[Samba] SMB slow by design?

[Edmundo Valle Neto]

Jeremy Allison escreveu:
> On Sat, Jan 27, 2007 at 11:35:32PM +0100, Jan Engelhardt wrote:
>   
>> Ah I found it. This is smb.conf: http://pastebin.ca/330452
>> Removing SO_SNDBUF=8192 gives
>>
>> $ smbget smb://localhost/rt/blob.iso
>> [blob.iso] 41.08Mb of 171.06Mb (24.01%) at 41.08Mb/s ETA: 00:00:03
>>
>> perfect performance again. Wonder how that got in there *grumble*
>>     
>
> Yep, on modern kernels I don't think setting SNDBUF or RCVBUF is
> a good idea....
>
> Jeremy.
>   


Can you explain that a little better? Why is that good for older kernels 
and not for new ones? And what do you call modern kernels, any 2.6 kernel?

Regards.

Edmundo