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Message-ID: <1263467318.4244.289.camel@laptop>
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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