linux-kernel - Re: [PATCH] proc: task_mmu: show page size in /proc/<pid>/numa

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Message-ID: <54985C08.8080608@linux.intel.com>
Date:	Mon, 22 Dec 2014 09:59:36 -0800
From:	Dave Hansen <dave.hansen@...ux.intel.com>
To:	Rafael Aquini <aquini@...hat.com>
CC:	Johannes Weiner <hannes@...xchg.org>, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, oleg@...hat.com, rientjes@...gle.com,
	linux-mm@...ck.org, Mel Gorman <mel@....ul.ie>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [PATCH] proc: task_mmu: show page size in /proc/<pid>/numa_maps

On 12/22/2014 09:25 AM, Rafael Aquini wrote:
> Remaining question here is: should we print out 'pagesize' deliberately 
> or conditionally, only to disambiguate cases where page_size != PAGE_SIZE?

I say print it unconditionally.  Not to completely overdesign this, but
I do think we should try to at least mirror the terminology that smaps uses:

	KernelPageSize:        4 kB
	MMUPageSize:           4 kB

So definitely call this kernelpagesize.

It appears that powerpc is the only architecture where there is a
difference, and I'm not sure that this is very common at all these days.
 Do we need mmupagesize in numa_maps too?

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