Hi, On Wed, Jul 06, 2011 at 02:01:03AM -0700, Andrew Morton wrote: > On Tue, 5 Jul 2011 13:52:34 +0530 Ankita Garg <ankita@xxxxxxxxxx> wrote: > > > > > This patch series is an instrumentation/debug infrastructure that captures > > the memory reference pattern of applications (workloads). > > Can't the interfaces described in Documentation/vm/pagemap.txt be used > for this? The pagemap interface does not closely track the hardware reference bit of the pages. The 'REFERENCED' flag maintained in /proc/kpageflags only indicates if the page has been referenced since last LRU list enqueue/requeue. So estimating the rate at which a particular page of memory is referenced cannot be obtained. Further, it does not provide information on the amount of kernel memory referenced on behalf of the process. -- Regards, Ankita Garg (ankita@xxxxxxxxxx) Linux Technology Center IBM India Systems & Technology Labs, Bangalore, India -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>