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Re: Hibernate resume bug around 3,18-rc2 - Full PAT support

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On 20/11/15 06:25, Vassilis Virvilis wrote:
> On 11/19/2015 10:35 PM, Vassilis Virvilis wrote:
>>
>> I compiled and I am running 4.3 right now.
>>
> 
> It failed this morning. Last night I did 3 hibernate / resume cycles. In
> the last one I I also turned off the PSU (this seems to push it over the
> edge - but it may be random behavior) and it worked. This morning 7h
> later failed to resume - but it didn't hang on _lapic_resume. This time
> it rebooted - and I seem to recall this behavior for 4.2+ kernels. I
> forgot to mention it because my testing with 4.x kernels were one month
> before.
> 
> So 4.3 kernel - reboots on resume after a long hibernation time.
> 
> I am testing with 4.3 and nopat right now.

I've just found a potential issue: In case MTRR is disabled by the BIOS
the PAT register of the boot processor won't be restored after resume.

Can you check whether pr_info("MTRR: Disabled\n") has been executed in
early boot? If yes, this might be a BIOS option.


Juergen




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Thread

Re: Hibernate resume bug around 3,18-rc2 - Full PAT support Juergen Gross <jgross@suse.com> - 2015-11-19 06:40 +0100
  Re: Hibernate resume bug around 3,18-rc2 - Full PAT support vasvir@iit.demokritos.gr - 2015-11-19 09:00 +0100
    Re: Hibernate resume bug around 3,18-rc2 - Full PAT support Juergen Gross <jgross@suse.com> - 2015-11-19 10:20 +0100
      Re: Hibernate resume bug around 3,18-rc2 - Full PAT support Vassilis Virvilis <vasvir@iit.demokritos.gr> - 2015-11-20 06:30 +0100
        Re: Hibernate resume bug around 3,18-rc2 - Full PAT support Juergen Gross <jgross@suse.com> - 2015-11-20 09:50 +0100
          Re: Hibernate resume bug around 3,18-rc2 - Full PAT support vasvir@iit.demokritos.gr - 2015-11-20 11:10 +0100
            Re: Hibernate resume bug around 3,18-rc2 - Full PAT support Juergen Gross <jgross@suse.com> - 2015-11-20 13:30 +0100
              Re: Hibernate resume bug around 3,18-rc2 - Full PAT support Vassilis Virvilis <vasvir@iit.demokritos.gr> - 2015-11-21 13:00 +0100
                Re: Hibernate resume bug around 3,18-rc2 - Full PAT support Juergen Gross <jgross@suse.com> - 2015-11-23 08:40 +0100
                Re: Hibernate resume bug around 3,18-rc2 - Full PAT support Juergen Gross <jgross@suse.com> - 2015-11-23 15:20 +0100
                Re: Hibernate resume bug around 3,18-rc2 - Full PAT support "Luis R. Rodriguez" <mcgrof@suse.com> - 2015-11-24 23:50 +0100
                Re: Hibernate resume bug around 3,18-rc2 - Full PAT support Juergen Gross <jgross@suse.com> - 2015-11-25 06:10 +0100
                Re: Hibernate resume bug around 3,18-rc2 - Full PAT support "Luis R. Rodriguez" <mcgrof@suse.com> - 2015-11-25 20:30 +0100
                Re: Hibernate resume bug around 3,18-rc2 - Full PAT support vasvir@iit.demokritos.gr - 2015-11-23 15:20 +0100
                Re: Hibernate resume bug around 3,18-rc2 - Full PAT support "Luis R. Rodriguez" <mcgrof@suse.com> - 2015-11-23 20:00 +0100
                Re: Hibernate resume bug around 3,18-rc2 - Full PAT support "Luis R. Rodriguez" <mcgrof@suse.com> - 2015-11-24 23:20 +0100
  Re: Hibernate resume bug around 3,18-rc2 - Full PAT support "Luis R. Rodriguez" <mcgrof@suse.com> - 2015-11-23 19:50 +0100
    Re: Hibernate resume bug around 3,18-rc2 - Full PAT support vasvir@iit.demokritos.gr - 2015-11-24 10:40 +0100
      Re: Hibernate resume bug around 3,18-rc2 - Full PAT support "Luis R. Rodriguez" <mcgrof@suse.com> - 2015-11-24 23:10 +0100

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