atapci0: failed to enable memory mapping!

Tue Nov 22 16:48:33 GMT 2005

I get this when I boot -stable on my Dell M70 laptop:
Nov 22 09:25:12 mdaemon kernel: atapci0: <Intel ICH6 SATA150 controller> 
port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xbfa0-0xbfaf irq 9 at device 
31.2 on pci0
Nov 22 09:25:12 mdaemon kernel: atapci0: failed to enable memory mapping!

Should memory mapping be working for that supported Intel SATA controller?
Would memory mapping increase I/O performances significantly?
Sorry if it is a dumb question

Pierre-Luc Drouin