Re: [PATCH] Hugepages should be accounted as unevictable pages.

From: KAMEZAWA Hiroyuki
Date: Tue Jun 23 2009 - 01:13:35 EST

On Tue, 23 Jun 2009 14:05:47 +0900 (JST)
KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> wrote:
> I'm not sure this unevictable definition is good idea or not. currently
> hugepage isn't only non-account memory, but also various kernel memory doesn't
> account.
> one of drawback is that zone_page_state(UNEVICTABLE) lost to mean #-of-unevictable-pages.
> e.g. following patch is wrong?
> fs/proc/meminfo.c meminfo_proc_show()
> ----------------------------
> - K(pages[LRU_UNEVICTABLE]),
> + K(pages[LRU_UNEVICTABLE]) + hstate->nr_huge_pages,
> Plus, I didn't find any practical benefit in this patch. do you have it?
> or You only want to natural definition?
> I don't have any strong oppose reason, but I also don't have any strong
> agree reason.
I think "don't include Hugepage" is sane. Hugepage is something _special_, now.


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