RE: [Xen-devel] Host S3

[scorbin <steve.corbin@xxxxxxxxxxxxxxxxxxx>]

I got the XCI build up and running but dom0 does not provide the
functionality I am looking for.  There is no ability to run X or GDM.
So far the issues I am seeing with host suspend/resume seem to be
graphics and SMP related, issues which XCI does not address.

I would like to get dom0 suspend/resume working with Ubuntu 8.04 or 9.04
running on top of Xen.  I have used s2ram, pm-suspend and some
roll-my-own scripts with less than stellar results.

The current issue I am looking at is that Xen's time is not working
after resume.  Both clocksource/1 and timer isr/1 print out persistent
"Time went backwards" messages.

- steve


On Wed, 2009-07-01 at 16:41 -0400, Kamala Narasimhan wrote:
> You might want to consider using the XCI build which already takes care of 
> this issue.  We have added the necessary user mode quirks plus included 
> relevant components you would need along with appropriate emulation library 
> that would work with 64-bit hypervisor etc.
> 
> Kamala
> 
> > -----Original Message-----
> > From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> > bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of scorbin
> > Sent: Wednesday, July 01, 2009 2:26 PM
> > To: xen-devel
> > Subject: Re: [Xen-devel] Host S3
> > 
> > It looks like suspend.sf.net will not work.  The s2ram utility
> > requires /proc/sys/kernel/acpi_sleep_flags which does not exist in the
> > Xen patched Linux kernel.  It is removed via CONFIG_ACPI_PV_SLEEP.
> > 
> > So how are people using dom0 suspend/resume?  Any sample scripts/code?
> > Simply doing 'echo mem > /sys/power/state' does not restore the
> > graphics
> > card.  I also tried a script I found on the web that effectively does:
> > 
> > # dump current data from the video card to the temporary file
> > cat /proc/bus/pci/$ID > $TMP_FILE
> > 
> > # suspend
> > echo -n mem > /sys/power/state
> > 
> > # restore video card data from the temporary file on resume
> > cat $TMP_FILE > /proc/bus/pci/$ID
> > 
> > with the same result that bare Linux works but booting with Xen does
> > not
> > restore the video card.
> > 
> > - steve
> > 
> > On Wed, 2009-07-01 at 13:40 -0400, scorbin wrote:
> > > I tried it on a Dell, Lenovo and 2 HPs.  Upon further investigation
> > it
> > > turns out the systems are resuming but the video card is not
> > > re-initialized.  It's strange because I can use the same procedure
> > for
> > > Linux without Xen and the video resumes properly.
> > >
> > > Searching the web I found suspend.sf.net.  Is this what people are
> > using
> > > to do the video restore?
> > >
> > >
> > > On Wed, 2009-07-01 at 20:08 +0300, Tom Rotenberg wrote:
> > > > What is the hardware it didn't work for you?
> > > >
> > > > 2009/7/1 scorbin <steve.corbin@xxxxxxxxxxxxxxxxxxx>
> > > >         What is the state of host suspend to ram?  I noticed that
> > this
> > > >         functionality was put into 3.2 with fixes in 3.3.  I also
> > saw
> > > >         something
> > > >         recently that indicates there might be a separate tree
> > where
> > > >         suspend/S3
> > > >         is being developed/enhanced?
> > > >
> > > >         I did try Xen3.3/Ubuntu8.04 and did not get host S3 to
> > resume
> > > >         properly.
> > > >         Straight Ubuntu 8.04 suspends/resumes fine.
> > > >
> > > >
> > > >
> > > >         _______________________________________________
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> > > >         Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > >         http://lists.xensource.com/xen-devel
> > >
> > >
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-devel
> > >
> > 
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> 


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