FreeBSD + samba 2.2.2 problems; semi-solution

Simo Sorce idra at
Tue Jan 22 00:36:04 GMT 2002

Have you seen recent findings about AMD CPUs that have a bug when using 4MB pages instead of 4KB? I do not know what FreeBSD uses, but this could be a hint.

On Mon, Jan 21, 2002 at 02:26:02PM +0000, Mike Silbersack wrote:
> On Mon, 21 Jan 2002, David W. Chapman Jr. wrote:
> > > In any case the following indicates FreeBSD may already have a fix, and
> > you
> > > could try it soon:
> > >
> >
> > I believe Mike is running -current, but we do believe its a problem with
> > FreeBSD.  I on the other hand haven't really seen this problem since FreeBSD
> > 4.3.  Very Strange.
> Well, to wrap up this thread, here's what I've found:
> The TCP checksum corruption which is causing connections to stall and
> samba to hang seems to be the result of a hardware problem on my Duron
> system; if I move the harddrive with my -current installation over to the
> Celeron system, the problem goes away.  If I move the -stable harddrive
> from the Celeron over to the Duron, the problem appears.
> There is a fix for the known Via IDE data corruption bug, and it is being
> applied to my system.  However, it does not seem to fix the problem I am
> experiencing.  I've done searches, and there are no reports of similar
> corruption occuring during data transfer from a PCI NIC to the ram.
> However, since this is so subtle, others may have not analyzed the problem
> close enough to figure out what's going on.
> As for explaining how my symptoms appear to be similar to the symptoms of
> other Samba users... I suspect that others are experiencing the samba
> blocked on a read problem I was experiencing, or something similar.
> The root cause of the problem is probably different for those users, but
> the result (samba blocking endlessly) is probably the same.
> So, it looks like FreeBSD was never at fault in this situation.  Changing
> Samba so that it does not use blocking reads w/o a timeout is probably a
> good change for reliability, but it can't fix my hardware corruption
> problem.
> Mike "Silby" Silbersack

Simo Sorce       idra at
Samba Team

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