linux-kernel - Re: intel_idle .. Was: __pm_runtime_resume() returns -1 Was: Regression in 2.6.36

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Date:	Sun, 24 Oct 2010 04:40:24 +0200
From:	Christian Ruediger Bahls <lkml@...52.de>
To:	Len Brown <lenb@...nel.org>, "Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>,
	Len Brown <len.brown@...el.com>
Subject: Re: intel_idle .. Was: __pm_runtime_resume() returns -1 Was:
 Regression in 2.6.36

[2010-10-23 19:49] Len Brown <lenb@...nel.org> wrote:
> 
> > and yes indeed booting with "intel_idle.max_cstate=0"
> > makes the system work again
> 
> Please file a sighting here:
> https://bugzilla.kernel.org/enter_bug.cgi?product=Power%20Management
> component: intel_idle

https://bugzilla.kernel.org/show_bug.cgi?id=21032

[2010-10-23 19:58] Rafael J. Wysocki <rjw@...k.pl> wrote:
> 
> > in later versions of the kernel it throws the 
> >  "__pm_runtime_resume() returns -1"-warnings
> 
> Do you have CONFIG_PM_VERBOSE set in your .config by chance?

Yes i have

[2010-10-23 20:04] Len Brown <lenb@...nel.org> wrote:
> describe symptoms (I think this is a fully reproducible boot hang, yes?)

yes, fully reproducible boot hang
 (hangs "best" with max_cstate=2

> try intel_idle.max_cstate=1, include dmesg
> and increase the '1' until it fails
> My guess is that 1 will work, but some higher number will start failing.

yes, max_cstate=4 works better(like in: hanging less often) than max_cstate=2

> without any other bootparams, try "nolapic_timer"

yes .. this helps .. dmesg's attach to bug report mentioned above

> thanks,
> Len Brown, Intel Open Source Technology Center

Thank you very much as well :)

yours
  Christian

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