[Samba] Setting Samba Write Cache Size Can Cause File Corruption

[Volker Lendecke]

On Tue, Sep 28, 2010 at 06:15:18PM -0400, Andy Liebman wrote:
> >Well it's because this code must have a bug :-). Volker is
> >right, you should check it first with the v3-6-test git tree
> >code, as he has done some changes there that might have
> >already fixed it (if so we will back-port to 3.5.next of
> >course). If not, we'll need voluminous traces to track
> >down the exact set of writes that cause the problem.
> >Using the vfs_full_audit might initially help.
> >
> We just compiled it.  As I said, very easy to reproduce. So, we'll
> let you know what we find tomorrow with the new code.   We have
> already looked at wireshark traces and it won't be any problem to
> get you level 10 logs (if the problem still persists).  Fortunately,
> it's just 1 frame of video, so the logs won't be THAT unmanageable.

Please make sure that we get all three: strace, level10 logs
and sniff, all from the same run. We could probably work it
out with less, but this piece of code can be a bit delicate,
and all three give most information.

Thanks,

Volker