Hi, Arnd, On Mon, Mar 21, 2022 at 4:43 PM Arnd Bergmann <arnd@xxxxxxxx> wrote: > > On Sat, Mar 19, 2022 at 3:38 PM Huacai Chen <chenhuacai@xxxxxxxxxx> wrote: > > > +#ifdef CONFIG_PAGE_SIZE_64KB > > +#define THREAD_SIZE_ORDER (0) > > +#endif > > + > > +#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) > > +#define THREAD_MASK (THREAD_SIZE - 1UL) > > + > > Having a 64KB stack area is rather wasteful. I think you should use a sub-page > allocation in this configuration, or possibly disallow 64KB page configuration > entirely. > > Note that you have to use full pages when using CONFIG_VMAP_STACK, but > you don't seem to support that at the moment, so allocating only 16KB stacks > on a 64KB page config should still work. I think using a 16KB stack for all configurations (4KB/16KB/64KB) is the simplest way. Right? Huacai > > Arnd
