[Pkg-samba-maint] Bug#856463: Bug#856463: Bug#856463: cifs-utils: Accessing files with length of 1067 bytes extremly slow

Mathieu Parent math.parent at gmail.com
Thu Mar 9 13:25:35 UTC 2017

2017-03-09 13:30 GMT+01:00 Stephan Gampert | GIP <stephan.gampert at gip.com>:
> Hello Mathieu,
> thank you very much for your answer.
> Unfortunately we need the symlinks, so removing the mfsymlinks option is not
> really an option for us.
> We've already tried to use jessy. We had the same problem there.
> We will test it with Debian stretch.


>  > It is because the complete file is parsed whien its size is 1067 bytes.
> ....
>  > However, the slowness is probably coming from the server side.
> I've attached a wireshark trace of a "slow read". is the
> Debian-client, is the Windows Server.
> As you can see, all seems ok from package 1-25. The file is read once
> (FID 0x009a) and is closed. I presume this is the parse for the symlink.
> The next 4 packets seem strange for me. It looks like the Debian client
> opens the file again 2 times in parallel (FID:0xc0f5 and FID 0x0017) and
> the Server is sending a lock request back to the Debian-client (which is
> not answered by the way).
> Do you expect the Debian-client to open the file again 2 times in parallel?

I can't say for sur. But this looks strange. But why is packet 34 more
than 7 seconds after packet 28?

Can you post here the debugdata and the kernel log as per:


Mathieu Parent

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