On 03/07/2012 04:57 PM, Alexander Graf wrote: > On 03/07/2012 03:04 PM, Avi Kivity wrote: >> On 03/07/2012 03:27 PM, Alexander Graf wrote: >>>> At the time I made this patch, it seemed that only kvm-x86 supported >>>> huge pages, on ppc the array should be empty: >>> >>> Hrm. I suppose this refers to transparent huge pages? >> Just huge pages. Whether they are static or dynamic is immaterial in >> this context. > > Well, book3s_hv and e500 support hugetlbfs. I've never had to touch > that patches code though - so I guess I'm still not really > understanding what it's there for O_o. >
The kvm hugepage code uses large sptes to map large pages, when available (either via hugetlbfs or transparent hugepages). Since x86 supports swapping, and needs to write-protect pages for dirty logging and for shadowing guest pagetables, it needs a reverse map from pages to sptes. The data structure we're discussing is part of the reverse map for large pages. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
