[NET]: Add preemption point in qdisc_run

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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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Herbert Xu 2008-03-28 16:25:26 -07:00 • committed by David S. Miller

parent 32aced7509

commit 2ba2506ca7

1 changed files with 15 additions and 3 deletions

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18

net/sched/sch_generic.c

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