linux-kernel - Re: [ANNOUNCE] 3.8.4-rt2

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Date:	Thu, 25 Apr 2013 17:09:12 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Clark Williams <williams@...hat.com>
CC:	Paul Gortmaker <paul.gortmaker@...driver.com>,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [ANNOUNCE] 3.8.4-rt2

On 04/08/2013 10:25 PM, Clark Williams wrote:
> BTW I imported -rt onto v3.8.6 with no hiccups from 'git
> quiltimport' other than what you just fixed. Not much runtime on it
> but it booted without complaint and ran just fine until I tried a
> suspend/resume.
> 
> Resume seems to be borken on all the 3.8-rt kernels so far.

I just tested in qemu:
- suspend to mem
  the kvm support gives a few warn ons due to sleeping spinlocks in
  apf_task_wake_all(). Without it, it works just fine.

- suspend to disk
  I see very often "NOHZ: local_softirq_pending" warnings. It looks
  like the softirq thread is going down and the timer softirq isn't
  handled for instance. Apart from this warning I see the going into
  suspend and waking up.

> 
> Clark

Sebastian
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