linux-kernel - Re: [PATCH 2/7] ksm: treat unstable nid like in stable tree

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Message-ID: <alpine.LNX.2.00.1303052024570.29433@eggly.anvils>
Date:	Tue, 5 Mar 2013 20:31:16 -0800 (PST)
From:	Hugh Dickins <hughd@...gle.com>
To:	Will Huck <will.huckk@...il.com>
cc:	Ric Mason <ric.masonn@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>,
	Petr Holasek <pholasek@...hat.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Izik Eidus <izik.eidus@...ellosystems.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 2/7] ksm: treat unstable nid like in stable tree

On Wed, 6 Mar 2013, Will Huck wrote:
> 
> How ksm treat a ksm forked page? IIUC, it's not merged in ksm stable tree. It
> will just be ignore?

No, it's there in the stable tree, as it was before it got forked.  And
when ksmd comes around to find the new mm, it will allocate an rmap_item
for that page in the new mm, and append it to the existing stable_node.

Hugh
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