Re: Machine crashes right *after* ~successful resume

From: Pavel Machek
Date: Sun Oct 12 2014 - 16:40:43 EST

Bjorn, any ideas?

Would it be feasible to revert 2e8b... to see if it fixes it on 3.17?


On Sun 2014-10-12 16:49:18, Wilmer van der Gaast wrote:
> Hello,
> Many thanks for your response!
> On 12-10-14 15:30, Pavel Machek wrote:
> >
> >Has it ever worked ok? ...aha, in 3.10, ok.
> >
> Correct. And I've tried a few more kernels now, compiled on my own. 3.17
> still has this issue, 3.10 is completely fine all the way up to 3.10.57
> (I've tested just under 50 cycles last night). 3.11 I tried but it seems to
> have other suspend-resume stability issues not present anymore in later
> kernels, I've mostly not used those results.
> git bisect: I've finally succeeded! I've tried automating it completely, but
> sadly Gigabyte couldn't be bothered wiring up the motherboard to make the
> watchdog work. :-(
> The culprit appears to be this one: 2e8b5f621dbe29425906852c6079afb6b28720cb
> Merge: 07f2daa fed2451
> Author: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> Date: Wed Aug 28 20:55:41 2013 -0600
> Merge branch 'pci/misc' into next
> * pci/misc:
> PCI: Remove pcie_cap_has_devctl()
> PCI: Support PCIe Capability Slot registers only for ports with slots
> PCI: Remove PCIe Capability version checks
> PCI: Allow PCIe Capability link-related register access for switches
> PCI: Add offsets of PCIe capability registers
> PCI: Tidy bitmasks and spacing of PCIe capability definitions
> PCI: Remove obsolete comment reference to pci_pcie_cap2()
> PCI: Clarify PCI_EXP_TYPE_PCI_BRIDGE comment
> PCI: Rename PCIe capability definitions to follow convention
> PCI: Disable decoding for BAR sizing only when it was actually enabled
> PCI: Add comment about needing pci_msi_off() even when
> PCI: Add pcibios_pm_ops for optional arch-specific hibernate
> functionality
> I've then tried to narrow down which of the merged changes is my issue but
> with no luck, possibly because there's a problem with a combination of one
> of these changes, and a change that was not in the pci/misc branch at the
> time. I could do a manual test instead.
> >>I've already tried to skip the NVidia + VMware modules at boot time (as you
> >>can see from the logs they're not loaded at any point), but it didn't help.
> >>I could try omitting more modules.
> >Yes, try with minimal modules (and no s2ram) would be nice.
> >
> I've tried unloading a bunch of modules (sound and NIC IIRC), same results.
> I can try this again with an even more minimal set. If this improves the
> situation, I'll post again.
> Wilmer van der Gaast.

(cesky, pictures)
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