Re: [PATCH -tip-rcu] Make rcutorture more vicious: invoke RCU readers from irq handlers (timers)

Ingo Molnar
2008-06-26T07:27:27Z

* Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:

> This patch allows torturing RCU from irq handlers (timers, in this
> case). A new module parameter irqreader enables such additional
> torturing, and is enabled by default. Variants of RCU that do not
> tolerate readers being called from irq handlers (e.g., SRCU) ignore
> irqreader.
>
> (No failures observed, but only short tests thus far. And no failures
> observed thus far from about 10 hours of running stock rcutorture in
> parallel with 170 kernel builds on a two-CPU machine.)

applied to tip/core/rcu - thanks Paul.

> +static int irqreader = 1; /* RCU readers from irq (timers). */

Good - this means that in bzImage type of tests (built-in rcutorture, no
modules) this new test variant will be activated by default, right?

Ingo