On Sat, Sep 22, 2007 at 09:22:36PM -0700, Andrew Morton wrote: > On Sun, 23 Sep 2007 09:42:14 +0800 Fengguang Wu <[EMAIL PROTECTED]> wrote: > > > On Tue, Sep 18, 2007 at 01:18:41AM -0700, Andrew Morton wrote: > > > > > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc6/2.6.23-rc6-mm1/ > > > > > > 2.6.23-rc6-mm1 is a 29MB diff against 2.6.23-rc6. > > > > > > This bug appears in 2.6.23-rc3-mm1, too. > > hm, there isn't much info here. > > > The message: > > > > [ 3267.844826] NMI Watchdog detected LOCKUP on CPU 0 > > [ 3267.849515] CPU 0 > > [ 3267.851525] Modules linked in: binfmt_misc ipt_MASQUERADE iptable_mangle > > iptable_nat nf_conntrack_ipv4 iptable_filter ip_tables x_tables nf_nat_tftp > > nf_nat_ftp nf_nat nf_conntrack_tftp nf_conntrack_ftp nf_conntrack nfnetlink > > fan ac battery ipv6 eeprom lm85 hwmon_vid i2c_core tun fuse kvm > > snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd sg soundcore > > snd_page_alloc thermal sr_mod pcspkr evdev button processor cdrom > > [ 3267.889547] Pid: 13507, comm: gcc Not tainted 2.6.23-rc6-mm1 #4 > > [ 3267.895442] RIP: 0033:[<00002ab84e34cd44>] [<00002ab84e34cd44>] > > [ 3267.901438] RSP: 002b:00007fff5c9e03f8 EFLAGS: 00000287 > > [ 3267.906726] RAX: 0000000000000000 RBX: 00007fff5c9e0580 RCX: > > 0000000000000000 > > [ 3267.913833] RDX: 0000000000000013 RSI: 00007fff5c9e0680 RDI: > > 00000000012a7010 > > [ 3267.920939] RBP: 00007fff5c9e0550 R08: 0000000000000050 R09: > > 0000000000000000 > > [ 3267.928045] R10: 0000000000000000 R11: 00000000012a7410 R12: > > 0000000000000002 > > [ 3267.935151] R13: 0000000000000003 R14: 0000000000000005 R15: > > 000000000000001f > > [ 3267.942258] FS: 00002ab84f144170(0000) GS:ffffffff814f3000(0000) > > knlGS:0000000000000000 > > [ 3267.950317] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [ 3267.956038] CR2: 00002ab84e3a7430 CR3: 000000000d618000 CR4: > > 00000000000006e0 > > [ 3267.963144] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > 0000000000000000 > > [ 3267.970250] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > > 0000000000000400 > > [ 3267.977357] Process gcc (pid: 13507, threadinfo ffff81000ebe6000, task > > ffff810008b849d0) > > [ 3267.985416] > > [ 3267.997480] Unable to handle kernel paging request at 00000000fffffffe > > RIP: > > [ 3268.002082] [<00000000fffffffe>] > > [ 3268.007827] PGD ea85067 PUD 0 > > Looks like it oopsed in the middle of handling an NMI watchdog expiry, > perhaps. > > > [ 3268.010887] Oops: 0010 [1] SMP > > [ 3268.014035] last sysfs file: > > /devices/pci0000:00/0000:00:1e.0/0000:05:04.0/resource > > [ 3268.021662] CPU 0 > > [ 3268.023674] Modules linked in: binfmt_misc ipt_MASQUERADE iptable_mangle > > iptable_nat nf_conntrack_ipv4 iptable_filter ip_tables x_tables nf_nat_tftp > > nf_nat_ftp nf_nat nf_conntrack_tftp nf_conntrack_ftp nf_conntrack nfnetlink > > fan ac battery ipv6 eeprom lm85 hwmon_vid i2c_core tun fuse kvm > > snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd sg soundcore > > snd_page_alloc thermal sr_mod pcspkr evdev button processor cdrom > > [ 3268.061688] Pid: 13507, comm: gcc Not tainted 2.6.23-rc6-mm1 #4 > > [ 3268.067584] RIP: 0010:[<00000000fffffffe>] [<00000000fffffffe>] > > [ 3268.073578] RSP: 0000:ffffffff8157ce38 EFLAGS: 00010296 > > [ 3268.078867] RAX: 0000000000002710 RBX: ffff810009787050 RCX: > > ffff8100036788e0 > > [ 3268.085973] RDX: 000000000000018d RSI: ffffffff810ba000 RDI: > > ffff810009787080 > > [ 3268.093080] RBP: 0000000000000000 R08: 0000000000000000 R09: > > 0000000000000000 > > [ 3268.100185] R10: 0000000000000000 R11: 0000000000000001 R12: > > ffff810008b849d0 > > [ 3268.107293] R13: ffff810008b850d0 R14: 0000000000000001 R15: > > ffffffff8157cf58 > > [ 3268.114399] FS: 00002ab84f144170(0000) GS:ffffffff814f3000(0000) > > knlGS:0000000000000000 > > [ 3268.122455] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > > [ 3268.128178] CR2: 00000000fffffffe CR3: 0000000006bfd000 CR4: > > 00000000000006e0 > > [ 3268.135283] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > 0000000000000000 > > [ 3268.142388] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > > 0000000000000400 > > [ 3268.149495] Process gcc (pid: 13507, threadinfo ffff81000ebe6000, task > > ffff810008b849d0) > > [ 3268.157552] last branch before last exception/interrupt > > [ 3268.162753] from [<ffffffff811b1843>] serial_in+0x23/0x80 > > [ 3268.168316] to [<ffffffff811b1832>] serial_in+0x12/0x80 > > That's interensting. serial_in(). We have had NMI watchdog expiries when > the kernel is printing a large amount of stuff out a slow serial port with > interrutps disabled. But I thought we'd pretty much plugged those problems > by sprinkling touch_nmi_watchdog() in various places. > > Do you think this is what was happening on your system?
Very likely. I'm running linux with cmdline "root=/dev/sda1 ro nmi_watchdog=1 console=ttyS0,115200 console=tty0", and doing a lot of printks at the time ;-) Thank you, Fengguang - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
