On Tue, Aug 14, 2007 at 02:15:12PM -0700, Christoph Lameter wrote: > On Tue, 14 Aug 2007, Andi Kleen wrote: > > > > Hmmmm... The spinlock is its own flag. > > > > Yes, but it's not CPU local. Taking the spinlock from another CPU's > > interrupt handler is perfectly safe, just not from the local CPU. > > If you use the spinlock as flag you would need to lock out everybody. > > 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. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
