On Mon, 2011-08-08 at 19:07 +0800, Konstantin Khlebnikov wrote: > Logic added in commit v2.6.30-5507-g8cab475 > (vmscan: make mapped executable pages the first class citizen) > was noticeably weakened in commit v2.6.33-5448-g6457474 > (vmscan: detect mapped file pages used only once) > > Currently these pages can become "first class citizens" only after second usage. > > After this patch page_check_references() will activate they after first usage, > and executable code gets yet better chance to stay in memory. > > TODO: > run some cool tests like in v2.6.30-5507-g8cab475 =) I used to post a similar patch here: http://marc.info/?l=linux-mm&m=128572906801887&w=2 but running Fengguang's test doesn't show improvement. And actually the VM_EXEC protect in shrink_active_list() doesn't show improvement too in my run, I'm wondering if we should remove it. I guess the (vmscan: detect mapped file pages used only once) patch makes VM_EXEC protect lose its effect. It's great if you can show solid data. Thanks, Shaohua -- 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>