Re: issue of hibernate for ipipe

[Per Oberg <pero@wolfram.com>]

----- Den 17 okt 2019, på kl 2:56, xenomai xenomai@xenomai.org skrev:

> Here is my test case:

> Install debian 9.6 in virtual machine(virtualbox).

> - Case 1: Build ipipe kernel(4.9.146) with debian's kerner default
> config, when use this kernel to bootup system, click hibernate
> button(This condition will be failed)

> - Case 2: Build ipipe kernel(4.14.134) with debian's kernel default
> config (this version will be success), can hibernate and wake up

I think what Jan ment with his question was: 
Is there a reason you need this functionality? Does it benefit your product or application somehow? Do you perhaps have a controller that sometimes needs real time performance and sometimes needs to hibernate/sleep to save power?

> 在 2019/10/17 上午1:29, Jan Kiszka 写道:
> > On 16.10.19 09:55, Alec Ari via Xenomai wrote:
>>> Hibernate/suspend/C-states etc generally cause problems with IPIPE. Best to not
> >> have any of that.
> > Indeed (at least hibernate and suspend). I remember having looked at
> > these paths only a long time ago (>10 years) when I was running Xenomai
> > for testing purposes on my notebook. And that was recurring effort.
> > Since then, likely no one cared.

> > We could declare the related config options as "depends on !IPIPE" to
> > avoid troubles.

> > Or do you have an actual use case for for hibernate, Wujie Duan?

> > Jan

> --
> *Linx Software Corportaion Sichuan Branch
> Name：wujie duan
> Tel：028-65182023-6202
> E-mail: wjduan@linx-info.com
> *

Per Öberg