linux-kernel - Re: [RFC][PATCH] add pagesize field to /proc/pid/numa

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Message-ID: <alpine.DEB.2.02.1410201803540.2345@chino.kir.corp.google.com>
Date:	Mon, 20 Oct 2014 18:05:00 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Petr Holasek <pholasek@...hat.com>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Dave Hansen <dave.hansen@...el.com>
Subject: Re: [RFC][PATCH] add pagesize field to /proc/pid/numa_maps

On Tue, 21 Oct 2014, Petr Holasek wrote:

> There were some similar attempts to add vma's pagesize to numa_maps in the past,
> so I've distilled the most straightforward one - adding pagesize field
> expressing size in kbytes to each line. Although page size can be also obtained
> from smaps file, adding pagesize to numa_maps makes the interface more compact
> and easier to use without need for traversing other files.
> 
> New numa_maps output looks like that:
> 
> 2aaaaac00000 default file=/dev/hugepages/hugepagefile huge pagesize=2097152 dirty=1 N0=1
> 7f302441a000 default file=/usr/lib64/libc-2.17.so pagesize=4096 mapped=65 mapmax=38 N0=65
> 
> Signed-off-by: Petr Holasek <pholasek@...hat.com>

I guess the existing "huge" is insufficient on platforms that support 
multiple hugepage sizes.
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