From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 17 Oct 2019 00:52:12 -0500 (CDT) From: Per Oberg Message-ID: <479718447.15280.1571291532705.JavaMail.zimbra@wolfram.com> In-Reply-To: References: <7f7c7a6a-ae0b-a95a-93ec-05940a109fc3@linx-info.com> <1830389674.1482147.1571212525654@mail.yahoo.com> Subject: Re: issue of hibernate for ipipe MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: xenomai Cc: Jan Kiszka , Alec Ari , =?utf-8?B?5b2t5b+X6Iiq?= , duanwujie ----- Den 17 okt 2019, p=C3=A5 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:=20 Is there a reason you need this functionality? Does it benefit your product= or application somehow? Do you perhaps have a controller that sometimes ne= eds real time performance and sometimes needs to hibernate/sleep to save po= wer? > =E5=9C=A8 2019/10/17 =E4=B8=8A=E5=8D=881:29, Jan Kiszka =E5=86=99=E9=81= =93: > > On 16.10.19 09:55, Alec Ari via Xenomai wrote: >>> Hibernate/suspend/C-states etc generally cause problems with IPIPE. Bes= t 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=EF=BC=9Awujie duan > Tel=EF=BC=9A028-65182023-6202 > E-mail: wjduan@linx-info.com > * Per =C3=96berg=20