Re: [PATCH v3] arm64: run softirqs on the per-CPU IRQ stack

[Qi Zheng]

On 2022/9/7 21:34, Will Deacon wrote:
> On Wed, Sep 07, 2022 at 03:04:48PM +0800, Qi Zheng wrote:
> > On 2022/8/26 12:16, Qi Zheng wrote:
> > > On 2022/8/15 20:47, Qi Zheng 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>
> > > > Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
> > > > Acked-by: Will Deacon <will@xxxxxxxxxx>
> > > > ---
> > > > v2: https://lore.kernel.org/lkml/20220802065325.39740-1-zhengqi.arch@xxxxxxxxxxxxx/
> > > > v1: https://lore.kernel.org/lkml/20220708094950.41944-1-zhengqi.arch@xxxxxxxxxxxxx/
> > > > RFC: https://lore.kernel.org/lkml/20220707110511.52129-1-zhengqi.arch@xxxxxxxxxxxxx/
> > > >
> > > > Changelog in v2 -> v3:
> > > >    - rebase onto the v6.0-rc1
> >
> > Hi Will,
> >
> > Are we good to merge this patch? Or if there is anything else I need to
> > do, please let me know. :)
>
> I'm expecting Catalin to pick this one up for 6.1.

Oh, I see. Looking forward to this.

Thanks a lot.
Qi

> Will

--
Thanks,
Qi