Re: [RFC PATCH] mm: remove quicklist page table caches

Nicholas Piggin
2019-07-11T10:33:03Z

Michal Hocko's on July 11, 2019 6:25 pm:
> On Thu 11-07-19 13:03:39, Nicholas Piggin wrote:
>> Remove page table allocator "quicklists". These have been around for a
>> long time, but have not got much traction in the last decade and are
>> only used on ia64 and sh architectures.
>>
>> The numbers in the initial commit look interesting but probably don't
>> apply anymore. If anybody wants to resurrect this it's in the git
>> history, but it's unhelpful to have this code and divergent allocator
>> behaviour for minor archs.
>>
>> Also it might be better to instead make more general improvements to
>> page allocator if this is still so slow.
>
> Agreed. And if that is not possible for whatever reason then we have a
> proper justification for the revert at least.
>
> Acked-by: Michal Hocko <mhocko@suse.com>

Thanks. If it's agreed with ia64 and sh maintainers, I can send
individual patches through their trees, then the removal patch
will be functionally a nop that can be easily pushed through.

Thanks,
Nick