On Tue, 2018-07-10 at 16:57 -0700, Dave Hansen wrote: > On 07/10/2018 03:26 PM, Yu-cheng Yu wrote: > > > > The indirect branch tracking legacy bitmap takes a large address > > space. This causes may_expand_vm() failure on the address limit > > check. For a IBT-enabled task, add the bitmap size to the > > address limit. > This appears to require that we set up > current->thread.cet.ibt_bitmap_size _before_ calling may_expand_vm(). > What keeps the ibt_mmap() itself from hitting the address limit? Yes, that is overlooked. I will fix it. Thanks, Yu-cheng
