Re: HT and idle = poll

Eric Northup (
Thu, 6 Mar 2003 17:36:17 -0500

On Thursday 06 March 2003 03:08 pm, Linus Torvalds wrote:
> On 6 Mar 2003, Alan Cox wrote:
> > idle=poll probably needs to be doing "rep nop" in a tight loop.
> We already do that. It's not enough. The HT thing will still steal cycles
> continually, since the "rep nop" is really only equivalent to a
> "sched_yield()".

(Perhaps a naive idea) Right now, there is a single "rep nop" per poll. What
happens if you unroll the loop a few times:

while (!condition) {

? I have no HT hardware so can't test this.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at