On Tue, Nov 10, 2015 at 02:22:44PM -0500, Boris Ostrovsky wrote: > Doing so will cause the grant to be unmapped and then, during > fault handling, the fault to be mistakenly treated as NUMA hint > fault. > > In addition, even if we those maps could partcipate in NUMA > balancing it wouldn't provide any benefit since we wouldn't be > able to determine physical page's node (even if/when VNUMA is > implemented). > > Marking grant maps' VMAs as VM_IO will exclude them from being > part of NUMA balancing. >
Should this be 'cc:sta...@vger.kernel.org' ? > Signed-off-by: Boris Ostrovsky <boris.ostrov...@oracle.com> > --- > drivers/xen/gntdev.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c > index 67b9163..bf312df 100644 > --- a/drivers/xen/gntdev.c > +++ b/drivers/xen/gntdev.c > @@ -802,7 +802,7 @@ static int gntdev_mmap(struct file *flip, struct > vm_area_struct *vma) > > vma->vm_ops = &gntdev_vmops; > > - vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; > + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP | VM_IO; > > if (use_ptemod) > vma->vm_flags |= VM_DONTCOPY; > -- > 1.7.1 > _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
