| To: | Andrea Arcangeli <andrea@xxxxxxx> |
|---|---|
| Subject: | Re: route cache DoS testing and softirqs |
| From: | "David S. Miller" <davem@xxxxxxxxxx> |
| Date: | Tue, 30 Mar 2004 14:22:10 -0800 |
| Cc: | kuznet@xxxxxxxxxxxxx, dipankar@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx, Robert.Olsson@xxxxxxxxxxx, paulmck@xxxxxxxxxx, akpm@xxxxxxxx |
| In-reply-to: | <20040330213742.GL3808@xxxxxxxxxxxxxxxxx> |
| References: | <20040329222926.GF3808@xxxxxxxxxxxxxxxxx> <200403302005.AAA00466@xxxxxxxxxxxxxxx> <20040330211450.GI3808@xxxxxxxxxxxxxxxxx> <20040330133000.098761e2.davem@xxxxxxxxxx> <20040330213742.GL3808@xxxxxxxxxxxxxxxxx> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
On Tue, 30 Mar 2004 23:37:42 +0200 Andrea Arcangeli <andrea@xxxxxxx> wrote: > that means nothing runs in ksoftirqd for Dipankar, so he cannot be using > NAPI. > > Either that or I'm misreading his numbers, or his stats results are wrong. If these numbers are with your "if (ksoftirqd_pending()) return;" thing at the top of do_softirq() then I must agree with you. Otherwise, keep in mind what I said, and also as Robert mentioned every single local_bh_enable() is going to call do_softirq() if the count falls to zero. |
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