netdev - Re: TCP connection stops after high load.

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Message-ID: <7e63f56c0704170058m35d44a8ajfe5d97c4c7a8d87a@mail.gmail.com>
Date:	Tue, 17 Apr 2007 10:58:04 +0300
From:	"Robert Iakobashvili" <coroberti@...il.com>
To:	"David Miller" <davem@...emloft.net>
Cc:	jheffner@....edu, netdev@...r.kernel.org, greearb@...delatech.com,
	"Michael Moser" <moser.michael@...il.com>
Subject: Re: TCP connection stops after high load.

David,

On 4/16/07, David Miller <davem@...emloft.net> wrote:
> > > Commit: 53cdcc04c1e85d4e423b2822b66149b6f2e52c2c
> > > Author: John Heffner <jheffner@....edu> Fri, 16 Mar 2007 15:04:03 -0700
> > >
> > >      [TCP]: Fix tcp_mem[] initialization.
> > >      Change tcp_mem initialization function.  The fraction of total memory
> > >      is now a continuous function of memory size, and independent of page
> > >      size.
> >
> >
> > Kernels 2.6.19 and 2.6.20 series are effectively broken right now.
> > Don't you wish to patch them?
>
> Can you verify that this patch actually fixes your problem?

Yes, it fixes.

After the patch curl-loader works with patched 2.6.19.7 and
with patched 2.6.20.7 using simulteneous 3000 local connections smothly,
and even better than with referred as a "good" 2.6.18.3.


Besides that the tcp_mem status for my machine:

kernel                             tcp_mem
------------------------------------------------------
2.6.19.7                     3072    4096     6144
2.6.19.7-patched    45696   60928   91392
2.6.20.7                     3072    4096     6144
2.6.20.7-patched    45696   60928   91392

The patch was applied smothly just with line offsets.

-- 
Sincerely,
Robert Iakobashvili,
coroberti %x40 gmail %x2e com
...................................................................
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