On Sun, 22 Apr 2007 21:18:46 +0200 "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote:
> On Sunday, 22 April 2007 11:40, Rafael J. Wysocki wrote:
> > On Sunday, 22 April 2007 01:02, Tim Dijkstra wrote:
> > > On Sat, 21 Apr 2007 23:14:48 +0200
> > > "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote:
> > >
> > > > On Saturday, 21 April 2007 22:36, Tim Dijkstra wrote:
> > > > > On Sat, 21 Apr 2007 11:30:22 +0200
> > > > > "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote:
> > > > >
> > > > > > On Saturday, 21 April 2007 00:59, Tim Dijkstra wrote:
> > > > > > > Hi,
> > > > > > >
> > > > > > > I'm trying out sdisk with a swap file.
> > > > > > >
> > > > > > > $ cat /proc/swaps
> > > > > > > Filename Type Size
> > > > > > > Used Priority
> > > > > > > /dev/hda2 partition 979956
> > > > > > > 189972 -1
> > > > > > > /local/tmp/swapfile file 1048568 0
> > > > > > > -2
> > > > > > >
> > > > > > > Now what maybe complicates things is that mounted on /local is an
> > > > > > > lvm
> > > > > > > logical volume, /dev/dm-5
> > > > > > >
> > > > >
> > > > > >
> > > > > > First, try the built-in swsusp.
> > > > >
> > > > > Doesn't work.
> > > > > $ cat /proc/cmdline
> > > > > root=/dev/hda1 ro acpi_sleep=s3_bios,s3_mode vga=0x0330
> > > > > resume=/dev/dm-5 resume_offset=12979490
> > > > >
> > > > > The result of `echo disk > /sys/power/state':
> > > > >
> > > > > Wrote ... kbytes in ... sec
> > > > > S<6>attempt to access beyond end of device
> > > > > hda2: rw=16, want=103835928, limit=1959930
> > > > > read-error on swap-device (3:2:103835928)
> > > > > swsusp: Swap header not found!
> > > > >
> > > > >
> > > > > BTW, /dev/hda2 is my other swap partition... Should I do anything else
> > > > > except specifying resume en resume_offset on the command-line?
> > > >
> > > > Ouch, sorry. That has no chance to work, because /dev/dm-5 is not
> > > > known to the
> > > > kernel before LVMs are initialized which happens after the resume kicks
> > > > in, so
> > > > swsusp gets confused.
> > >
> > > OK, but this is at suspend, then /dev/dm-5 is known.
> >
> > This doesn't matter, because the resume device is selected at boot time.
> >
> > > And this problem shouldn't be a problem in the case of uswsusp, should it?
> >
> > No, it shouldn't.
> >
> > I'll try to debug it a little later today, but I have no LVM setup handy.
>
> I've tested with a swap on a "regular" partition and it works as expected.
> If provided with the right swap offset (as returned by swap-offset from a
> recent CVS), suspends and resumes. When provided with a wrong offset,
> refuses to do anything.
>
> I think we have to debug the swap-file-on-LVM case more thoroughly.
OK, I've tried printing out /dev/resume_device + offset in mark_swap.
Does the following seem reasonable?
char ff[100];
lseek(fd, shift, SEEK_SET);
read(fd,ff,80);
printf("The header (shift %u): %80s\n", shift, ff);
It prints nothing ...
grts Tim
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