Re: [PATCH v1 1/2] arm64: run softirqs on the per-CPU IRQ stack

[Qi Zheng]

On 2022/7/14 19:32, Arnd Bergmann wrote:
> On Fri, Jul 8, 2022 at 11:49 AM Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> wrote:
> > Currently arm64 supports per-CPU IRQ stack, but softirqs
> > are still handled in the task context.
> >
> > Since any call to local_bh_enable() at any level in the task's
> > call stack may trigger a softirq processing run, which could
> > potentially cause a task stack overflow if the combined stack
> > footprints exceed the stack's size, let's run these softirqs
> > on the IRQ stack as well.
> >
> > Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
>
> This seems like a nice improvement, and this version addresses
> my concern I raised on the RFC version.
>
> Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>

Thanks for your review. :)

--
Thanks,
Qi