linux-kernel - Re: [patch] x86, ptrace: support pebs in ds.c and disable ptraceand ds support

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Date:	Thu, 27 Mar 2008 11:16:03 +0100
From:	"stephane eranian" <eranian@...glemail.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Metzger, Markus T" <markus.t.metzger@...el.com>, ak@...e.de,
	hpa@...or.com, linux-kernel@...r.kernel.org, tglx@...utronix.de,
	markus.t.metzger@...il.com,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>, roland@...hat.com,
	akpm@...ux-foundation.org, mtk.manpages@...il.com,
	"Villacis, Juan" <juan.villacis@...el.com>
Subject: Re: [patch] x86, ptrace: support pebs in ds.c and disable ptraceand ds support

Hello,

What is the user-level API of utrace?

Does this user interface come in addition to ptrace or as a replacement?
What is the impact on existing applications, such as debuggers?


On Thu, Mar 27, 2008 at 10:58 AM, Ingo Molnar <mingo@...e.hu> wrote:
>
>  * Metzger, Markus T <markus.t.metzger@...el.com> wrote:
>
>  > > we could apply this if Roland Acks it - but i guess a precondition
>  > > for that is to not include more ptrace extensions and to also start
>  > > working on utrace support for it. Ptrace is something we want to
>  > > reduce usage of, not extend.
>  >
>  > The patch is not adding new features. It is merely re-establishing the
>  > state before the patch mysteriously disappeared from x86#testing.
>
>  well, Roland is the de-facto ptrace maintainer and he has NAK-ed the
>  current approach of extending ptrace, so i removed the patch. Is there
>  anything particularly wrong about doing this based on utrace? The API
>  will hit upstream in 2.6.26 or 2.6.27.
>
>         Ingo
>
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