Re: Documentation on /sys/power/resume

[Bill Davidsen]

Rafael J. Wysocki wrote:
> On Sunday, 27 May 2007 14:53, Bill Davidsen wrote:
>   
> > Rafael J. Wysocki wrote:
> >     
> > > Hi,
> > >
> > > On Sunday, 27 May 2007 01:51, Bill Davidsen wrote:
> > >       
> > > > Not in the ABI doc, is there and doc at all, and if not could someone 
> > > > who knows where it's used might give me a hint, as a quick look didn't 
> > > > bring enlightenment. Or is it a future hook which doesn't work yet?
> > > >         
> > > That's something that in theory may allow you to resume the system from
> > > and initrd script.
> > >
> > > Basically, you write your resume device's major and minor numbers
> > > into it as the "MAJ:MIN" string (eg. "8:3" for /dev/sda3 on my box) and the
> > > kernel will try to read the image from this device and restore it.
> > >
> > > It only works with partitions and the use of it us discouraged, so it's
> > > deliberately undocumented.
> > >
> > >       
> > Thanks, that's just different enough from what little info I had to make 
> > what I have not work. I'm looking at resume from a non-swap location.
> >     
>
> Only suspend2 can do this right now.  The built-in swsusp can resume from a
> swap file as long as it's not located on LVM.
>   
Sounds like sispend2 is still needed, I haven't needed a suspending 
kernel in a few years, and I was hoping that with suspend working in 
mainline that resume would have been implemented. Sounds as if that's 
not the case, my swap is RAID1, I was hoping to resume from one of the 
mirrors, since they are based on a partition. No joy wit or without 
/sys/power/resume, so I'll look further.

--
bill davidsen <davidsen@xxxxxxx>
 CTO TMR Associates, Inc
 Doing interesting things with small computers since 1979

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