linux-kernel - Re: [RFC] [PATCH 3/7] Execution out of line (XOL)

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Date:	Thu, 14 Jan 2010 12:08:38 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	utrace-devel <utrace-devel@...hat.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Maneesh Soni <maneesh@...ibm.com>,
	Mark Wielaard <mjw@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] [PATCH 3/7] Execution out of line (XOL)

On Mon, 2010-01-11 at 17:55 +0530, Srikar Dronamraju wrote:
> Execution out of line (XOL)
> 
> Slot allocation mechanism for Execution Out of Line strategy in User
> space breakpointing Inftrastructure. (XOL)
> 
> This patch provides slot allocation mechanism for execution out of
> line strategy for use with user space breakpoint infrastructure.
> This patch requires utrace support in kernel.
> 
> This patch provides five functions xol_get_insn_slot(),
> xol_free_insn_slot(), xol_put_area(), xol_get_area() and
> xol_validate_vaddr().
> 
> Current slot allocation mechanism:
> 1. Allocate one dedicated slot per user breakpoint.
> 2. If the allocated vma is completely used, expand current vma.
> 3. If we cant expand the vma, allocate a new vma.


Say what?

I see the text, but non of it makes any sense at all.

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