Re: [PATCH] dynticks: avoid flow_cache_flush() interrupting everycore

From: David Miller
Date: Wed Mar 20 2013 - 12:17:18 EST

From: Chris Metcalf <cmetcalf@xxxxxxxxxx>
Date: Tue, 19 Mar 2013 17:35:58 -0400

> Previously, if you did an "ifconfig down" or similar on one core, and
> the kernel had CONFIG_XFRM enabled, every core would be interrupted to
> check its percpu flow list for items that could be garbage collected.
> With this change, we generate a mask of cores that actually have any
> percpu items, and only interrupt those cores. When we are trying to
> isolate a set of cpus from interrupts, this is important to do.
> Signed-off-by: Chris Metcalf <cmetcalf@xxxxxxxxxx>
> ---
> This change stands alone so could be taken into the net tree if
> desired, but it is most useful in the context of Frederic Weisbecker's
> linux-dynticks work. So it could be taken up through either tree,
> but it certainly needs sign-off from someone familiar with net/core/flow.c.

I'm find with this going into the dynticks changes:

Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
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