On Sunday, 25 March 2007 01:14, Tim Dijkstra wrote:
> On Sun, 25 Mar 2007 00:17:22 +0100
> "Cédric Boutillier" <[EMAIL PROTECTED]> wrote:
>
> > > Which kernel are you using? Could you try to catch the error code that
> > > s2both returns? Or just add two printf's that print out the error code?
> >
> > I have modified the three lines you mentionned as follows:
> > error = ioctl(dev, SNAPSHOT_SET_SWAP_AREA, &swap);
> > printf("Error: errno = %d\n", errno);
> > if (error && !offset) {
> > error = ioctl(dev, SNAPSHOT_SET_SWAP_FILE, blkdev);
> > printf("Error: errno = %d\n", errno);
> > }
> >
> > After having rebuild and reinstalled the package, I get the followind
> > messsage :
> > $ sudo s2both
> > Error: errno = 25
>
> ENOTTY, That is to be expected from 2.6.18, there isn't support yet for
> SNAPSHOT_SET_SWAP_AREA
>
> > Error: errno = 22
> > suspend: Could not use the resume device (try swapon -a)
> > zsh: exit 22 sudo s2both
>
> OK, that is EINVAL. Reading the kernel source, it seems it can't
> decode the value that represents the device we're sending to the kernel.
> I don't understand ...
Well, there's a hack in the kernel that works on x86_*, but may not be
portable (I didn't think of that). Namely, we use old_decode_dev() to
obtain the device number from what the user space gives us and that
need not work on powerpc, at least in principle.
Greetings,
Rafael
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