[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Re: Illegal PV kernel pfm/pfn translations on PROT_NONE ioremaps
On 19/3/08 18:52, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote: >> Yep. There are a number of bits that could be used: for example, I >> don't think PROT_WRITE is ever going to be set on a PROT_NONE page, >> either. > > My point is the flag would be set even when the protection is not PROT_NONE. > It has other uses beyond fixing this bug. > > I might look into doing this myself as I think it is probably the best fix for > this issue. ...and the issue is now fixed (changeset 488) in http://xenbits.xensource.com/staging/linux-2.6.18-xen.hg The patch is a minimal one given the approach of using a new _PAGE_IO flag. For example, pte_pfn() probably no longer needs to use mfn_to_local_pfn() and could use the simpler and faster mfn_to_pfn() instead. But that belongs in a separate patch. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |