>>>>> "Christoph" == Christoph Lameter <cl@xxxxxxxxx> writes: Christoph> On Wed, 11 Jan 2012, John Stoffel wrote: KOSAKI> so, we can eat free lunch up to 7MB ~= 60(MB/sec) * 1000 / 8.5(ms). >> >> What if the disk is busy doing other writeout or readin during this >> time? You can't assume you have the full disk bandwidth available, >> esp when you hit a swap storm like this. Christoph> The assumptions by Kosaki are quite conservative. Just checking Christoph> What if one did not get a disk from the garbage heap but Christoph> instead has a state of the art storage cluster or simply an Christoph> SSD (in particular relevant now since HDs are in short Christoph> supply given the situation in Asia)? I don't know, I was just trying to make sure he thinks about disks which are slower than he expects, since there are lots of them still out there. John -- 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>