On 6 Dec 2024, at 11:42, Matthew Wilcox wrote:
> On Fri, Dec 06, 2024 at 09:19:38AM -0500, Zi Yan wrote:
>> For architectures setting ARCH_HAS_CPU_CACHE_ALIASING, which requires
>> flushing cache and arc, which sets folio->flags after clearing a user
>> folio
>
> I think arc just has some legacy code left that needs to be ripped out.
> See commit d5272aaa8257 which took away ARCH_HAS_CPU_CACHE_ALIASING
> from arc.
The PG_dc_clean bit seems not to be related to cache aliasing.
See commit eacd0e950dc2 ("ARC: [mm] Lazy D-cache flush (non aliasing VIPT)")
>
> Looking at 8690bbcf3b70, I wonder if you want to use
> cpu_dcache_is_aliasing() here?
Yeah, this is more precise. Will use this in my next version. Thanks.
Best Regards,
Yan, Zi
