Re: [PATCH 1/3] filemap: Allow __filemap_get_folio to allocate large folios

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On Sun, May 21, 2023 at 10:04:35AM +0800, Wang Yugui wrote:
> > I don't see it?
> > 
> > size == 1 << 20;
> > 
> > shift = 20;
> > return (20 - 12) << 26;
> > 
> > Looks like about 1 << 29 to me.
> 
> sorry that I wrongly
> 1) wrongly conside PAGE_SHIFT as 13 from arch/alpha/include/asm/page.h
> it should be 12 from arch/x86/include/asm/page_types.h.
> 
> 2) wrongly conside
> 	(20 - 12) << 26
> as
> 	1<< (20 - 12) << 26

Ah, no problem.  Glad I didn't miss something.



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