Ian Pratt
2005-Apr-28 23:56 UTC
RE: [Xen-devel] recent changes to writable page tables on -unstable andxend
> Any thought on which of the recent writable pagetable changes > could be causing an update to fail where it succeeded on xen > 6 days ago?As I recall, we were taking the emulation path every time until quite recently. Are you sure you were actually using writeable pagetables before? 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. Ian _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Kip Macy
2005-Apr-29 00:16 UTC
Re: [Xen-devel] recent changes to writable page tables on -unstable andxend
> 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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel