On Thu, 12 Nov 2015, Jason J. Herne wrote: > MADV_NOHUGEPAGE processing is too restrictive. kvm already disables > hugepage but hugepage_madvise() takes the error path when we ask to turn > on the MADV_NOHUGEPAGE bit and the bit is already on. This causes Qemu's > new postcopy migration feature to fail on s390 because its first action is > to madvise the guest address space as NOHUGEPAGE. This patch modifies the > code so that the operation succeeds without error now. > > Signed-off-by: Jason J. Herne <jjherne@xxxxxxxxxxxxxxxxxx> > Reviewed-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> Acked-by: David Rientjes <rientjes@xxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>