Re: [PATCH 1/5] vmscan: remove all_unreclaimable check from direct reclaim path completely

[KOSAKI Motohiro]

> On Thu, Mar 24, 2011 at 4:28 PM, KOSAKI Motohiro
> <kosaki.motohiro@xxxxxxxxxxxxxx> wrote:
> >> For example, In 4G desktop system.
> >> 32M full scanning and fail to reclaim a page.
> >> It's under 1% coverage.
> >
> > ?? I'm sorry. I haven't catch it.
> > Where 32M come from?
> 
> (1<<12) * 4K + (1<<11) + 4K + .. (1 << 0) + 4K in shrink_zones.

(lru-pages>>12) + (lru-pages>>11) + (lru-pages>>10) ... =~ 2 * lru-page 

?



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