[pptp-server] Any known problems on SMP machines

Thu Aug 17 18:47:32 CDT 2000

David Luyer, one of the active poptop contributors, posted the following info a while ago. It was previously posted before that.

- Josh

-------------

From: "David Luyer" <david_luyer at pacific.net.au>
To: "Joshua Nekl" <jnekl at kc.rr.com>
Sent: Monday, June 19, 2000 10:33 AM
Subject: Re: [pptp-server] GRE: Bad checksum from pppd 

> > > I posted some time ago here about SMP races in kernel tty or ppp
> > code.
> > > The latest 2.2.x kernels from Alan Cox should be fine SMP with ppp.
> > ------------------------------------
> > We're using kernel 2.2.14. Is that recent enough, or do we need to go
> > to
> > 2.2.15 or 2.2.16???
>------------------------------------- 
> It's either 2.2.15 or 2.2.16 which fixes the SMP races in ppp/tty code.
> 
> I know 2.2.14 is buggy for SMP high-speed ppp.
> 
> David.
> -- 
> ----------------------------------------------
> David Luyer
> Senior Network Engineer
> Pacific Internet (Aust) Pty Ltd
> Phone:  +61 3 9674 7525
> Fax:    +61 3 9699 8693
> Mobile: +61 4 1064 2258, +61 4 1114 2258
> http://www.pacific.net.au        NASDAQ: PCNTF
> << fast 'n easy >>
> ----------------------------------------------
> 
> 

----- Original Message ----- 
From: "Rich Hall" <rich at cx1005202-a.elcjn1.sdca.home.com>
To: <pptp-server at lists.schulte.org>
Sent: Thursday, August 17, 2000 1:19 PM
Subject: Re: [pptp-server] Any known problems on SMP machines

> 
> Someplace here on the thread is a statement that 2.2.14 does not work on
> SMP machines.. I beg to differ.. I have 11 machines all running 2.2.14 now
> for the better part of a year+ all with AMD SCSI RAID controllers (Express
> 200 and 1400 ) with ASUS P2B motherboards and all is fine with no downtime
> on any of them. 3C905 NIC's too and ATI Video.
> 
> -Rich
> 
> On Thu, 17 Aug 2000, Kenneth E. Lussier wrote:
> 
> > Date: Thu, 17 Aug 2000 12:58:01 -0400
> > From: Kenneth E. Lussier <kenlussier at mediaone.net>
> > To: Michael Walter <walterm at gliatech.com>
> > Cc: "PPTPD User Group (E-mail)" <pptp-server at lists.schulte.org>
> > Subject: Re: [pptp-server] Any known problems on SMP machines
> > 
> > Hardware could be a very real problem. Since I have been havin
> > hard-lock issues of my own, I have been researching not only all
> > of the software on the box, but also all of the hardware issues.
> > I hope that this info is helpful to someone. Some things that I
> > have found:
> > 
> > 1)VA Linux uses an Adaptec 7986/7 SCSI controller that is not
> > completely supported by the kernel (source-VA Linux)
> > 
> > 2) The EEPro/100 has a tendency to take an IRQ that is reserved
> > by a SCSI controller (source - Donald Becker)
> > 
> > 3) SMP support in the current kernels can be flakey  depending on
> > the bus (Source - Mission Critical Linux)
> > 
> > 4) The ethernet bonding driver is extremely flakey (Source -
> > Mission Critical Linux)
> > 
> > 5) DEC Tulip-based cards have trouble auto-negotiating (source -
> > Donald Becker)
> > 
> >  
> > 
> > 
> > Michael Walter wrote:
> > > 
> > > I have SMP and PPTPD working flawlessly on a Dell Poweredge 1300 w/ dual
> > > pentium3-500, perc2/sc raid.  It was a bit of a pain to get up, but none of
> > > the problems were related to smp support.
> > > 
> > > Thanks,
> > > 
> > > Michael J. Walter
> > > rhce mcse mcp+i a+
> > > Network Administrator
> > > Gliatech, Inc.
> > > 23420 Commerce Park Rd.
> > > Beachwood, Ohio 44122
> > > Tel: (216) 831-3200
> > > Email: walterm at gliatech.com
> > > 
> > > -----Original Message-----
> > > From: Joshua Nekl [mailto:jnekl at kc.rr.com]
> > > Sent: Wednesday, August 16, 2000 10:02 AM
> > > To: James Orr; pptp-server at lists.schulte.org
> > > Subject: Re: [pptp-server] Any known problems on SMP machines
> > > 
> > > What kernel are you using.
> > > 
> > > There are problems on SMP boxes with kernel versions below 2.2.15 or so.
> > > Supposibly, kernel 2.2.15 or 2.2.16 works, though I haven't tried it yet (I
> > > know 2.2.14 doesn't work).
> > > 
> > > - Josh
> > > 
> > > ----- Original Message -----
> > > From: "James Orr" <jorr at loudcloud.com>
> > > To: <pptp-server at lists.schulte.org>
> > > Sent: Tuesday, August 15, 2000 2:51 PM
> > > Subject: [pptp-server] Any known problems on SMP machines
> > > 
> > > > Currently trying to lock down some instabilities in a poptop
> > > > installation. The one machine which is a uniprocessor seems to be
> > > > working properly, however, the 2 multiprocessor machines are flaky. Am I
> > > > racing down a blind alley?
> > > >
> > > > Thanks,
> > > >
> > > > -Jim
> > > >
> > > 
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> 
> ==============================================================================
>  Richard Hall - email: rich at netlynx.com
>  http://www.netlynx.com/rich/
>  Amateur Radio: KF6ARX 
> ==============================================================================
> 
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