linux-kernel - Re: [PATCH v2 2.6.38-rc8-tip 3/20] 3: uprobes: Breakground page replacement.

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Message-ID: <1300126895.9910.127.camel@gandalf.stny.rr.com>
Date:	Mon, 14 Mar 2011 14:21:35 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Linux-mm <linux-mm@...ck.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Andi Kleen <andi@...stfloor.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Oleg Nesterov <oleg@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Roland McGrath <roland@...k.frob.com>,
	SystemTap <systemtap@...rces.redhat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2 2.6.38-rc8-tip 3/20]  3: uprobes: Breakground page
 replacement.

On Mon, 2011-03-14 at 22:54 +0530, Srikar Dronamraju wrote:
> > 
> > I'm also curious to why we can't modify text code that is also mapped as
> > read/write.
> > 
> 
> If text code is mapped read/write then on memory pressure the page gets
> written to the disk. Hence breakpoints inserted may end up being in the
> disk copy modifying the actual copy.
> 
> 
OK, could you put a comment about that too.

Thanks,

-- Steve


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