On Wed, 12 Nov 2014, SeongJae Park wrote: > Difference with cma is choice and operation of 2nd-class client. In gcma, > 2nd-class client should allocate pages from the reserved area only if the > allocated pages mets following conditions. How about making CMA configurable in some fashion to be able to specify the type of 2nd class clients? Clean page-cache pages can also be rather easily evicted (see zone-reclaim). You could migrate them out when they are dirtied so that you do not have the high writeback latency from the CMA reserved area if it needs to be evicted later. -- 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>