RE: [Xen-users] System-RAM: 3325MB question

To:	"Frank Schubert" <f.schubert@xxxxxxxxxxxx>, "Xen-Users Mailinglist" <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject:	RE: [Xen-users] System-RAM: 3325MB question
From:	"Petersson, Mats" <Mats.Petersson@xxxxxxx>
Date:	Fri, 28 Apr 2006 16:59:19 +0200
Delivery-date:	Fri, 28 Apr 2006 08:00:14 -0700
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Thread-topic:	[Xen-users] System-RAM: 3325MB question

> xm dmesg says:
> [...]
> (XEN) Using scheduler: Simple EDF Scheduler (sedf)
> (XEN) PAE disabled.
> (XEN) found SMP MP-table at 000ff780
> [...]
> 
> Can I simply enable PAE with a kernel option in grub?
> (The output looks like i could do that.)
> 
You need to enable PAE in both Xen and Linux - they need to be a
matching setup otherwise it won't work [this is because Xen handles the
page-tables for Linux and it obviously needs to handle the same LEVEL of
page tables as Linux thinks it should be!]. 

So you need to set the 64G configuration option in .config for Linux,
and the PAE option in the Xen config file (Config.mk: XEN_TARGET_X86_PAE
= y). 

This will obviously need a recompile of both Xen and the Linux kernel...


--
Mats


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