From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Fri, 28 Mar 2008 23:25:26 +0000 (-0700)
Subject: [NET]: Add preemption point in qdisc_run
X-Git-Tag: v2.6.25-rc9~99^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ba2506ca7ca62c56edaa334b0fe61eb5eab6ab0;p=pandora-kernel.git

[NET]: Add preemption point in qdisc_run

The qdisc_run loop is currently unbounded and runs entirely in a
softirq.  This is bad as it may create an unbounded softirq run.

This patch fixes this by calling need_resched and breaking out if
necessary.

It also adds a break out if the jiffies value changes since that would
indicate we've been transmitting for too long which starves other
softirqs.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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