[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 at bytedance.com>
>>>> Reviewed-by: Arnd Bergmann <arnd at arndb.de>
>>>> Acked-by: Will Deacon <will at kernel.org>
>>>> ---
>>>> v2: https://lore.kernel.org/lkml/20220802065325.39740-1-zhengqi.arch@bytedance.com/
>>>> v1: https://lore.kernel.org/lkml/20220708094950.41944-1-zhengqi.arch@bytedance.com/
>>>> RFC: https://lore.kernel.org/lkml/20220707110511.52129-1-zhengqi.arch@bytedance.com/
>>>>
>>>> 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