According to Trond, there is an NFS/LFS
page cache bug.
Created attachment 28422 [details]
A message with a patch.
Created attachment 28424 [details]
Updated patch for support 64bit hosts
Created attachment 28425 [details]
Fix a typo
Created attachment 28426 [details]
Really support 64bit hosts, I hope :-)
This appears to have been fixed in later kernels