Messages in this thread | | | Subject | Re: [RFC][PATCH 00/26] sched/numa | From | Peter Zijlstra <> | Date | Mon, 19 Mar 2012 21:03:07 +0100 |
| |
On Mon, 2012-03-19 at 14:16 +0200, Avi Kivity wrote: > > Afaik we do not use dma engines for memory migration. > > We don't, but I think we should.
ISTR we (the community) had this discussion once. I also seem to remember the general consensus being that DMA engines would mostly likely not be worth the effort, although I can't really recall the specifics.
Esp. for 4k pages the setup of the offload will likely be more expensive than actually doing the memcpy.
| |