Re: [PATCH v4] arm64/mm: Optimize loop to reduce redundant operations of contpte_ptep_get

[David Hildenbrand]

On 09.05.25 11:17, Xavier wrote:
> At 2025-05-08 16:30:14, "David Hildenbrand" <david@xxxxxxxxxx> wrote:
> > On 08.05.25 09:03, Xavier Xia wrote:
> > > This commit optimizes the contpte_ptep_get and contpte_ptep_get_lockless
> > > function by adding early termination logic. It checks if the dirty and
> > > young bits of orig_pte are already set and skips redundant bit-setting
> > > operations during the loop. This reduces unnecessary iterations and
> > > improves performance.
> > >
> > > In order to verify the optimization performance, a test function has been
> > > designed. The function's execution time and instruction statistics have
> > > been traced using perf, and the following are the operation results on a
> > > certain Qualcomm mobile phone chip:
> >
> > For the future, please don't post vN+1 as reply to vN.
>
> I will pay attention to it when I submit it later. Thank you for the reminder.

The rationale is that many people will just treat it as some discussion 
noise as part of vN and not really have a closer look, waiting for vN+1.

--
Cheers,

David / dhildenb