linux-kernel - RE: [PATCH v5 0/5] Add movablecore

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Date:	Mon, 14 Jan 2013 22:41:03 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>
CC:	Tang Chen <tangchen@...fujitsu.com>,
	"jiang.liu@...wei.com" <jiang.liu@...wei.com>,
	"wujianguo@...wei.com" <wujianguo@...wei.com>,
	"wency@...fujitsu.com" <wency@...fujitsu.com>,
	"laijs@...fujitsu.com" <laijs@...fujitsu.com>,
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	"yinghai@...nel.org" <yinghai@...nel.org>,
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	"rob@...dley.net" <rob@...dley.net>,
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	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: RE: [PATCH v5 0/5] Add movablecore_map boot option

> hm, why.  Obviously SRAT support will improve things, but is it
> actually unusable/unuseful with the command line configuration?

Users will want to set these moveable zones along node boundaries
(the whole purpose is to be able to remove a node by making sure
the kernel won't allocate anything tricky in it, right?)  So raw addresses
are usable ... but to get them right the user will have to go parse the
SRAT table manually to come up with the addresses. Any time you
make the user go off and do some tedious calculation that the computer
should have done for them is user-abuse.

-Tony 
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