linux-kernel - Re: [PATCH 1/5] mm: add numa node symlink for memory section in sysfs

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Message-ID: <20091021182711.GI23948@ldl.fc.hp.com>
Date:	Wed, 21 Oct 2009 12:27:11 -0600
From:	Alex Chiang <achiang@...com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	akpm@...ux-foundation.org, linux-mm@...ck.org,
	Ingo Molnar <mingo@...e.hu>, Gary Hade <garyhade@...ibm.com>,
	Badari Pulavarty <pbadari@...ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] mm: add numa node symlink for memory section in
	sysfs

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>:
> Alex Chiang wrote:
> > Commit c04fc586c (mm: show node to memory section relationship with
> > symlinks in sysfs) created symlinks from nodes to memory sections, e.g.
> >
> > /sys/devices/system/node/node1/memory135 -> ../../memory/memory135
> >
> > If you're examining the memory section though and are wondering what
> > node it might belong to, you can find it by grovelling around in
> > sysfs, but it's a little cumbersome.
> >
> > Add a reverse symlink for each memory section that points back to the
> > node to which it belongs.
> >
> > Cc: Gary Hade <garyhade@...ibm.com>
> > Cc: Badari Pulavarty <pbadari@...ibm.com>
> > Cc: Ingo Molnar <mingo@...e.hu>
> > Signed-off-by: Alex Chiang <achiang@...com>
> 
> 2 yeas ago, I wanted to add this symlink. But don't...because
> some vendor's host has no 1-to-1 relationship between a memsection
> and a node. (I don't remember precisely, sorry....s390?)

Hm, ok. I'll cc the s390 folks in the next version of this series.

Thanks for the pointer.

/ac

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