From: John Heffner <jheffner@psc.edu>
To: David Miller <davem@davemloft.net>
Cc: ilpo.jarvinen@helsinki.fi, netdev@vger.kernel.org,
herbert@gondor.apana.org.au
Subject: Re: TSO trimming question
Date: Thu, 20 Dec 2007 11:02:21 -0500 [thread overview]
Message-ID: <476A920D.6020401@psc.edu> (raw)
In-Reply-To: <20071220.035621.147230372.davem@davemloft.net>
David Miller wrote:
> From: "Ilpo_Järvinen" <ilpo.jarvinen@helsinki.fi>
> Date: Thu, 20 Dec 2007 13:40:51 +0200 (EET)
>
>> [PATCH] [TCP]: Fix TSO deferring
>>
>> I'd say that most of what tcp_tso_should_defer had in between
>> there was dead code because of this.
>>
>> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
>
> Yikes!!!!!
>
> John, we've been living a lie for more than a year. :-/
>
> On the bright side this explains a lot of small TSO frames I've been
> seeing in traces over the past year but never got a chance to
> investigate.
Ouch. This fix may improve some benchmarks.
Re-checking this function was on my list of things to do because I had
also noticed some TSO frames that seemed a bit small. This clearly
explains it.
-John
next prev parent reply other threads:[~2007-12-20 16:02 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-19 21:46 TSO trimming question Ilpo Järvinen
2007-12-19 22:02 ` Ilpo Järvinen
2007-12-20 3:26 ` Herbert Xu
2007-12-20 7:55 ` David Miller
2007-12-20 7:54 ` David Miller
2007-12-20 11:40 ` Ilpo Järvinen
2007-12-20 11:56 ` David Miller
2007-12-20 16:02 ` John Heffner [this message]
2007-12-21 4:36 ` David Miller
2007-12-21 8:06 ` Bill Fink
2007-12-21 9:26 ` Ilpo Järvinen
2007-12-21 9:28 ` Ilpo Järvinen
2007-12-21 9:27 ` David Miller
2007-12-21 9:29 ` Herbert Xu
2007-12-21 9:36 ` David Miller
2007-12-21 10:58 ` Bill Fink
2007-12-21 18:54 ` Bill Fink
2007-12-21 18:58 ` Ilpo Järvinen
2007-12-21 19:37 ` Bill Fink
2007-12-20 12:00 ` David Miller
2007-12-20 12:35 ` Ilpo Järvinen
2007-12-20 14:00 ` Herbert Xu
2007-12-20 23:55 ` David Miller
2007-12-21 18:55 ` [PATCH] [TCP]: Force TSO splits to MSS boundaries Ilpo Järvinen
2007-12-21 20:01 ` Ilpo Järvinen
2007-12-25 5:35 ` David Miller
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