On Thursday, March 14, 2013 01:06:04 PM Peter Hurley wrote:
> On Thu, 2013-03-14 at 17:46 +0100, Rafael J. Wysocki wrote:
> > On Thursday, March 14, 2013 05:09:59 PM Jiri Kosina wrote:
> > > On Thu, 14 Mar 2013, Jiri Kosina wrote:
> > >
> > > > > > I don't think I have seen this message on rc1+ (8343bce, to be precise),
> > > > > > but I have definitely seen sluggish system response on that kernel as
> > > > > > well.
> > > > > >
> > > > > > Attaching lspci, /proc/interrupts and dmesg.
> > > > >
> > > > > Can you try to do a git bisect for this? Is the sluggish system
> > > > > response clear enough that you can tell reliably when it is present and
> > > > > when it isn't?
> > > >
> > > > That was my first thought, but unfortunately I am afraid there will be
> > > > point at which I will easily make a bisection mistake, as the
> > > > responsiveness of the system varies over time, so it's not really a
> > > > 100% objective measure.
> > >
> > > So I will try a bisect, but it'll take some time so that I could claim it
> > > to be trustworthy.
> > >
> > > Therefore in case anyone has any idea in parallel, I am all ears.
> >
> > This one is a candidate to focus on I think:
> >
> > commit 181380b702eee1a9aca51354d7b87c7b08541fcf
> > Author: Yinghai Lu <yinghai@xxxxxxxxxx>
> > Date: Sat Feb 16 11:58:34 2013 -0700
> >
> > PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers
>
> This patch __fixed__ this problem for me in linux-next back in February.
>
> Rafael, did you hold back some ACPI patches from 3.9 that would have
> made fix no longer applicable?
No, I didn't.
I'm afraid, though, that the fix might not be effective on some systems for a
reason that's unclear at the moment.
So in fact the one to check is commit 4f535093cf ("PCI: Put pci_dev in device
tree as early as possible") and if the problem doesn't appear before that, we
need to figure out why the fix may not be sufficient.
Thanks,
Rafael
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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