Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c

Andi Kleen
2007-08-14T21:53:39Z

On Tue, Aug 14, 2007 at 02:26:43PM -0700, Christoph Lameter wrote:
> On Tue, 14 Aug 2007, Andi Kleen wrote:
>
> > > So every spinlock would have an array of chars sized to NR_CPUS and set
> > > the flag when the lock is taken?
> >
> > I was more thinking of a single per cpu flag for all of page reclaim
> > That keeps it also cache local.
>
> We already have such a flag in the zone structure

Zone structure is not strictly CPU local so it's broader
than needed. But it might work.

-Andi