Re: [PATCH v2] loongarch/mm: disable WUC for pgprot_writecombine as same as ioremap_wc

[Sui Jingfeng]

On 2024/12/18 20:43, Icenowy Zheng wrote:
> For the fact of drm/ast's dramatical drop, it's because write to the
> framebuffer can no longer be reordered.


No, your understanding is wrong, very very wrong and a big wrong.

It's not because it can't reorder the write. Rather, it's because
that the CPU can't do write gathering and can't do burst write any
more.

So do you still think your patch is harmless?


--
Best regards,
Sui