Re: Re: Dom0 ACPI S3 patches

[Adi Kriegisch <adi@cg.tuwien.ac.at>]

On Wed, Sep 14, 2011 at 11:47:26AM -0400, Konrad Rzeszutek Wilk wrote:
> On Wed, Sep 14, 2011 at 05:09:34PM +0200, Adi Kriegisch wrote:
> > On Wed, Sep 14, 2011 at 10:28:54AM -0400, Konrad Rzeszutek Wilk wrote:
> > > > > Excellent. Is it OK if I put 'Tested-by: Adi Kriegish" on them?
> > > > Sure, go ahead! ;-)
Now, I think, you may really go ahead! ;-) 'nopat' did the trick for me.

> > > Hmmm.. I wonder if you are hitting the writecombine issue I've seen sometimes.
> > > Just to eliminate it, can you try 'nopat' on the Linux command line?
> > Sure. Do you know any way to make sure I am hitting the writecombine issue
> > fast, so that I can make (kind of) sure everything is working?
> Mysterious applications crashing left and right. Under my box bash stopped
> working right and such. Pretty obvious that something went wrong.
Hmmm... I rethought the workloads I had and found a way to reproduce the
crashes -- more or less reliably:
As I did a complete reinstallation of my notebook, I had a lot of data to
copy. The first bunch of sutff was copied on Dom0 -- this was where I
experienced the crashes; not immediately while copying but a little later
(The warnings in the syslog always happened during copying, btw).
Then -- after I basic setup was done -- I used xm block-attach and copied
tons of stuff within a DomU. I did not experience a single crash while
doing so.

Do you want me to do something to further debug the issue? Just tell me
what I could/should try to do! ;-)

> > > > > http://lists.xensource.com/archives/html/xen-devel/2010-02/msg00469.html
> > > > Sounds like it could be related. Shall I apply that patch? If so, which
> > > > hook takes care that the function is called?
[SNIP]
> > It does not apply at all:
> 
> Pfff.. well, I will try to rebase it in a couple of days. Can you ping in a week
> if I haven't sent anything to you yet?
Yes, I will! ;-)

-- Adi