On 2022-09-07 22:25:04 [-0400], guoren@xxxxxxxxxx wrote: > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index a07bb3b73b5b..a8a12b4ba1a9 100644 > --- a/arch/riscv/Kconfig > +++ b/arch/riscv/Kconfig > @@ -433,6 +433,14 @@ config FPU > > If you don't know what to do here, say Y. > > +config IRQ_STACKS > + bool "Independent irq stacks" > + default y > + select HAVE_IRQ_EXIT_ON_IRQ_STACK > + help > + Add independent irq stacks for percpu to prevent kernel stack overflows. > + We may save some memory footprint by disabling IRQ_STACKS. Do you really think that it is needed to save memory here? Avoiding stack overflows in deep call chains is probably more important than saving ~8KiB per CPU. Sebastian
