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Date: Mon, 16 Jun 2008 20:21:48 +0200 From: Jesper Krogh <jesper@...gh.cc> To: Matheos Worku <Matheos.Worku@....COM> CC: David Miller <davem@...emloft.net>, yhlu.kernel@...il.com, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: NIU - Sun Neptune 10g - Transmit timed out reset (2.6.24) Matheos Worku wrote: > David Miller wrote: > >> From: Matheos Worku <Matheos.Worku@....COM> >> Date: Thu, 29 May 2008 17:14:29 -0700 >> >> >> >>> Actually what I am suggesting was a workaround for the lack of "TX >>> Ring Empty" interrupt by not relying on the TX interrupt at all. >>> >> >> Ahh I see. >> >> Some of the things I talked about in my presentation here in >> Berlin at LinuxTAG yesterday can help mitigate the effects. >> Most of it revolves around batching, and allowing the driver >> to manage the backlog of packets directly when the TX queue >> fills up. >> >> In such a case we could batch the TX queue refill, know how many more >> TX packets we will queue up to the chip right now, and therefore know >> that we can safely set periodic MARK bits and only need to force set >> the MARK bit at the very end. >> >> >> >>> As for the TX hang, I will try to reproduce the problem and look at >>> the registers for the clue. >>> > Have been trying but not able to reproduce the timeout. I am using NFS > V3 with TCP. Are you using UDP by any chance? I wouldn't say it is easy either.. I have never got it before getting a few TB over the "wire". I've got proto=tcp in /proc/mounts for the mountpoints, so I'd assume that I use TCP. There is an Extreme Networks switch in the other end, I havent got hardware to actually test that with a different card, so I cannot rule the switch out either. .. but it would be strange. Jesper -- Jesper -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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