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From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH] vmscan: synchronous lumpy reclaim don't call congestion_wait()
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> > If the system 512MB memory, DEF_PRIORITY mean 128kB scan and It takes 4096
> > shrink_page_list() calls to scan 128kB (i.e. 128kB/32=4096) memory.
> 
> Err you must forgot the page size.

page size? DEF_PRIORITY is 12.

512MB >> DEF_PRIORITY
 = 512MB / 4096
 = 128kB

128kB scan mean 4096 times shrink_list(). because one shrink_list() scan
SWAP_CLUSTER_MAX (i.e. 32).

> 
> 128kB means 128kB/4kB=32 pages which fit exactly into one
> SWAP_CLUSTER_MAX batch. The shrink_page_list() call times
> has nothing to do DEF_PRIORITY.

Umm.. I haven't catch this mention.

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