From: Eric Dumazet <edumazet@google.com>
Date: Thu, 24 Jul 2014 04:36:50 +0000 (+0200)
Subject: netfilter: xt_hashlimit: perform garbage collection from process context
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~149^2~44^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7bd8490eef9776ced7632345df5133384b6be0fe;p=pandora-kernel.git

netfilter: xt_hashlimit: perform garbage collection from process context

xt_hashlimit cannot be used with large hash tables, because garbage
collector is run from a timer. If table is really big, its possible
to hold cpu for more than 500 msec, which is unacceptable.

Switch to a work queue, and use proper scheduling points to remove
latencies spikes.

Later, we also could switch to a smoother garbage collection done
at lookup time, one bucket at a time...

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Florian Westphal <fw@strlen.de>
Cc: Patrick McHardy <kaber@trash.net>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

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