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Date: Mon, 21 Dec 2009 19:20:43 +0530
From: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
       Alexey Dobriyan <adobriyan@gmail.com>, Andi Kleen <andi@firstfloor.org>,
       Christoph Hellwig <hch@infradead.org>,
       "Frank Ch. Eigler" <fche@redhat.com>, Ingo Molnar <mingo@elte.hu>,
       Peter Zijlstra <peterz@infradead.org>,
       Roland McGrath <roland@redhat.com>, linux-kernel@vger.kernel.org,
       utrace-devel@redhat.com
Subject: Re: [PATCH 6/7] implement utrace-ptrace
Message-ID: <20091221135043.GC12670@in.ibm.com>
Reply-To: ananth@in.ibm.com
References: <20091218011140.GA29570@redhat.com> <20091221134837.GB12670@in.ibm.com>
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On Mon, Dec 21, 2009 at 07:18:37PM +0530, Ananth N Mavinakayanahalli wrote:
> On Fri, Dec 18, 2009 at 02:11:40AM +0100, Oleg Nesterov wrote:
> > The patch adds the new file, kernel/ptrace-utrace.c, which contains
> > the new implementation of ptrace over utrace.
> > 
> > This file is not compiled until we have CONFIG_UTRACE option, will be
> > added by the next "utrace core" patch.
> > 
> > It's supposed to be an invisible implementation change, nothing should
> > change to userland when CONFIG_UTRACE is enabled.
> > 
> > Signed-off-by: Roland McGrath <roland@redhat.com>
> > Signed-off-by: Oleg Nesterov <oleg@redhat.com>
> > ---
> 
> Oleg,
> 
> ptrace/utrace performs better with the ptrace-tests [1] testsuite (1 failure
> vs. 3 with vanilla ptrace [1]). The gdb testsuite also has no
> regressions. In fact, the results on the gdb testsuite are identical.

Forgot to mention the tests were on powerpc.