Re: [linux-lvm] 2.6.22-rc5 XFS fails after hibernate/resume

Rafael J. Wysocki
2007-07-02T20:15:11Z

On Monday, 2 July 2007 18:36, David Greaves wrote:
> Rafael J. Wysocki wrote:
> > On Monday, 2 July 2007 16:32, David Greaves wrote:
> >> Rafael J. Wysocki wrote:
> >>> On Monday, 2 July 2007 12:56, Tejun Heo wrote:
> >>>> David Greaves wrote:
> >>>>>> Tejun Heo wrote:
> >>>>>>> It's really weird tho. The PHY RDY status changed events are coming
> >>>>>>> from the device which is NOT used while resuming
> >>>>> There is an obvious problem there though Tejun (the errors even when sda
> >>>>> isn't involved in the OS boot) - can I start another thread about that
> >>>>> issue/bug later? I need to reshuffle partitions so I'd rather get the
> >>>>> hibernate working first and then go back to it if that's OK?
> >>>> Yeah, sure. The problem is that we don't know whether or how those two
> >>>> are related. It would be great if there's a way to verify memory image
> >>>> read from hibernation is intact. Rafael, any ideas?
> >>> Well, s2disk has an option to compute an MD5 checksum of the image during
> >>> the hibernation and verify it while reading the image.
> >> (Assuming you mean the mainline version)
> >>
> >> Sounds like a good think to try next...
> >> Couldn't see anything on this in ../Documentation/power/*
> >> How do I enable it?
> >
> > Add 'compute checksum = y' to the s2disk's configuration file.
>
> Ah, right - that's uswsusp isn't it? Which isn't what I'm having problems with
> AFAIK?
>
> My suspend procedure is:
>
> xfs_freeze -f /scratch
> sync
> echo platform > /sys/power/disk
> echo disk > /sys/power/state
> xfs_freeze -u /scratch
>
> Which should work (actually it should work without the sync/xfs_freeze too).
>
> So to debug the problem I'd like to minimally extend this process rather than
> replace it with another approach.

Well, this is not entirely "another approach". Only the saving of the image is
done differently, the rest is the same.

> I take it there isn't an 'echo y > /sys/power/do_image_checksum'?

No, there is not anything like that.

Greetings,
Rafael

--
"Premature optimization is the root of all evil." - Donald Knuth