Hello, Vivek. On Mon, Jul 08, 2013 at 01:52:01PM -0400, Vivek Goyal wrote: > > Again, a problem to be fixed in the stack rather than patching up from > > up above. The right thing to do is to propagate pressure through bdi > > properly and let whatever is backing the bdi generate appropriate > > amount of pressure, be that disk or network. > > Ok, so use network controller for controlling IO rate on NFS? I had > tried it once and it did not work. I think it had problems related > to losing the context info as IO propagated through the stack. So > we will have to fix that too. But that's a similar problem we have with blkcg anyway - losing the dirtier information by the time writeback comes down through bdi. It might not be exactly the same and might need some impedance matching on the network side but I don't see any fundamental differences. Thanks. -- tejun -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>