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From: Andi Kleen <ak@suse.de>
To: David Miller <davem@davemloft.net>
Cc: herbert@gondor.apana.org.au, kazunori@miyazawa.org,
	yoshfuji@linux-ipv6.org, netdev@vger.kernel.org,
	usagi-core@linux-ipv6.org
Subject: Re: Regarding offloading IPv6 addrconf and ndisc
Date: Tue, 1 Aug 2006 02:31:58 +0200	[thread overview]
Message-ID: <200608010231.58339.ak@suse.de> (raw)
In-Reply-To: <20060727.183415.104032934.davem@davemloft.net>


> If we process these in sequence in software interrupt, everything
> is fine.  Processing of "A" will add the address, and the test
> ping packet "B" will respond properly.
> 
> If you defer "A", everything breaks and the test packet "B" will
> get processed first and not work.

Playing devil's advocate here: if the packets are processed on
two different CPUs then this could also happen and break the test
case.

So the test is probably a bit fragile.

Currently it is unlikely to happen because of interrupt affinity for a 
single device,  but in future with MSI-X support it might not.

I generally agree it's better to keep this in kernel though.

-Andi

  parent reply	other threads:[~2006-08-01  0:32 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-07-27 11:25 Regarding offloading IPv6 addrconf and ndisc Hugo Santos
2006-07-27 12:25 ` Kazunori Miyazawa
2006-07-27 17:56   ` Hugo Santos
2006-07-27 23:56   ` Herbert Xu
2006-07-28  1:34     ` David Miller
2006-07-28  1:45       ` Hugo Santos
2006-07-28  2:27         ` David Miller
2006-07-28  3:13           ` Hugo Santos
2006-07-28  3:20             ` David Miller
2006-07-28  3:31               ` Hugo Santos
2006-07-28  4:07                 ` Stephen Hemminger
2006-07-28  8:34                   ` Hugo Santos
2006-07-28 12:45                     ` Jamal Hadi Salim
2006-07-29 13:34                       ` Hugo Santos
2006-07-30  3:28                         ` Kazunori Miyazawa
2006-07-30 11:30                           ` Hugo Santos
2006-07-31 21:23                             ` David Miller
2006-08-01 11:50                               ` Hugo Santos
2006-08-01 21:54                                 ` David Miller
2006-08-01  0:16                             ` Kazunori Miyazawa
2006-07-28  2:22       ` Herbert Xu
2006-07-28  2:33         ` David Miller
2006-08-01  0:31       ` Andi Kleen [this message]
2006-08-01  0:46         ` David Miller
2006-08-01  0:49           ` Roland Dreier
2006-08-01  1:24             ` Jamal Hadi Salim
2006-08-01  1:30               ` Herbert Xu
2006-08-01  1:47                 ` Jamal Hadi Salim
2006-08-01 12:13                   ` Hugo Santos
2006-08-01 12:00           ` Hugo Santos
2006-08-01 21:57             ` David Miller
2006-08-03 13:28               ` Ingo Oeser

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