Hi.

I've remade my patch for the latest -ac release. It is the
radix-tree pagecache patch with the fixes recommended by
Andrew Morton. It should apply cleanly to 2.4.19-pre4-ac4.
Enjoy!

Art Haas
-- 
They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety.
 -- Benjamin Franklin, Historical Review of Pennsylvania, 1759