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

When I submitted the MCA support patches, I also sent
a design document as a pdf file to this list.
This should answer below questions.


On Friday 26 September 2008 16:35:55 Jiang, Yunhong wrote:
> 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
> _______________________________________________
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