On Wed, Oct 30, 2013 at 04:51:29PM -0200, Marcelo Tosatti wrote: > On Wed, Oct 30, 2013 at 05:49:49PM +0100, Igor Mammedov wrote: > > On Tue, 29 Oct 2013 19:38:44 -0200 > > Marcelo Tosatti <mtosa...@redhat.com> wrote: > > > > > On Tue, Oct 29, 2013 at 07:18:49PM +0100, Igor Mammedov wrote: > > > > Otherwise 1GB TLBs cannot be cached for the range. > > > > > > This fails to back non-1GB-aligned gpas, but 2MB aligned, with 2MB large > > > pages. > > With current command line only one hugetlbfs mount point is possible, so it > > will back with whatever alignment specified hugetlbfs mount point has. > > Anything that doesn't fit into page aligned region goes to tail using > > non hugepage baked phys_mem_set_alloc()=qemu_anon_ram_alloc() allocator. > > The patch you propose allocates the non-1GB aligned tail of RAM with 4k > pages. As mentioned, this is not acceptable (2MB pages should be used > whenever 1GB alignment is not possible).
Tail and 3-4GB region.
