Re: still nfs problems [Was: Linux 2.6.37-rc8]

[Marc Kleine-Budde]

On 01/09/2011 12:15 AM, Trond Myklebust wrote:
> From 8b2e60cef5c65eef41ab61286f62dec6bfb1ac27 Mon Sep 17 00:00:00 2001
> From: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
> Date: Sat, 8 Jan 2011 17:45:38 -0500
> Subject: [PATCH] NFS: Don't use vm_map_ram() in readdir
> 
> vm_map_ram() is not available on NOMMU platforms, and causes trouble
> on incoherrent architectures such as ARM when we access the page data
> through both the direct and the virtual mapping.
> 
> The alternative is to use the direct mapping to access page data
> for the case when we are not crossing a page boundary, but to copy
> the data into a linear scratch buffer when we are accessing data
> that spans page boundaries.
> 
> Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
Tested-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>

..on AT91 (armv5)

regards, Marc

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