On Fri, 2010-04-30 at 08:59 -0700, Dan Magenheimer wrote: > Dave or others can correct me if I am wrong, but I think CMM2 also > handles dirty pages that must be retained by the hypervisor. The > difference between CMM2 (for dirty pages) and frontswap is that > CMM2 sets hints that can be handled asynchronously while frontswap > provides explicit hooks that synchronously succeed/fail. Once pages were dirtied (or I guess just slightly before), they became volatile, and I don't think the hypervisor could do anything with them. It could still swap them out like usual, but none of the CMM-specific optimizations could be performed. CC'ing Martin since he's the expert. :) -- Dave -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>