Re: About ioremap() and L2-Cache

Alan Cox (
Fri, 25 Jul 1997 09:57:05 +0100 (BST)

> Asus' Award bios docs mention that enabling write-combining might crash
> the 'puter... Is enabling write combining supported under Linux? ;)
> (don't exactly want to set "dangerous" options in bios... 'due cmos
> changes might be one-way only in some situations...)
> [any other stuff I should know about ppro's under Linux?]

Write combining is the sort of thing you want to enable from user space as it
breaks a few video cards and works wonderously well on most. You can do this
as root under iopl(3);