On Fri, Nov 19, 2010 at 12:29:00AM +0800, Peter Zijlstra wrote: > On Fri, 2010-11-19 at 00:06 +0800, Wu Fengguang wrote: > > On Fri, Nov 19, 2010 at 12:02:01AM +0800, Peter Zijlstra wrote: > > > On Thu, 2010-11-18 at 23:44 +0800, Wu Fengguang wrote: > > > > + pause = HZ * pages_dirtied / (bw + 1); > > > > > > Shouldn't that be using something like div64_u64 ? > > > > OK, but a dumb question: gcc cannot handle this implicitly? > > it could, but we chose not to implement the symbol it emits for these > things so as to cause pain.. that was still assuming the world of 32bit > computing was relevant and 64bit divides were expensive ;-) Good to know that, thanks! So let's avoid it totally :) -- 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/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>