Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruction in RCU. | KernelTrap

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruction in RCU.

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From: David Miller <davem@...>

To: <herbert@...>

Cc: <hadi@...>, <kaber@...>, <netdev@...>, <johannes@...>, <linux-wireless@...>

Subject: Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruction in RCU.

Date: Monday, July 21, 2008 - 11:26 am

From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 21 Jul 2008 23:22:20 +0800

quoted text> On Mon, Jul 21, 2008 at 08:09:01AM -0700, David Miller wrote:
> >
> > > Actually you've hit it on the head, as an alternative to TX hashing
> > > on the packet content, we need to allow TX queue selection based on
> > > the current CPU ID.
> > 
> > This we should avoid, it would allow reordering within a flow.
> 
> Not if the RX hashing is flow-based...

Can you control the process scheduler and where it decides
to run the processing running sendmsg() too?

That's the problem.

It is totally unwise to do CPU based TX hashing.
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Messages in current thread:

[PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruction ..., David Miller, (Thu Jul 17, 8:17 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Patrick McHardy, (Thu Jul 17, 9:03 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Fri Jul 18, 11:59 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Thu Jul 17, 9:35 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Sun Jul 20, 10:20 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Sun Jul 20, 11:35 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Sun Jul 20, 8:11 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Sun Jul 20, 10:33 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Sun Jul 20, 11:17 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Mon Jul 21, 7:14 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Mon Jul 21, 7:36 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Mon Jul 21, 7:39 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Patrick McHardy, (Thu Jul 17, 10:02 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Thu Jul 17, 6:24 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Sun Jul 20, 10:32 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Sun Jul 20, 1:20 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Patrick McHardy, (Thu Jul 17, 7:48 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Fri Jul 18, 9:10 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Roland Dreier, (Fri Jul 18, 1:10 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Sun Jul 20, 10:58 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Fri Jul 18, 9:27 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Fri Jul 18, 5:05 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Sun Jul 20, 11:16 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Sun Jul 20, 1:25 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Sun Jul 20, 6:32 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Sun Jul 20, 7:59 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Sun Jul 20, 10:20 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Mon Jul 21, 7:58 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Mon Jul 21, 1:35 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Mon Jul 21, 9:08 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Mon Jul 21, 9:19 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Mon Jul 21, 9:56 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Mon Jul 21, 9:58 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Mon Jul 21, 11:09 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Mon Jul 21, 11:22 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Mon Jul 21, 11:26 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Mon Jul 21, 12:16 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Mon Jul 21, 12:25 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Mon Jul 21, 12:43 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Mon Jul 21, 12:51 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Mon Jul 21, 1:02 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Mon Jul 21, 1:08 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Mon Jul 21, 1:11 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Fri Aug 22, 2:56 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Fri Aug 22, 9:43 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Fri Aug 22, 3:16 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Fri Aug 22, 3:41 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Fri Aug 22, 6:42 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Fri Aug 22, 9:52 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Herbert Xu, (Fri Aug 22, 6:47 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., jamal, (Mon Jul 21, 7:20 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Mon Jul 21, 12:45 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Tomas Winkler, (Sun Jul 20, 1:34 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Sun Jul 20, 1:35 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Thu Jul 17, 9:12 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Patrick McHardy, (Thu Jul 17, 9:48 am)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., David Miller, (Thu Jul 17, 6:36 pm)

Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruct..., Patrick McHardy, (Thu Jul 17, 7:58 pm)

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