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SubjectRe: Suspend to memory is freezing my machine
Jacek Luczak wrote:
> Jacek Luczak pisze:
>> Robert Hancock pisze:
>>> Jacek Luczak wrote:
>>>> Robert Hancock pisze:
>>>>> Jacek Luczak wrote:
>>>>>> Rafael J. Wysocki pisze:
>>>>>>> On Sunday, 4 of May 2008, Zdenek Kabelac wrote:
>>>>>>>> Hello
>>>>>>> Hi,
>>>>>>>
>>>>>>>> With recent 2.6.25 & 2.6.26-rc1 git (around 1 week) I get
>>>>>>>> occasionally
>>>>>>>> complete freeze of my T61 during suspend. (dual core, 2GB).
>>>>>>> How reproducible is this?
>>>>>>>
>>>>>>>> I'm running kernel with no_console_suspend - but all I can see is
>>>>>>>> blinking cursor on an empty screen - thus even when I run kernel with
>>>>>>>> most debug options turned on, I can't pass more details so far. I
>>>>>>>> run
>>>>>>>> suspend with with SD card in - so maybe some update in the MMC driver
>>>>>>>> might be responsible for this ?
>>>>>>>>
>>>>>>>> Also - I think that option no_console_suspend doens't work
>>>>>>>> correctly -
>>>>>>>> as many times with suspend I do not see any log message on my console
>>>>>>>> screen. However sometimes the log is shown.
>>>>>>> It would be helpful if you could verify if:
>>>>>>>
>>>>>>> (1) The problem occurs without no_console_suspend.
>>>>>>> (2) The problem occurs without the SD card.
>>>>>>>
>>>>>> Hi Rafael,
>>>>>>
>>>>>> same problem here, although I was able to resume system (it's
>>>>>> basically Intel
>>>>>> machine) , but it was unusable - I was able to switch between
>>>>>> terminals and see
>>>>>> output from kernel. So there was:
>>>>>> - Disabling irq #19;
>>>>>> - some kind of lock spinning on disk:
>>>>>> IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA
>>>>>> Storage
>>>>>> Controller IDE (rev 02)
>>>>>> but I can't provide more output of that lock now - no sign in logs.
>>>>>>
>>>>>> I've made some successful suspend/resume all without sound card active
>>>>>> without
>>>>>> problem. Those appear with sound card active, but I must take closer
>>>>>> look - will
>>>>>> send info later.
>>>>> Can you post your dmesg and /proc/interrupts output from normal bootup ?
>>>> Sure I can ;)
>>>>
>>>> 1) /proc/interrupts
>>>>
>>>> CPU0 CPU1
>>>> 0: 11846981 0 IO-APIC-edge timer
>>>> 1: 30098 0 IO-APIC-edge i8042
>>>> 8: 3 0 IO-APIC-edge rtc
>>>> 9: 13 0 IO-APIC-fasteoi acpi
>>>> 12: 1776540 0 IO-APIC-edge i8042
>>>> 14: 39 0 IO-APIC-edge ata_piix
>>>> 15: 0 0 IO-APIC-edge ata_piix
>>>> 16: 54570 44642 IO-APIC-fasteoi i915@pci:0000:00:02.0
>>>> 17: 0 0 IO-APIC-fasteoi uhci_hcd:usb3
>>>> 18: 0 0 IO-APIC-fasteoi uhci_hcd:usb4
>>>> 19: 98243 0 IO-APIC-fasteoi ata_piix, uhci_hcd:usb5
>>>> 21: 1650574 0 IO-APIC-fasteoi HDA Intel
>>>> 23: 0 0 IO-APIC-fasteoi ehci_hcd:usb1,
>>>> uhci_hcd:usb2
>>>> 220: 14263 0 PCI-MSI-edge iwl3945
>>>> 221: 1166041 1333296 PCI-MSI-edge eth0
>>>> NMI: 0 0 Non-maskable interrupts
>>>> LOC: 1104887 7534969 Local timer interrupts
>>>> RES: 633378 701351 Rescheduling interrupts
>>>> CAL: 16 28315 function call interrupts
>>>> TLB: 1721 2620 TLB shootdowns
>>>> TRM: 0 0 Thermal event interrupts
>>>> SPU: 0 0 Spurious interrupts
>>>> ERR: 0
>>>> MIS: 0
>>>>
>>>> 2) dmesg can here -> http://212.109.128.251/~difrost/linux-next/dmesg.log
>>>> 3) Kernel:
>>>> Linux difrost 2.6.25-07422-gb66e1f1-dirty #14 SMP Fri May 2 22:04:17
>>>> CEST 2008
>>>> i686 i686 i386 GNU/Linux
>>>> It's marked dirty because due to http://lkml.org/lkml/2008/5/2/405
>>>> patch applied.
>>>>
>>>> -Jacek
>>>>
>>> Well, if IRQ 19 got disabled, that's your SATA controller, so resume
>>> likely isn't going to work. Could be a libata problem? CCing linux-ide.
>> Yep, I know, that's why I pointed that out. Irq was disabled somehow in suspend
>> or resume process.
>>
>>> BTW, if your BIOS offers an option to enable AHCI on your SATA
>>> controller then that would be a more optimal configuration (could get
>>> NCQ support), but that is an aside.
>> With AHCI I've got pretty bad timings (and I don't really know why!):
>>
>> [root|20:49|~]$ cat sda_ahci_t
>>
>> /dev/sda:
>> Timing cached reads: 1560 MB in 2.00 seconds = 780.51 MB/sec
>> Timing buffered disk reads: 102 MB in 3.02 seconds = 33.74 MB/sec
>> [root|20:49|~]$ cat sda_piix_t
>>
>> /dev/sda:
>> Timing cached reads: 1544 MB in 2.00 seconds = 772.35 MB/sec
>> Timing buffered disk reads: 134 MB in 3.04 seconds = 44.05 MB/sec
>
> Here's the latest report (all on latest git):
> 1) I've switched to AHCI mode and suspend/resume works OK (because SATA
> controller irq is not disabled).
>
> 2) now /proc/interrupts look like that:
> CPU0 CPU1
> 0: 110708 0 IO-APIC-edge timer
> 1: 4008 0 IO-APIC-edge i8042
> 8: 3 0 IO-APIC-edge rtc
> 9: 15091 0 IO-APIC-fasteoi acpi
> 12: 77467 0 IO-APIC-edge i8042
> 14: 44 0 IO-APIC-edge ata_piix
> 15: 0 0 IO-APIC-edge ata_piix
> 16: 0 0 IO-APIC-fasteoi i915@pci:0000:00:02.0
> 17: 0 0 IO-APIC-fasteoi uhci_hcd:usb3
> 18: 0 0 IO-APIC-fasteoi uhci_hcd:usb4
> 19: 100001 0 IO-APIC-fasteoi uhci_hcd:usb5
> 21: 282 0 IO-APIC-fasteoi HDA Intel
> 23: 1 0 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
> 219: 858 0 PCI-MSI-edge iwl3945
> 220: 8616 0 PCI-MSI-edge eth0
> 221: 6423 0 PCI-MSI-edge ahci
> NMI: 0 0 Non-maskable interrupts
> LOC: 15777 64510 Local timer interrupts
> RES: 9045 24560 Rescheduling interrupts
> CAL: 30 28255 function call interrupts
> TLB: 341 145 TLB shootdowns
> TRM: 0 0 Thermal event interrupts
> SPU: 0 0 Spurious interrupts
> ERR: 0
> MIS: 0
>
> 3) The IRQ #19 remains disabled after resume and produce:
> irq 19: nobody cared (try booting with the "irqpoll" option)
> Pid: 13, comm: kacpi_notify Not tainted 2.6.26-rc1-07561-gafa26be-dirty #16
> [<c013ea27>] __report_bad_irq+0x24/0x69
> [<c013ea2e>] __report_bad_irq+0x2b/0x69
> [<c013ec25>] note_interrupt+0x1b9/0x210
> [<c013e36c>] handle_IRQ_event+0x1a/0x3f
> [<c013f195>] handle_fasteoi_irq+0x84/0xa2
> [<c0104fde>] do_IRQ+0x4f/0x65
> [<c01034ff>] common_interrupt+0x23/0x28
> [<c013007b>] timekeeping_resume+0x9b/0x127
> [<c020b090>] acpi_os_read_port+0x29/0x44
> [<c02177c9>] acpi_hw_register_read+0x61/0x119
> [<c020f76e>] acpi_ev_fixed_event_detect+0x2a/0xa0
> [<c021001a>] acpi_ev_sci_xrupt_handler+0x9/0x17
> [<c020b053>] acpi_irq+0xb/0x1f
> [<c013e36c>] handle_IRQ_event+0x1a/0x3f
> [<c013f181>] handle_fasteoi_irq+0x70/0xa2
> [<c0104fde>] do_IRQ+0x4f/0x65
> [<c020b623>] acpi_os_execute_deferred+0x0/0x25
> [<c01034ff>] common_interrupt+0x23/0x28
> [<c020b623>] acpi_os_execute_deferred+0x0/0x25
> [<c020b0b8>] acpi_os_write_port+0xd/0x2c
> [<c020b640>] acpi_os_execute_deferred+0x1d/0x25
> [<c01290fa>] run_workqueue+0x69/0xda
> [<c0129221>] worker_thread+0xb6/0xc2
> [<c012bca6>] autoremove_wake_function+0x0/0x2d
> [<c012916b>] worker_thread+0x0/0xc2
> [<c012ba42>] kthread+0x38/0x5d
> [<c012ba0a>] kthread+0x0/0x5d
> [<c010370f>] kernel_thread_helper+0x7/0x10
> =======================
> handlers:
> [<c027d100>] (usb_hcd_irq+0x0/0x53)
> Disabling IRQ #19

Hmm, so either it's the SATA controller still generating that IRQ even
when it's in AHCI mode, or else it's USB that's the real problem..

>
> This might happen due to "ACPI: EC: GPE storm detected, disabling EC GPE", but
> here it should revert to polling mode (which is done during boot, but not during
> resume). I'm not expert here.

That does seem unusual, but it doesn't seem directly related (ACPI is on
IRQ9).

>
> Full dmesg here -> http://212.109.128.251/~difrost/linux-next/dmesg_ahci.log
>
> -Jacek
>
> PS: Site note: Why there's such big difference on hdparm timings with PATA and
> AHCI mode?

You can narrow that down by doing this with AHCI in use:

echo 1 > /sys/block/sda/device/queue_depth

which will disable NCQ but keep AHCI. If that brings the performance
back up, then quite likely your drive's NCQ implementation isn't really
optimized for sequential reads..


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