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Date: Tue, 22 Jan 2002 02:27:51 +0100
From: Andrea Arcangeli <andrea@suse.de>
To: "David S. Miller" <davem@redhat.com>
Cc: reid.hekman@ndsu.nodak.edu, linux-kernel@vger.kernel.org, akpm@zip.com.au,
        alan@lxorg.ukuu.org
Subject: Re: Athlon PSE/AGP Bug
Message-ID: <20020122022751.P8292@athlon.random>
In-Reply-To: <20020121175410.G8292@athlon.random> <20020121.141931.105134927.davem@redhat.com> <20020122013743.M8292@athlon.random> <20020121.170745.52090023.davem@redhat.com>
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In-Reply-To: <20020121.170745.52090023.davem@redhat.com>; from davem@redhat.com on Mon, Jan 21, 2002 at 05:07:45PM -0800
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On Mon, Jan 21, 2002 at 05:07:45PM -0800, David S. Miller wrote:
>    From: Andrea Arcangeli <andrea@suse.de>
>    Date: Tue, 22 Jan 2002 01:37:43 +0100
> 
>    On Mon, Jan 21, 2002 at 02:19:31PM -0800, David S. Miller wrote:
>    > That's not true, see the ptrace() helper code.  Russell King pointed
>    > this out to me last week and it's on my TODO list to fix it up.
>    
>    Where? :) ptrace doesn't change pagetables, no need to flush any tlb in
>    ptrace.
>    
> egrep flush_*_page kernel/ptrace.c:access_process_vm()

that is not a tlb flush, it's a noop on x86 infact.

andrea@athlon:~/devel/kernel/2.4.18pre4aa1> egrep tlb kernel/ptrace.c
andrea@athlon:~/devel/kernel/2.4.18pre4aa1> 

Andrea
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