Message-Id: <1169436221.2190.13.camel@nigel.suspend2.net>
Date:	Mon, 22 Jan 2007 14:23:41 +1100
From:	Nigel Cunningham <nigel@...el.suspend2.net>
To:	Jean-Marc Valin <jean-marc.valin@...erbrooke.ca>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Suspend to RAM generates oops and general protection fault

Hi.

On Mon, 2007-01-22 at 13:34 +1100, Jean-Marc Valin wrote:
> Hi,
> 
> 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
> 
> This happens when I'm running 2.6.20-rc5. The previous kernel version I
> was using is 2.6.19-rc6 and was much more broken (second attempt
> *always* failed), so it's probably not a regression.

A second attempt always failing usually indicates that a driver was
dazed and confused after the first cycle and properly killed by the
second attempt, usually because of a lack of [proper] power management
code.

Between any two versions, some things can be fixed, some things can be
broken and some things can become broken in different ways, so your
different experience with 2.6.20-rc5 doesn't necessarily mean that this
is a different issue.

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.

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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