Re: [PATCH 1/4] LoongArch: Use trampoline for exception handlers and kill la.abs

[Xi Ruoyao]

On Mon, 2023-01-16 at 09:30 +0800, Huacai Chen wrote:
> On Sat, Jan 14, 2023 at 2:38 PM Jinyang He <hejinyang@xxxxxxxxxxx>
> wrote:
> > 
> > Hi, Ruoyao and Youling,
> > 
> > I care about the performance when NUMA enabled. We set CSR.EENTRY
> > for each possible cpus where is NUMA-relative. So, I guess the more
> > codes in NUMA-relative memory makes more performance. If we just set
> > handler_trampoline as exception handler, the performance may be
> > influenced.
> So copying both the handlers and handler_trampoline can solve the
> problem? If that is possible, please do that on top of the latest code
> in
> https://github.com/loongson/linux/commits/loongarch-next

Hi folks,

I just wrote the trampoline code as a PoC to show "relocatable kernel
can work" and there must be some better way.  But I'm too sad to write
any serious code in this month, and I don't have access to a LoongArch
NUMA system.  So I think it's better to leave the job for you guys now
:).

Best regards

-- 
Xi Ruoyao <xry111@xxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University