linux-kernel - RE: [RFC PATCH 12/12] mm: let slab/slub/slob use mirrored memory

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F32A8D5D7@ORSMSX114.amr.corp.intel.com>
Date:	Thu, 4 Jun 2015 17:14:38 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Xishi Qiu <qiuxishi@...wei.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"nao.horiguchi@...il.com" <nao.horiguchi@...il.com>,
	Yinghai Lu <yinghai@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"mingo@...e.hu" <mingo@...e.hu>, Xiexiuqi <xiexiuqi@...wei.com>,
	Hanjun Guo <guohanjun@...wei.com>
CC:	Linux MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>
Subject: RE: [RFC PATCH 12/12] mm: let slab/slub/slob use mirrored memory

-	page = alloc_pages_exact_node(nodeid, flags | __GFP_NOTRACK, cachep->gfporder);
+	page = alloc_pages_exact_node(nodeid, flags | __GFP_NOTRACK | __GFP_MIRROR,
+					cachep->gfporder);
 
Set some global "got_mirror"[*] if we have any mirrored memory to __GFP_MIRROR, else to 0.

then
	
	page = alloc_pages_exact_node(nodeid, flags | __GFP_NOTRACK | got_mirror,
					cachep->gfporder);

-Tony

[*] Someone will suggest a better name. I'm bad at picking names.
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