read/write multiplexed support

Jeremy Allison jra at
Fri May 15 00:32:32 GMT 2009

On Fri, May 15, 2009 at 02:05:09AM +0200, Marcel Müller wrote:
> I just discovered that samba 3.2.x does no longer support the TRANS2  
> commands readBmpx and writeBmpx. This causes OS/2 (and eConStation)  
> clients to have extremely poor performance when connecting to a samba  
> server. I am talking about 2.5MB/s over switched 100baseT in read and  
> write direction. Reading from Samba 3.0.24 is about 8MB/s with the same  
> setup.

readBmpx and writeBmpx are not trans2 call, but standard SMB calls.
No Windows client ever emitted them over a TCP (stream) connection.
Even in Samba3.0 readbmpx is disabled by default. Are you sure these
are the calls you're seeing ? So you have a wireshark trace of this ?

Do you have "read bmpx = true" set in your smb.conf ?


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