linux-kernel - Re: [3.9-rc1] very poor interrupt responses

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Date:	Mon, 11 Mar 2013 15:55:27 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Harald Arnesen <skogtun.linux@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [3.9-rc1] very poor interrupt responses

On Monday, March 11, 2013 11:09:33 AM Harald Arnesen wrote:
> Rafael J. Wysocki [2013-03-11 04:38]:
> 
> > On Friday, March 08, 2013 02:12:33 PM Shawn Starr wrote:
> >> Hello folks,
> >>
> >> I am noticing since rc0 and now rc1, very poor interrupt handling. Keyboard response, mouse movements, display refreshing etc. General input/display sluggishness. Did something break IRQ handling somewhere? I need to validate if this happens with X not running also if it is i915 related somehow. The behavor is noticed in a console login however.
> > 
> > Please try to disable the intel_pstate driver by putting intel_pstate=disable
> > into the kernel's command line and see if that helps (you may also try to
> > compile the driver out).
> 
> I see the same problem on my Thinkpad T500, and I have
> X86_INTEL_PSTATE=n in my config.

Can you please open a Bugzilla entry at bugzilla.kernel.org and attach
the output of lspci -vvv, the contents of /proc/interrupts and
a boot dmesg log from the affected machine to it?  Ideally, both from a kernel
that doesn't have the problem and from the affected one.

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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