Re: [Xen-devel] [RFC][PATCH 0/2] MCA support for Intel64

[SUZUKI Kazuhiro <kaz@xxxxxxxxxxxxxx>]

Hi,

Thank you for your comment and information.
But, I wonder where to start about these issues.

> BTW, I checked you patch to kernel of mce-xen.c, seems not much change to it. 
> You will add more changes on it, right?

Yes, I plan to implement memory offlining, if the impacted physical
memory is detected by MCA, it will be offlined and never reused. Then
Xen notifies it to Dom0/DomU. Dom0/DomU's handler should kill such
a process or do something.

Thanks,
KAZ


From: "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>
Subject: RE: [Xen-devel] [RFC][PATCH 0/2] MCA support for Intel64
Date: Fri, 26 Sep 2008 22:35:55 +0800

> Glad to know you are working on MCA too.
> There are some discussion already on it, I google and get the link 
> http://article.gmane.org/gmane.comp.emulators.xen.devel/56284 for some 
> discussion. You can check that thread.
> 
> Some point need discussion including:
> 1) How to detect the impacted components in Xen side? As the above mail 
> thread discussed, maybe some improvement can be added to check the context 
> more precisely. For example, if the stack tell the MCE happens when Xen is 
> running, even if current is idle, we still think Xen is impacted. Also we can 
> check the page owner to decide impacted guest. Personally I don't think 
> "current" is very helpful.
> 2) How to split the effort between Xen and Dom0? Maybe we can re-use dom0's 
> MCE handler as much as possible, Xen will only do some initial containment, 
> especially considering Linux is also enhancing MCE handler. Of course, 
> another option is to place all handler in Xen side.
> 3) We need consider what will happen if multiple MCA happen at multiple CPU 
> simuatanously, maybe some monarch algrithom is needed.
> 
> Hope your input on it.
> 
> BTW, I checked you patch to kernel of mce-xen.c, seems not much change to it. 
> You will add more changes on it, right?
> 
> Thanks
> Yunhong Jiang
> 
> xen-devel-bounces@xxxxxxxxxxxxxxxxxxx <> wrote:
> > Hi,
> >
> > I am interested in MCA/MCE on x86 system. But I don't have AMD
> > machine, so I tried to port MCA handler on AMD k8 to Intel p4, I
> > attach it. Additionally, I attach a patch that supports MCA handler for
> > linux-2.6.18-xen/x86_64.
> >
> > Unfortunately, I don't know how to test MCA/MCE on Intel p4 CPU and
> > chipset, so I could not test with real MCA only in testing with fake
> > mode(just function calling). Is there anyone who knows and teaches me how
> > to test the real MCA?
> >
> > [1/2] xen part: mca-support-for-intel-xen.patch
> > [2/2] linux/x86_64 part: mca-support-for-intel-linux.patch
> >
> > Signed-off-by: Kazuhiro Suzuki <kaz@xxxxxxxxxxxxxx>
> >
> > Thanks,
> > KAZ
> >
> > _______________________________________________
> > 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