[x86_64] soft lockup with sunrpc/nfsd (also DWARF2 unwinder stuck)

[Robin H. Johnson]

The -git head as of today (2.6.19-rc4-git9) has a bug with SunRPC by the looks
of it. 

Motherboard: Intel DG965RY
Core: Intel Core2 Duo E6400
Memory: 2x1GB + 2x256MB

> BUG: soft lockup detected on CPU#0!
> 
> Call Trace:
>  [<ffffffff80266948>] dump_trace+0xaa/0x3ec
>  [<ffffffff80266cc6>] show_trace+0x3c/0x52
>  [<ffffffff80266cf1>] dump_stack+0x15/0x17
>  [<ffffffff802a46a0>] softlockup_tick+0xd5/0xe8
>  [<ffffffff80249b43>] run_local_timers+0x13/0x15
>  [<ffffffff802861f5>] update_process_times+0x4c/0x79
>  [<ffffffff8026e89e>] smp_local_timer_interrupt+0x34/0x54
>  [<ffffffff8026ed85>] smp_apic_timer_interrupt+0x52/0x69
>  [<ffffffff8025acf6>] apic_timer_interrupt+0x66/0x70
> DWARF2 unwinder stuck at apic_timer_interrupt+0x66/0x70
> 
> Leftover inexact backtrace:
> 
>  <IRQ>  <EOI>  [<ffffffff8025fd2a>] _spin_lock+0xb/0x14
>  [<ffffffff8020bd51>] do_path_lookup+0x1b9/0x21c
>  [<ffffffff8813713b>] :sunrpc:auth_domain_lookup+0x9e/0x11d
>  [<ffffffff881378b5>] :sunrpc:unix_domain_find+0x17/0xad
>  [<ffffffff88137b05>] :sunrpc:ip_map_parse+0x106/0x175
>  [<ffffffff8023788d>] debug_mutex_free_waiter+0x52/0x56
>  [<ffffffff8813ab2c>] :sunrpc:cache_write+0x9c/0xd4
>  [<ffffffff80214936>] vfs_write+0xcf/0x175
>  [<ffffffff802152ae>] sys_write+0x47/0x70
>  [<ffffffff8025a11e>] system_call+0x7e/0x83

.config attached

ver_linux:
Linux grubbs-int 2.6.19-rc4 #27 SMP Sat Nov 4 19:03:22 PST 2006 x86_64 Intel(R) Core(TM)2 CPU          6400  @ 2.13GHz GenuineIntel GNU/Linux
 
Gnu C                  4.1.1
Gnu make               3.81
binutils               2.17
util-linux             2.12r
mount                  2.12r
module-init-tools      3.2.2
e2fsprogs              1.39
jfsutils               1.1.11
xfsprogs               2.8.11
quota-tools            3.13.
Linux C Library        > libc.2.5
Dynamic linker (ldd)   2.5
Procps                 3.2.7
Net-tools              1.60
Kbd                    1.12
Sh-utils               6.4
udev                   103
Modules Loaded         e1000 e100 bridge llc ahci libata ipv6 nfsd exportfs rtc raid456 xor ohci1394 mii ieee1394 snd_hda_intel snd_hda_codec parport_pc snd_pcm parport i2c_i801 snd_timer i2c_core snd psmouse soundcore pcspkr snd_page_alloc evdev 3w_xxxx sr_mod cdrom sg sd_mod dm_snapshot xfs nfs nfs_acl lockd sunrpc reiserfs raid10 raid1 raid0 md_mod dm_mirror dm_mod ohci_hcd uhci_hcd usb_storage libusual usbhid ehci_hcd usbcore

-- 
Robin Hugh Johnson
E-Mail     : robbat2@xxxxxxxxxx
GnuPG FP   : 11AC BA4F 4778 E3F6 E4ED  F38E B27B 944E 3488 4E85

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