linux-kernel - Re: [PATCH 0/2] Dirty page tracking & on-the-fly memory mirroring

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Message-ID: <4A73CF12.4040902@nortel.com>
Date:	Fri, 31 Jul 2009 23:13:54 -0600
From:	"Chris Friesen" <cfriesen@...tel.com>
To:	Jim Paradis <jparadis@...hat.com>
CC:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] Dirty page tracking & on-the-fly memory mirroring

Jim Paradis wrote:
> Following are two patches against 2.6.31-rc3 which implement dirty page 
> tracking and on-the-fly memory mirroring.  The idea is to be able to 
> copy the entire physical memory over to another processor node or memory 
> module while the system is running.  Stratus makes use of this 
> functionality to bring a new partner node online.

We've been using something like this to mirror specific applications.
Our API is a bit different, it's per-process and lets the app specify
memory regions to monitor.  Another task sharing the memory map can
query the system for the addresses of pages that have been dirtied since
it last asked.

Chris
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