On Tue, Aug 14, 2018 at 08:17:31PM +0800, Xiaofeng Yuan wrote: > The check_heap_object() checks the spanning multiple pages and slab. > When the page-spanning test is disabled, the check_heap_object() is > redundant for spanning multiple pages. However, the kernel stacks are > multiple pages under certain conditions: CONFIG_ARCH_THREAD_STACK_ALLOCATOR > is not defined and (THREAD_SIZE >= PAGE_SIZE). At this point, We can skip > the check_heap_object() for kernel stacks to improve performance. > Similarly, the virtually-mapped stack can skip check_heap_object() also, > beacause virt_addr_valid() will return. Why not just check_stack_object() first, then check_heap_object() second?
