linux-kernel - Re: [PATCH v5 2/14] mm: Move replace

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Message-ID: <20100615040001.GD13800@linux.vnet.ibm.com>
Date:	Tue, 15 Jun 2010 09:30:01 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Mel Gorman <mel@....ul.ie>,
	Randy Dunlap <rdunlap@...otime.net>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Roland McGrath <roland@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Mark Wielaard <mjw@...hat.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH v5 2/14] mm: Move replace_page to mm/memory.c

> On Mon, Jun 14, 2010 at 01:58:18PM +0530, Srikar Dronamraju wrote:
> > move_replace_page.patch
> > 
> > From: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
> > 
> > Move replace_page() and write_protect_page() to mm/memory.c
> > 
> > User bkpt will use background page replacement approach to insert/delete
> > breakpoints. Background page replacement approach will be based on
> > replace_page and write_protect_page.
> > Now replace_page() loses its static attribute.
> 
> Neither of these actually gets used in this series.  So you can drop
> the patch for now.
 
replace_page() and write_protect_page() are used in write_opcode() to
insert/remove a breakpoint in the user-space breakpoint insertion layer. 
i.e "[PATCH v5 3/14] User Space Breakpoint Assistance Layer"

Even if we merge uprobes and user_bkpt layers, we would still need
write_opcode function while inserting/deleting a breakpoint.

--
Thanks and Regards
Srikar
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