On Tue, 2011-01-25 at 12:47 -0800, Andi Kleen wrote: > > I thought the reason for the preempt off inside the mmu gather region was > to stay on the same CPU for local/remote flushes. How would it change that? afaik its been preempt-off solely because it was always inside a number of spinlocks, I know both Hugh and BenH worked on making it preemptible far before I started this. I remember Hugh and Nick talking about this at OLS'06 or 07, can't really remember. As to local/remote flushes, there is no real saying where the pages came from due to on-demand paging and the scheduler never having had a notion of home-node. Therefore freeing them wouldn't be more of less local if that is exposed to the same migration as allocation was. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href