On Mon, Mar 28, 2011 at 04:58:50PM -0700, Andi Kleen wrote: > Dave Chinner <david@xxxxxxxxxxxxx> writes: > > > > First it would be useful to determine why the VM is reclaiming so > > much memory. If it is somewhat predictable when the excessive > > reclaim is going to happen, it might be worth capturing an event > > Often it's to get pages of a higher order. Just tracing alloc_pages > should tell you that. Yes, the kmem/mm_page_alloc tracepoint gives us that. But in case that is not the cause, grabbing all the trace points I suggested is more likely to indicate where the problem is. I'd prefer to get more data than needed the first time around than have to do multiple round trips because a single trace point doesn't tell us the cause... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
