smbfs/cifs mounts in fstab causing ethernet interface lockups

Edsall, William (WJ) WJEdsall at dow.com
Fri Oct 29 11:06:43 MDT 2010


Two scenarios where this is happening:

2.6.18-164.6.1.el5 -- Centos 5.4 64 bit via rocks
 and
2.6.22.5-31-default -- Suse 10.3 64 bit

-----Original Message-----
From: Jeff Layton [mailto:jlayton at poochiereds.net] On Behalf Of Jeff
Layton
Sent: Friday, October 29, 2010 1:04 PM
To: Edsall, William (WJ)
Cc: samba-technical at lists.samba.org
Subject: Re: smbfs/cifs mounts in fstab causing ethernet interface
lockups

On Fri, 29 Oct 2010 12:52:19 -0400
"Edsall, William (WJ) " <WJEdsall at dow.com> wrote:

> 
> > Hello samba list,
> >  I'm experiencing a strange issue with smbfs mounts. Please help me
> > troubleshoot this as it is locking up some of our servers.
> > 
> > I have the following mount in fstab:
> > //servername/remote_folder  /local_folder  cifs   username=<user
> > here>,password=<pass here>uid=12427,gid=4400  0       0
> > 
> > The purpose is to mount a remote directory for a custom application.
> > Smbfs mounts were chosen for a specific reason over NFS mountss.
> > 
> > What's happening is, every so often due to unknown circumstances,
this
> > mount will become unavailable and will entirely lock-up the ethernet
> > interface using it. For our clusters it's the public interface --
the
> > private will still be available.
> > 
> > After a lazy unmount of the smbfs mount, the interface is
immediately
> > available.
> > 
> > How can I make this mount more friendly so that these lock ups can
be
> > prevented?
> > 
> > 
> > I'm not sure if this dmesg is from the forementioned problem, but
I'll
> > provide it just in case:
> >  CIFS VFS: No response to cmd 115 mid 15
> >  CIFS VFS: Send error in SessSetup = -11
> >  CIFS VFS: No response to cmd 115 mid 17
> >  CIFS VFS: Send error in SessSetup = -11
> > 
> > 
> > Thanks ahead of time for your assistance!
> > 

Kernel version?

-- 
Jeff Layton <jlayton at samba.org>


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