>> I just encountered the following oops and general protection fault
>> trying to suspend/resume my laptop. I've got a Dell D820 laptop with a 2
>> GHz Core 2 Duo CPU. It usually suspends/resumes fine but not always. The
>> relevant errors are below but the full dmesg log is at
>> http://people.xiph.org/~jm/suspend_resume_oops.txt and my config is in
>> http://people.xiph.org/~jm/config-2.6.20-rc5.txt
...
> It looks like something is stomping on memory it shouldn't be touching,
> so I would suggest testing multiple cycles with a minimal (preferably
> zero) number of modules loaded. If that looks good and reliable, add
> modules & processes until you can say 'If I do X, it breaks.'. If having
> a minimal number of modules loaded doesn't help, I would then suggest
> reviewing your kernel config to see if other things can be built as
> modules and the same logic applied. You can be reasonably sure that it
> will be a device driver. Common causes of suspend/resume problems from
> the list you give below are acpi modules, bluetooth and usb. I'd also be
> consider pcmcia, drm and fuse possibilities. But again, go for unloading
> everything possible in the first instance.
Actually, the reason I sent this is that when I showed the oops/gpf to
Matthew Garrett at linux.conf.au, he said it looked like a CPU hotplug
problem and suggested I send it to lkml. BTW, with 2.6.20-rc5, the
suspend to RAM now works ~95% of the time.
Jean-Marc
> Regards,
>
> Nigel
>
>> Cheers,
>>
>> Jean-Marc
>>
>> P.S. This is the same laptop I had at LCA for which Linus told me to
>> disable preemption and try the newest rc version.
>>
>> [10746.449071] Unable to handle kernel NULL pointer dereference at
>> 0000000000000038 RIP:
>> [10746.449080] [<ffffffff8022b9c8>] iput+0x18/0x80
>> [10746.449092] PGD 3a607067 PUD 27b20067 PMD 0
>> [10746.449099] Oops: 0000 [1] SMP
>> [10746.449104] CPU 0
>> [10746.449107] Modules linked in: psmouse battery ac thermal fan button
>> ipw3945 ieee80211 tg3 arc4 ecb blkcipher ieee80211_crypt_wep
>> ieee80211_crypt binfmt_misc rfcomm l2cap bluetooth i915 drm
>> speedstep_centrino cpufreq_userspace cpufreq_powersave cpufreq_ondemand
>> cpufreq_stats freq_table cpufreq_conservative video sbs i2c_ec dock
>> asus_acpi backlight container ipv6 fuse sbp2 af_packet parport_pc lp
>> parport sg sr_mod cdrom snd_hda_intel snd_hda_codec tsdev snd_pcm_oss
>> snd_mixer_oss pcmcia snd_pcm snd_timer ata_generic snd shpchp
>> pci_hotplug soundcore snd_page_alloc serio_raw yenta_socket
>> rsrc_nonstatic pcmcia_core pcspkr evdev ext3 jbd mbcache ohci1394
>> ehci_hcd ieee1394 ide_generic uhci_hcd usbcore generic sd_mod processor
>> [10746.449190] Pid: 218, comm: kswapd0 Not tainted 2.6.20-rc5-x86-64 #1
>> [10746.449196] RIP: 0010:[<ffffffff8022b9c8>] [<ffffffff8022b9c8>]
>> iput+0x18/0x80
>> [10746.449206] RSP: 0000:ffff810037f2dd50 EFLAGS: 00010283
>> [10746.449212] RAX: 0000000000000000 RBX: ffff81000003fcf0 RCX:
>> ffff81000003fd20
>> [10746.449219] RDX: 0000000000000001 RSI: 0000000000000286 RDI:
>> ffff81000003fcf0
>> [10746.449225] RBP: 0000000000000042 R08: 0000000000000000 R09:
>> 0000000000000000
>> [10746.449232] R10: 28f5c28f5c28f5c3 R11: ffffffff8023ae90 R12:
>> 0000000000000000
>> [10746.449239] R13: ffff810075721c70 R14: ffffffff805fa940 R15:
>> 0000000000000000
>> [10746.449246] FS: 0000000000000000(0000) GS:ffffffff8058e000(0000)
>> knlGS:0000000000000000
>> [10746.449253] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
>> [10746.449259] CR2: 0000000000000038 CR3: 000000001207f000 CR4:
>> 00000000000006e0
>> [10746.449265] Process kswapd0 (pid: 218, threadinfo ffff810037f2c000,
>> task ffff810037a1b760)
>> [10746.449269] Stack: ffff8100001ce2f0 ffffffff802ddaf8
>> ffff8100001ce3c0 ffff8100001ce2f0
>> [10746.449280] 0000000000000042 ffffffff8022f645 ffff810037f2dd80
>> 000000000001cb60
>> [10746.449288] 0000000000000090 ffff81007daa0e00 00000000000000d0
>> ffffffff802ddb49
>> [10746.449296] Call Trace:
>> [10746.449305] [<ffffffff802ddaf8>] prune_one_dentry+0x68/0xa0
>> [10746.449314] [<ffffffff8022f645>] prune_dcache+0x145/0x1e0
>> [10746.449323] [<ffffffff802ddb49>] shrink_dcache_memory+0x19/0x50
>> [10746.449331] [<ffffffff802418a7>] shrink_slab+0x117/0x190
>> [10746.449342] [<ffffffff8025a392>] kswapd+0x382/0x4e0
>> [10746.449356] [<ffffffff802a13b0>] autoremove_wake_function+0x0/0x30
>> [10746.449370] [<ffffffff8025a010>] kswapd+0x0/0x4e0
>> [10746.449376] [<ffffffff802a11d0>] keventd_create_kthread+0x0/0x90
>> [10746.449383] [<ffffffff802335a9>] kthread+0xd9/0x120
>> [10746.449394] [<ffffffff80260ec8>] child_rip+0xa/0x12
>> [10746.449401] [<ffffffff802a11d0>] keventd_create_kthread+0x0/0x90
>> [10746.449414] [<ffffffff802334d0>] kthread+0x0/0x120
>> [10746.449421] [<ffffffff80260ebe>] child_rip+0x0/0x12
>> [10746.449426]
>> [10746.449429]
>> [10746.449430] Code: 48 8b 40 38 75 04 0f 0b eb fe 48 85 c0 74 0b 48 8b
>> 40 28 48
>> [10746.449449] RIP [<ffffffff8022b9c8>] iput+0x18/0x80
>> [10746.449456] RSP <ffff810037f2dd50>
>> [10746.449460] CR2: 0000000000000038
>> [10746.449463] ACPI Exception (pci_bind-0299): AE_NOT_FOUND, Unable to
>> get data from device DCKS [20060707]
>>
>>
>> and later:
>>
>>
>> [ 3.668009] SMP alternatives: switching to SMP code
>> [ 3.668168] Booting processor 1/2 APIC 0x1
>> [ 4.149691] Initializing CPU#1
>> [ 4.229595] Calibrating delay using timer specific routine.. 3990.32
>> BogoMIPS (lpj=7980654)
>> [ 4.229602] CPU: L1 I cache: 32K, L1 D cache: 32K
>> [ 4.229604] CPU: L2 cache: 4096K
>> [ 4.229606] CPU 1/1 -> Node 0
>> [ 4.229608] CPU: Physical Processor ID: 0
>> [ 4.229609] CPU: Processor Core ID: 1
>> [ 4.230107] Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz stepping 06
>> [ 4.233607] CPU 1: Syncing TSC to CPU 0.
>> [ 3.762970] CPU 1: synchronized TSC with CPU 0 (last diff 0 cycles,
>> maxerr 960 cycles)
>> [ 3.764689] general protection fault: 0000 [2] SMP
>> [ 3.764963] CPU 1
>> [ 3.764983] Modules linked in: psmouse battery ac thermal fan button
>> arc4 ecb blkcipher ieee80211_crypt_wep ieee80211_crypt binfmt_misc
>> rfcomm l2cap bluetooth i915 drm speedstep_centrino cpufreq_userspace
>> cpufreq_powersave cpufreq_ondemand cpufreq_stats freq_table
>> cpufreq_conservative video sbs i2c_ec dock asus_acpi backlight container
>> ipv6 fuse sbp2 af_packet parport_pc lp parport sg sr_mod cdrom
>> snd_hda_intel snd_hda_codec tsdev snd_pcm_oss snd_mixer_oss pcmcia
>> snd_pcm snd_timer ata_generic snd shpchp pci_hotplug soundcore
>> snd_page_alloc serio_raw yenta_socket rsrc_nonstatic pcmcia_core pcspkr
>> evdev ext3 jbd mbcache ohci1394 ehci_hcd ieee1394 ide_generic uhci_hcd
>> usbcore generic sd_mod processor
>> [ 3.765304] Pid: 7824, comm: sleep.sh Not tainted 2.6.20-rc5-x86-64 #1
>> [ 3.765330] RIP: 0010:[<ffffffff80289c45>] [<ffffffff80289c45>]
>> task_rq_lock+0x35/0x90
>> [ 3.765379] RSP: 0018:ffff81001d291d28 EFLAGS: 00010086
>> [ 3.765403] RAX: 6e696c7761726320 RBX: ffffffff805f88a0 RCX:
>> 0000000000000000
>> [ 3.765431] RDX: 0000000000000000 RSI: ffff81001d291db0 RDI:
>> ffff810037a1b760
>> [ 3.765460] RBP: ffff81001d291d48 R08: 0000000000000000 R09:
>> 0000000000000000
>> [ 3.765488] R10: 0000000000000001 R11: 0000000000000000 R12:
>> ffffffff805f88a0
>> [ 3.765516] R13: ffff810037a1b760 R14: ffff81001d291db0 R15:
>> ffff81000a9e3e80
>> [ 3.765546] FS: 00002b1bcd567ae0(0000) GS:ffff810037ad1cc0(0000)
>> knlGS:0000000000000000
>> [ 3.765589] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
>> [ 3.765615] CR2: 0000000000000000 CR3: 000000001d4d0000 CR4:
>> 00000000000006a0
>> [ 3.765645] Process sleep.sh (pid: 7824, threadinfo ffff81001d290000,
>> task ffff8100661cf080)
>> [ 3.765689] Stack: ffff810037a1b760 0000000000000002
>> 0000000000000003 0000000000000003
>> [ 3.765739] ffff81001d291dd8 ffffffff8028c454 0000000000000001
>> 0000000000000003
>> [ 3.765786] 0000000000000000 0000000000000002 ffffffff8058e4c0
>> 0000000000000003
>> [ 3.765822] Call Trace:
>> [ 3.765861] [<ffffffff8028c454>] set_cpus_allowed+0x24/0xc0
>> [ 3.765890] [<ffffffff8033cf3b>] kobject_register+0x3b/0x50
>> [ 3.765919] [<ffffffff80292850>] cpu_callback+0x50/0x70
>> [ 3.765949] [<ffffffff80269406>] notifier_call_chain+0x26/0x40
>> [ 3.765980] [<ffffffff802a704c>] _cpu_up+0xbc/0xf0
>> [ 3.766005] [<ffffffff802a70b2>] cpu_up+0x32/0x60
>> [ 3.766030] [<ffffffff802a712b>] enable_nonboot_cpus+0x4b/0xa0
>> [ 3.766057] [<ffffffff802aba8b>] enter_state+0x15b/0x1b0
>> [ 3.766083] [<ffffffff802abb5b>] state_store+0x7b/0xb0
>> [ 3.766112] [<ffffffff80306c09>] sysfs_write_file+0xd9/0x120
>> [ 3.766143] [<ffffffff8021653e>] vfs_write+0xde/0x1a0
>> [ 3.766169] [<ffffffff80217073>] sys_write+0x53/0x90
>> [ 3.766197] [<ffffffff8026011e>] system_call+0x7e/0x83
>> [ 3.766228]
>> [ 3.766247]
>> [ 3.766248] Code: 8b 40 18 48 8b 04 c5 80 f2 59 80 48 03 58 08 48 89
>> df e8 54
>> [ 3.766331] RIP [<ffffffff80289c45>] task_rq_lock+0x35/0x90
>> [ 3.766359] RSP <ffff81001d291d28>
>> [ 3.766650] <6>ata1.00: configured for UDMA/133
>> -
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