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Date:	Tue, 30 Sep 2014 01:02:52 -0400 (EDT)
From:	David Miller <>
Subject: Re: [net-next PATCH v3 1/4] net: sched: make bstats per cpu and
 estimator RCU safe

From: John Fastabend <>
Date: Sun, 28 Sep 2014 11:52:56 -0700

> From: John Fastabend <>
> In order to run qdisc's without locking statistics and estimators
> need to be handled correctly.
> To resolve bstats make the statistics per cpu. And because this is
> only needed for qdiscs that are running without locks which is not
> the case for most qdiscs in the near future only create percpu
> stats when qdiscs set the TCQ_F_CPUSTATS flag.
> Next because estimators use the bstats to calculate packets per
> second and bytes per second the estimator code paths are updated
> to use the per cpu statistics.
> Signed-off-by: John Fastabend <>

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