On Tue, 11 Nov 2014 21:15:39 +0100 Jan Kara <jack@xxxxxxx> wrote: > So I was looking into this but I have to say I don't understand where is > the problem. The registers clearly show that x_intercept - bdi_setpoint + 1 > == 0 (in 32-bit arithmetics). Given: > x_intercept = bdi_setpoint + span > > We have that span + 1 == 0 and that means that: > ((thresh - bdi_thresh + 8 * write_bw) * (u64)x >> 16) == -1 (again in > 32-bit arithmetics). But I don't see how that can realistically happen... > > Is this reproducible at all? > Unfortunately not. It only happened once, and I haven't been able to reproduce it again. -- Steve -- 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>