Re: idle=poll burns my box [was Re: 2.6.22-rc2-mm1]

[Andrew Morton]

On Fri, 25 May 2007 23:20:25 +0200 "J.A. Magallón" <jamagallon@xxxxxxx> wrote:

> Is idle=poll a quick and dirty way to burn your box in flames ?

yep ;)  It makes the CPU(s) busy-wait when they have nothing else to do.

It was originally added as a thing to maybe save a few cycles of latency
in responding to interrupts.  It's now useful as a trick to prevent oprofile
from producing confusing numbers.  I don't think it has any other uses.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/