Re: [PATCH] mm: pass the pfn to set_pageblock_migratetype

[Yajun Deng]

June 3, 2024 at 9:03 PM, "Matthew Wilcox" <willy@xxxxxxxxxxxxx> wrote:



> 
> On Mon, Jun 03, 2024 at 08:41:00PM +0800, Yajun Deng wrote:
> 
> > 
> > It is necessary to calculate the pfn in the set_pageblock_migratetype(),
> > 
> >  but most of the callers already have the pfn.
> > 
> >  
> > 
> >  To reduce the calculation, pass the pfn to set_pageblock_migratetype().
> > 
> 
> It's not exactly a hard computation though. Have you done any
> 
> measurements that show this patch is an improvement?
>

No, just view the code. But some callers are in a for loop.