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Date: Fri, 22 Mar 2002 00:29:24 +0100
From: Andrea Arcangeli <andrea@suse.de>
To: Greg KH <greg@kroah.com>
Cc: Christoph Hellwig <hch@suse.de>,
        "Martin J. Bligh" <Martin.Bligh@us.ibm.com>,
        Hugh Dickins <hugh@veritas.com>, Rik van Riel <riel@conectiva.com.br>,
        Dave McCracken <dmccr@us.ibm.com>,
        linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Creating a per-task kernel space for kmap, user pagetables, et al
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On Thu, Mar 21, 2002 at 11:54:51AM -0800, Greg KH wrote:
> On Wed, Mar 20, 2002 at 11:00:02PM +0100, Andrea Arcangeli wrote:
> > But it is much faster to keep the kernel stack always in 4M global
> > tlbs, thus I don't think we need to change that in 2.5.  (also USB was
> > used to do dma in the kernel stack, not sure if they changed it
> > recently)
> 
> Hopefully all instances of the USB code doing that have now been fixed.
> If anyone sees any USB code that uses the kernel stack for USB
> transfers, please let me know so it can be fixed.
> 
> We (the USB group) have always known that this is a bug in our code, so
> don't feel you can't change things just because the USB code might be
> broken by it :)

Glad to hear, thanks!

Andrea
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