Re: v2.6.11.8 #3 and v2.6.11.8 #1 tcp_mem strangeness!

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Im pretty sure those numbers are expressed in kb, not mb. So if they are in kb 
does it still matter what the calculation is or are you trying to do some 
more tuning?

On Friday 20 May 2005 12:01 pm, Paul Griffith wrote:
> Greetings,
>
> Hardware:
> P4/2.8Ghz/1GB/40GB HDD/G4 FX5200
> Intel 865PERL
>
> 1) When I boot with v2.4.29 on my local computer tcp_mem set to the
> following: cat /proc/sys/net/ipv4/tcp_mem
> 49152   65536   98304
> (192MB)  (256MB)  (384MB)
>
> 2) When I boot the same computer with Knoppix v3.8.2 - v2.6.11.8 #3
> cat /proc/sys/net/ipv4/tcp_mem
> 196608   262144  393216
> (768MB)  (1024MB) (1536MB)
>
> 3) When I boot the same computer with Slax v5.0.5 - v2.6.11.8 #1
> cat /proc/sys/net/ipv4/tcp_mem
> 98304   131073   196608
> (384MB) (512MB)  (768MB)
>
> I can understand the change in the tcp stack from 2.4.x to 2.6.x. What
> I don't understand is why one level of the 2.6.11.8 #3 kernel will set
> my max TCP_MEM to 1.5 * MEMORY and the other 2.6.11.8 #1 sets TCP_MEM
> to .75 * MEMORY.
>
> Anyone one has any idea what is going on here???
>
> I am trying to understand the tcp stack in Linux because I have to
> tune a GigE Linux based NFS/SMB server to as our departmental fileserver.
> The server is currently using the default tcp settings on 2.4.26
> [patched to support quotas on RiserFS].
>
> Thanks
> Paul
> -
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-- 
----------------------------------------
--EB

> All is fine except that I can reliably "oops" it simply by trying to read
> from /proc/apm (e.g. cat /proc/apm).
> oops output and ksymoops-2.3.4 output is attached.
> Is there anything else I can contribute?

The latitude and longtitude of the bios writers current position, and
a ballistic missile.

                --Alan Cox LKML-December 08,2000 

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