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Re: [Xen-devel] recent changes to writable page tables on -unstable andx
| To: | Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] recent changes to writable page tables on -unstable andxend |
| From: | Kip Macy <kip.macy@xxxxxxxxx> |
| Date: | Thu, 28 Apr 2005 17:16:40 -0700 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Fri, 29 Apr 2005 00:16:22 +0000 |
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| Reply-to: | Kip Macy <kip.macy@xxxxxxxxx> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
> As I recall, we were taking the emulation path every time until quite
> recently. Are you sure you were actually using writeable pagetables
> before?
Well, last week I spent an hour or two removing places where FreeBSD
blew up when it tried to write directly to a page directory because
previously I didn't differentiate between PD and PT updates and today
when I removed the WRITABLE_PAGETABLES define the code initially
wouldn't compile. I can test out a tree from as of my checkin, but I'm
fairly positive.
> You probably want to augment the debug message to print out a bit more
> about the old and new pte, page type, and which pages are in wrpt mode.
Ok, I'll do that thanks.
-Kip
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