On Tue, Sep 20, 2022 at 3:18 PM Arnd Bergmann <arnd@xxxxxxxx> wrote: > > On Tue, Sep 20, 2022, at 2:46 AM, Guo Ren wrote: > > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > > index dfe600f3526c..8def456f328c 100644 > > --- a/arch/riscv/Kconfig > > +++ b/arch/riscv/Kconfig > > @@ -442,6 +442,16 @@ config IRQ_STACKS > > Add independent irq & softirq stacks for percpu to prevent > > kernel stack > > overflows. We may save some memory footprint by disabling IRQ_STACKS. > > > > +config THREAD_SIZE > > + int "Kernel stack size (in bytes)" if EXPERT > > + range 4096 65536 > > + default 8192 if 32BIT && !KASAN > > + default 32768 if 64BIT && KASAN > > + default 16384 > > + help > > + Specify the Pages of thread stack size (from 4KB to 64KB), which also > > + affects irq stack size, which is equal to thread stack size. > > I still think this should be guarded in a way that prevents > setting the stack to smaller than default values unless VMAP_STACK > is set as well. Current VMAP_STACK would double THREAD_SIZE. Let me see how to reduce the VMAP_STACK. > > Arnd -- Best Regards Guo Ren
