17:31:23 mythtv kernel: ---[ end trace 3a87365f960b6996 ]---<br><br>and before this, there were a lot of message like this in the log:<br><br>Oct 7 16:50:42 mythtv kernel: ivtv0: Cause: the application is not reading fast enough.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: All encoder MPG stream buffers are full. Dropping data.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: Cause: the application is not reading fast enough.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: All encoder MPG stream buffers are full. Dropping data.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: Cause: the application is not reading fast enough.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: All encoder MPG stream buffers are full. Dropping data.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: Cause: the application is not reading fast enough.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: All encoder MPG stream buffers are full. Dropping data.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: Cause: the application is not reading fast enough.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: All encoder MPG stream buffers are full. Dropping data.<br>Oct 7 16:50:43 mythtv kernel: ivtv0: Cause: the application is not reading fast enough.<br><br><br>I did not find anything related to this while searching the mailing list, so I wanted to post this in case<br>it is something new or somebody else has seen it before.<br>I am using MythDora 10.21 with kernel 2.6.27.30-170.2.82.fc10.x86_64 and latest mythtv packages.<br></div></body></html>