Ron Maeder wrote:
> On Fri, 28 May 2004, Rik van Riel wrote:
> 
>> On Tue, 25 May 2004, Ron Maeder wrote:
>>
>>> Is this an "undocumented feature" or is this a linux error?  I would
>>> expect pages of the mmap()'d file would get paged back to the original
>>> file. I know this won't be fast, but the performance is not an issue for
>>> this application.
>>
>>
>> It looks like a kernel bug.  Can you reproduce this problem
>> with the latest 2.6 kernel or is it still there ?
>>
>> Rik
> 
> 
> I was able to reproduce the problem with the code that I posted on a 2.6.6
> kernel.
> 

Can you give this NFS patch (from Trond) a try please?

(I don't think it is a very good idea for NFS to be using
WRITEPAGE_ACTIVATE here. If NFS needs to have good write
clustering off the end of the LRU, we need to go about it
some other way.)