Question about hibernation on sparc64

Question about hibernation on sparc64

[Kirill Tkhai]

Hello!

I bumped on the fact that there is no hibernation support  on sparc64. It's possible that the process of its porting will become interesting for me in the future, but I'm not exactly sure at the moment.

So I want to ask people who know sparc64 deeply. Are there any architecture limits which make hibernation on v9 impossible? May be anybody has researched this question.

Kirill

Re: Question about hibernation on sparc64

[David Miller]

From: Kirill Tkhai <tkhai@yandex.ru>
Date: Thu, 12 Apr 2012 15:48:35 +0400

> So I want to ask people who know sparc64 deeply. Are there any
> architecture limits which make hibernation on v9 impossible? May be
> anybody has researched this question.

I can't think of any sparc64 hardware which would support hibernation
in any reasonable way, so I'm quite surprised that you plan on
implementing support for it.  Perhaps you can elaborate your plans :-)

Re: Question about hibernation on sparc64

[Alex Buell]

On Thu, 2012-04-12 at 12:32 -0400, David Miller wrote:
> From: Kirill Tkhai <tkhai@yandex.ru>
> Date: Thu, 12 Apr 2012 15:48:35 +0400
> 
> > So I want to ask people who know sparc64 deeply. Are there any
> > architecture limits which make hibernation on v9 impossible? May be
> > anybody has researched this question.
> 
> I can't think of any sparc64 hardware which would support hibernation
> in any reasonable way, so I'm quite surprised that you plan on
> implementing support for it.  Perhaps you can elaborate your plans :-)

http://www.rugged-systems.com/p/mobilesunsolaris/0075.htm is a sparc64
laptop :)
-- 
Tactical Nuclear Kittens

Re: Question about hibernation on sparc64

[David Miller]

From: Alex Buell <alex.buell@munted.eu>
Date: Thu, 12 Apr 2012 19:59:57 +0100

> On Thu, 2012-04-12 at 12:32 -0400, David Miller wrote:
>> From: Kirill Tkhai <tkhai@yandex.ru>
>> Date: Thu, 12 Apr 2012 15:48:35 +0400
>> 
>> > So I want to ask people who know sparc64 deeply. Are there any
>> > architecture limits which make hibernation on v9 impossible? May be
>> > anybody has researched this question.
>> 
>> I can't think of any sparc64 hardware which would support hibernation
>> in any reasonable way, so I'm quite surprised that you plan on
>> implementing support for it.  Perhaps you can elaborate your plans :-)
> 
> http://www.rugged-systems.com/p/mobilesunsolaris/0075.htm is a sparc64
> laptop :)

That's amusing but even that machine (and it's not a laptop, it's
a portable workstation) doesn't support hibernation.

Re: Question about hibernation on sparc64

[Sam Ravnborg]

On Thu, Apr 12, 2012 at 07:59:57PM +0100, Alex Buell wrote:
> On Thu, 2012-04-12 at 12:32 -0400, David Miller wrote:
> > From: Kirill Tkhai <tkhai@yandex.ru>
> > Date: Thu, 12 Apr 2012 15:48:35 +0400
> > 
> > > So I want to ask people who know sparc64 deeply. Are there any
> > > architecture limits which make hibernation on v9 impossible? May be
> > > anybody has researched this question.
> > 
> > I can't think of any sparc64 hardware which would support hibernation
> > in any reasonable way, so I'm quite surprised that you plan on
> > implementing support for it.  Perhaps you can elaborate your plans :-)
> 
> http://www.rugged-systems.com/p/mobilesunsolaris/0075.htm is a sparc64
> laptop :)

I'm actually tempeted by this:
http://www.ebay.de/itm/Tadpole-SparcBook-s3-GX-32-mb-no-HD-or-Battery-3GX-free-shipping-/390406182711?ptÞ_Technik_Computer_Peripherieger%C3%A4te_PC_Systeme&hash=item5ae6059737#ht_3226wt_1064

But I could also wait until someone donate me a not-so-power hungry sparc64 box.

	Sam

Re: Question about hibernation on sparc64

[Julian Calaby]

Sam,

On Fri, Apr 13, 2012 at 05:26, Sam Ravnborg <sam@ravnborg.org> wrote:
> On Thu, Apr 12, 2012 at 07:59:57PM +0100, Alex Buell wrote:
>> On Thu, 2012-04-12 at 12:32 -0400, David Miller wrote:
>> > From: Kirill Tkhai <tkhai@yandex.ru>
>> > Date: Thu, 12 Apr 2012 15:48:35 +0400
>> >
>> > > So I want to ask people who know sparc64 deeply. Are there any
>> > > architecture limits which make hibernation on v9 impossible? May be
>> > > anybody has researched this question.
>> >
>> > I can't think of any sparc64 hardware which would support hibernation
>> > in any reasonable way, so I'm quite surprised that you plan on
>> > implementing support for it.  Perhaps you can elaborate your plans :-)

I would guess that it would be possible to implement it 100% in
software - it is essentially just dumping ram to disk and powering
off. That said, I'm not sure what role the hardware, say, on x86 has
to play in facilitating that.

>> http://www.rugged-systems.com/p/mobilesunsolaris/0075.htm is a sparc64
>> laptop :)
>
> I'm actually tempeted by this:
> http://www.ebay.de/itm/Tadpole-SparcBook-s3-GX-32-mb-no-HD-or-Battery-3GX-free-shipping-/390406182711?ptÞ_Technik_Computer_Peripherieger%C3%A4te_PC_Systeme&hash=item5ae6059737#ht_3226wt_1064

The legendary tadpole! I'd be tempted too =)

Thanks,

-- 
Julian Calaby

Email: julian.calaby@gmail.com
Profile: http://www.google.com/profiles/julian.calaby/
.Plan: http://sites.google.com/site/juliancalaby/

Re: Question about hibernation on sparc64

[Kirill Tkhai]

12.04.2012,š20:32,š"DavidšMiller"š<davem@davemloft.net>:
>šFrom:šKirillšTkhaiš<tkhai@yandex.ru>
>šDate:šThu,š12šAprš2012š15:48:35š+0400
>
>>ššSošIšwantštošaskšpeoplešwhošknowšsparc64šdeeply.šAreštherešany
>>ššarchitecturešlimitsšwhichšmakešhibernationšonšv9šimpossible?šMayšbe
>>ššanybodyšhasšresearchedšthisšquestion.
>
>šIšcan'tšthinkšofšanyšsparc64šhardwarešwhichšwouldšsupportšhibernation
>šinšanyšreasonablešway,šsošI'mšquitešsurprisedšthatšyoušplanšon
>šimplementingšsupportšforšit.ššPerhapsšyoušcanšelaboratešyouršplansš:-)

1)AsšIšseešinšCONFIG_HIBERNATIONšcomment:

"InšprinciplešitšdoesšnotšrequirešACPIšoršAPM,šalthoughšforšexamplešACPIšwillšbešusedšforšthešfinalšstepsšwhenšitšisšavailable".

Andšit'sšimplementedšonšplatformsšw/ošACPIšlikešMIPS.

Sošitšseemsštošmešthatšitšdoesn'tšrequirešspecialšhardwarešsupport,šbutšexceptionsšarešpossible..

2)Duringšthešsecondšbootšhibernationšdoesšthešnormalšbootš(itšinitializesšhardware in its normal way - standard initcalls).
The only exeption is "late_initcall(software_resume)" which resumes the memory, but it is executed after hardware is initialized.
---

We are talking about hibernation, it's different from "suspend to RAM" operation. "Suspend to RAM" requires hardware support.

Kirill

Re: Question about hibernation on sparc64

[David Miller]

From: Kirill Tkhai <tkhai@yandex.ru>
Date: Fri, 13 Apr 2012 13:55:33 +0400

> 1)As I see in CONFIG_HIBERNATION comment:

Please fix your email client to not turn every space into an
"_" underscore character if you want to communicate with us.

Re: Question about hibernation on sparc64

[Tom Callaway]

On 04/12/2012 03:26 PM, Sam Ravnborg wrote:
> On Thu, Apr 12, 2012 at 07:59:57PM +0100, Alex Buell wrote:
>> On Thu, 2012-04-12 at 12:32 -0400, David Miller wrote:
>>> From: Kirill Tkhai <tkhai@yandex.ru>
>>> Date: Thu, 12 Apr 2012 15:48:35 +0400
>>>
>>>> So I want to ask people who know sparc64 deeply. Are there any
>>>> architecture limits which make hibernation on v9 impossible? May be
>>>> anybody has researched this question.
>>>
>>> I can't think of any sparc64 hardware which would support hibernation
>>> in any reasonable way, so I'm quite surprised that you plan on
>>> implementing support for it.  Perhaps you can elaborate your plans :-)
>>
>> http://www.rugged-systems.com/p/mobilesunsolaris/0075.htm is a sparc64
>> laptop :)
> 
> I'm actually tempeted by this:
> http://www.ebay.de/itm/Tadpole-SparcBook-s3-GX-32-mb-no-HD-or-Battery-3GX-free-shipping-/390406182711?ptÞ_Technik_Computer_Peripherieger%C3%A4te_PC_Systeme&hash=item5ae6059737#ht_3226wt_1064
> 
> But I could also wait until someone donate me a not-so-power hungry sparc64 box.

I actually have one of those Tadpoles. Not sparc64. Worked last time I
poked it, except for the video chipset and the PCMCIA.

~tom

=
Fedora Project

Re: Question about hibernation on sparc64

[Sam Ravnborg]

On Mon, Apr 16, 2012 at 04:11:58PM -0400, Tom Callaway wrote:
> On 04/12/2012 03:26 PM, Sam Ravnborg wrote:
> > On Thu, Apr 12, 2012 at 07:59:57PM +0100, Alex Buell wrote:
> >> On Thu, 2012-04-12 at 12:32 -0400, David Miller wrote:
> >>> From: Kirill Tkhai <tkhai@yandex.ru>
> >>> Date: Thu, 12 Apr 2012 15:48:35 +0400
> >>>
> >>>> So I want to ask people who know sparc64 deeply. Are there any
> >>>> architecture limits which make hibernation on v9 impossible? May be
> >>>> anybody has researched this question.
> >>>
> >>> I can't think of any sparc64 hardware which would support hibernation
> >>> in any reasonable way, so I'm quite surprised that you plan on
> >>> implementing support for it.  Perhaps you can elaborate your plans :-)
> >>
> >> http://www.rugged-systems.com/p/mobilesunsolaris/0075.htm is a sparc64
> >> laptop :)
> > 
> > I'm actually tempeted by this:
> > http://www.ebay.de/itm/Tadpole-SparcBook-s3-GX-32-mb-no-HD-or-Battery-3GX-free-shipping-/390406182711?ptÞ_Technik_Computer_Peripherieger%C3%A4te_PC_Systeme&hash=item5ae6059737#ht_3226wt_1064
> > 
> > But I could also wait until someone donate me a not-so-power hungry sparc64 box.
> 
> I actually have one of those Tadpoles. Not sparc64. Worked last time I
> poked it, except for the video chipset and the PCMCIA.
Whenever you have some time I would be glad if you could test
a sparc32 kernel.
sparc32 (for obvious reasons) does not see much test-coverage - so a little
more would be a great help to keep the sparc32 port alive.

	Sam

Re: Question about hibernation on sparc64

[marxdenl]

On Thu, 2012-04-12 at 15:48 +0400, Kirill Tkhai wrote:
> Hello!
> 
> I bumped on the fact that there is no hibernation support  
> on sparc64. It's possible that the process of its porting 
> will become interesting for me in the future, but I'm not 
> exactly sure at the moment.
> 
> So I want to ask people who know sparc64 deeply. Are there 
> any architecture limits which make hibernation on v9 impossible? 
> May be anybody has researched this question.

hi, I'm also intersting to do that. How is that going?

Waiting for reply:)

--
Linwen Deng

Re: Question about hibernation on sparc64

[Kirill Tkhai]

28.10.2012, 19:21, "marxdenl" <marxdenl@gmail.com>:
> On Thu, 2012-04-12 at 15:48 +0400, Kirill Tkhai wrote:
>
>> šHello!
>>
>> šI bumped on the fact that there is no hibernation support
>> šon sparc64. It's possible that the process of its porting
>> šwill become interesting for me in the future, but I'm not
>> šexactly sure at the moment.
>>
>> šSo I want to ask people who know sparc64 deeply. Are there
>> šany architecture limits which make hibernation on v9 impossible?
>> šMay be anybody has researched this question.
>
> hi, I'm also intersting to do that. How is that going?
>
> Waiting for reply:)

Hi, I did nothing. You may dive into this if you want.

Kirill

Re: Question about hibernation on sparc64

[marxdenl]

On Mon, 2012-10-29 at 02:47 +0400, Kirill Tkhai wrote:
> 
> 28.10.2012, 19:21, "marxdenl" <marxdenl@gmail.com>:
> > On Thu, 2012-04-12 at 15:48 +0400, Kirill Tkhai wrote:
> >
> >>  Hello!
> >>
> >>  I bumped on the fact that there is no hibernation support
> >>  on sparc64. It's possible that the process of its porting
> >>  will become interesting for me in the future, but I'm not
> >>  exactly sure at the moment.
> >
> > hi, I'm also intersting to do that. How is that going?
> >
> > Waiting for reply:)
> 
> Hi, I did nothing. You may dive into this if you want.

I enabled CONFIG_HIBERNATION, implemented 'swsusp_arch_suspend'
which saves some general registers (%g,%i,%o,%l) and call 
'swsusp_save', and 'swsusp_arch_resume' which load 'pblist' and
restore those registers.

Now my T2 can create hibernation images, but after restore the image, 
it crashes. If there's something I missed?

Thanks!

--
Linwen Deng 

Re: Question about hibernation on sparc64

[marxdenl]

On Mon, 2012-10-29 at 02:47 +0400, Kirill Tkhai wrote:
> 
> 28.10.2012, 19:21, "marxdenl" <marxdenl@gmail.com>:
> > On Thu, 2012-04-12 at 15:48 +0400, Kirill Tkhai wrote:
> >
> >>  Hello!
> >>
> >>  I bumped on the fact that there is no hibernation support
> >>  on sparc64. It's possible that the process of its porting
> >>  will become interesting for me in the future, but I'm not
> >>  exactly sure at the moment.
> >
> > hi, I'm also intersting to do that. How is that going?
> >
> > Waiting for reply:)
> 
> Hi, I did nothing. You may dive into this if you want.

I enabled CONFIG_HIBERNATION, implemented 'swsusp_arch_suspend'
which saves some general registers (%g,%i,%o,%l) and call 
'swsusp_save', and 'swsusp_arch_resume' which load 'pblist' and
restore those registers.

Now my T2 can create hibernation images, but after restore the image, 
it crashes. If there's something I missed?

Thanks!

--
Linwen Deng