Re: rc7 + tip/master suspend fun
From: Thomas Gleixner
Date: Mon Jul 28 2014 - 17:02:24 EST
On Mon, 28 Jul 2014, Rafael J. Wysocki wrote:
> On Monday, July 28, 2014 07:53:26 PM Borislav Petkov wrote:
> > --Nq2Wo0NMKNjxTN9z
> > Content-Type: text/plain; charset=utf-8
> > Content-Disposition: inline
> > Hi guys,
> > so during my rc7 + tip/master testing today, I've hit the second WARN
> > in remove_proc_entry, see attached pic. This happens right before I
> > suspend to disk and I can't successfully suspend because sda gets choked
> > afterwards and floods dmesg with something-has-timeout messages which I
> > can't read - whizzing by too fast.
> > And this seems consistent with the warning because sda1 is behind AHCI
> > for which the warning is for.
> > Oh, and I'm saying it is tip/master-related because plain rc7 is fine.
> > Other strange things I was able to observe in dmesg between plain rc7
> > and rc7+tip/master are that something in the interrupts allocation is
> > different now (plenty of movement in that area recently) leading to the
> > following diffs between dmesg:
> > --- 16-rc7 2014-07-28 19:43:13.000000000 +0200
> > +++ 16-rc7+ 2014-07-28 11:11:24.000000000 +0200
> > @@ -137,11 +138,9 @@ IOAPIC: apic_id 10, version 33, addre
> > ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
> > ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
> > ACPI: IRQ0 used by override.
> > -ACPI: IRQ2 used by override.
> > ACPI: IRQ9 used by override.
> > Using ACPI (MADT) for SMP configuration information
> > smpboot: Allowing 8 CPUs, 0 hotplug CPUs
> > -nr_irqs_gsi: 72
> > PM: Registered nosave memory: [mem 0x0009e000-0x0009efff]
> > PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
> > PM: Registered nosave memory: [mem 0x000a0000-0x000dffff]
> > that gsi thing went away, apparently.
> > -NR_IRQS:4352 nr_irqs:1288 16
> > +NR_IRQS:4352 nr_irqs:1032 0
> > fun.
Right, that's from Jiangs ioapic rework.
> > And then something lead to different interrupts being assigned:
> > -pci 0000:00:00.2: irq 72 for MSI/MSI-X
> > +pci 0000:00:00.2: irq 27 for MSI/MSI-X
> > -ahci 0000:04:00.0: irq 73 for MSI/MSI-X
> > +ahci 0000:04:00.0: irq 29 for MSI/MSI-X
Borislav, can you please upload a full bootlog with "apic=verbose" on
Jiang, can you please have a look?
> > and lookie lookie, it is ahci which changes IRQ lines.
> > Suggestions and ideas how to narrow down are appreciated.
> Please try to revert this patch from Peter:
How is that related to a leaked interrupt handler? That patch gives a
splat at request_irq() time. Completely unrelated to this problem.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/