Rafael J. Wysocki wrote: > On Friday, July 09, 2010, Stephan Diestelhorst wrote: > > I wrote: > > > I have an issue with suspend to RAM and I/O load on a disk. Symptoms > > > are that the disk does not respond to requests when woken up, producing > > > only I/O errors on all tested kernels (newest 2.6.35-rc4 (Ubuntu > > > mainline PPA build)): > > > > > <snip> > > > > > This can be triggered most reliably with multiple "direct" writes to > > > disk, I create the load with the attached script. If the issue is > > > triggered, suspend (through pm-suspend) takes very long. > > > > > IMHO the interesting log output during suspend is: > > > [ 1674.700125] ata1.00: qc timeout (cmd 0xec) > > > > Almighty google suggested to try "pci=nomsi", which seems to have > > cured the issue for me for now. Is that plausible? I'll keep this > > under observation. > > Hmm. How does your /proc/interrupts look like? This has been yet another red herring. After trying out the kernel option three times with two different kernels, it failed yet again with the same symptoms. I have attached /proc/interrupts for 2.6.35-rc4, once with pci=nomsi and once without, but again, I do not think this makes a difference :-/ > Also, do you have a link to this "Google suggestion"? It was some german forum, a guy with completely different HW, but the same symptom. I thought trying out the option wouldn't hurt. Maybe it came for example from http://lkml.org/lkml/2008/12/20/3 originally. Stephan
CPU0 CPU1 0: 54 5915 IO-APIC-edge timer 1: 137 34 IO-APIC-edge i8042 7: 1 0 IO-APIC-edge 8: 0 1 IO-APIC-edge rtc0 9: 20 110 IO-APIC-fasteoi acpi 12: 1 654 IO-APIC-edge i8042 16: 1 276 IO-APIC-fasteoi ohci_hcd:usb3, ohci_hcd:usb4, ath9k, hda_intel 17: 0 0 IO-APIC-fasteoi ehci_hcd:usb1 18: 1 330 IO-APIC-fasteoi ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7 19: 0 21 IO-APIC-fasteoi ehci_hcd:usb2 22: 449 3999 IO-APIC-fasteoi ahci 44: 0 1 PCI-MSI-edge sky2@pci:0000:04:00.0 45: 0 17 PCI-MSI-edge hda_intel NMI: 0 0 Non-maskable interrupts LOC: 3120 689 Local timer interrupts SPU: 0 0 Spurious interrupts PMI: 0 0 Performance monitoring interrupts PND: 0 0 Performance pending work RES: 13688 8555 Rescheduling interrupts CAL: 81 54 Function call interrupts TLB: 250 287 TLB shootdowns TRM: 0 0 Thermal event interrupts THR: 0 0 Threshold APIC interrupts MCE: 0 0 Machine check exceptions MCP: 1 1 Machine check polls ERR: 1 MIS: 0
CPU0 CPU1 0: 73 8241 IO-APIC-edge timer 1: 37 396 IO-APIC-edge i8042 7: 1 0 IO-APIC-edge 8: 0 1 IO-APIC-edge rtc0 9: 1 175 IO-APIC-fasteoi acpi 12: 3030 157 IO-APIC-edge i8042 16: 3 296 IO-APIC-fasteoi ohci_hcd:usb3, ohci_hcd:usb4, hda_intel, ath9k 17: 0 0 IO-APIC-fasteoi ehci_hcd:usb1 18: 1 29 IO-APIC-fasteoi ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7, sky2@pci:0000:04:00.0 19: 0 51 IO-APIC-fasteoi ehci_hcd:usb2, hda_intel 22: 55 7629 IO-APIC-fasteoi ahci NMI: 0 0 Non-maskable interrupts LOC: 4255 738 Local timer interrupts SPU: 0 0 Spurious interrupts PMI: 0 0 Performance monitoring interrupts PND: 0 0 Performance pending work RES: 16044 10388 Rescheduling interrupts CAL: 81 51 Function call interrupts TLB: 325 423 TLB shootdowns TRM: 0 0 Thermal event interrupts THR: 0 0 Threshold APIC interrupts MCE: 0 0 Machine check exceptions MCP: 1 1 Machine check polls ERR: 1 MIS: 0
