Yes, I think that must be the safest solution. Any kernel routine which uses PREF instructions (but actually also user space code as Ralf's example pointed out), must guarantee that it does not issue prefetches to addresses which it is not specifically being asked to mess around with. The other solutions seem too fragile, and will break at some point. /Hartvig Alan Cox writes: > > On Fri, 2002-10-04 at 13:35, Carsten Langgaard wrote: > > That's exactly the problem. > > The actually loads and stores in memcpy is fine, it's the prefetching that > > prefetch too much. > > Then fix your prefetching code 8). We had problems with that on x86 too, > prefetching off the last page into ISA space -> death. Was umm fun to > debug > > > -- _ _ _____ ____ Hartvig Ekner Mailto:hartvige@mips.com |\ /| | |____)(____ Direct: +45 4486 5503 | \/ | | | _____) MIPS Denmark Switch: +45 4486 5555 T E C H N O L O G I E S http://www.mips.com Fax...: +45 4486 5556
