On 07/25/2014 08:06 AM, Wilco Dijkstra wrote: > Is there a reason Linux does not do background page clearing like other OSes to reduce this > overhead? It would be a good fit for typical mobile workloads (bursts of high activity followed by > periods of low activity). If the page is being allocated, it is about to be used and be brought in to the CPU's cache. If we zero it close to this use, we only pay to bring it in to the CPU's cache once. Or so goes the theory... I tried a zero-on-free implementation a year or so ago. It helped some workloads and hurt others. The gains were not large enough or widespread enough to merit pushing it in to the kernel. -- 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>