Le lundi 14 mars 2011 Ã 12:45 +0900, Simon Horman a Ãcrit : > From: Julian Anastasov <ja@xxxxxx> > > Currently, the new percpu counters are not zeroed and > the zero commands do not work as expected, we still show the old > sum of percpu values. OTOH, we can not reset the percpu counters > from user context without causing the incrementing to use old > and bogus values. > > So, as Eric Dumazet suggested fix that by moving all overhead > to stats reading in user context. Do not introduce overhead in > timer context (estimator) and incrementing (packet handling in > softirqs). > > The new ustats0 field holds the zero point for all > counter values, the rates always use 0 as base value as before. > When showing the values to user space just give the difference > between counters and the base values. The only drawback is that > percpu stats are not zeroed, they are accessible only from /proc > and are new interface, so it should not be a compatibility problem > as long as the sum stats are correct after zeroing. > > Signed-off-by: Julian Anastasov <ja@xxxxxx> > Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx> Acked-by: Eric Dumazet <eric.dumazet@xxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
