Date: Thu, 14 Jun 2001 11:27:21 +0100 From: Pete French <pfrench@firstcallgroup.co.uk> To: msmith@freebsd.org Cc: stable@FreeBSD.ORG Subject: Re: Very odd clock problem Message-ID: <E15AULR-0008jP-00@dilbert.fcg.co.uk> In-Reply-To: <200106130824.f5D8OSn08506@mass.dis.org>
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> Why is it only this user? Are they your only user that cares? Or does > the time step only happen when they are sending mail? They appear to be the only user that cares - or rather the only one that mails 'root' with the problem.My fellow sysadmin says a cuple of other people have mailed him privately with the same problem. It does not only happen which this user is logged in. > I'm really at a loss here; as I said, it sounds like a very specific > kernel sniper bug of some sort. 8( I've set up Peter Jeremys suggestions for ntp statistics collecting and started it re-running so see what that gives. Interestingly the problem has not recurred during the time that we have had NTP disabled. Its hard to tell if the time always jumps back to the same value as wwe cannot see eactly what it gets set to. I would suspect that it *is* always jumping back to the same value as when we see it then it is always within a few days of the same value. I'll have more information when it goes worng again and I have the ntp statistics. The only other fact I can think of that may be relevent (in fact is highly likely to be relevent) is that tis only started occurring when we switched from running a generic kernel to a custom kernel. The system ran wiith a custom kerenel build on 4.2-STABLE until around May 1st when I upgraded the discs and also put 4.3-STABLE onto it (but with a generci kernel, though locally compiled). This was rebuilt into a custom kernel for the box a couple of weeks ago and since then the problem has started happening. I dont have any funny options in make.conf WITHOUT_X11= yes NO_SENDMAIL= true CFLAGS= -O -pipe COPTFLAGS= -O -pipe The kernel config removes all ATA and ATAPI devices, all SCSI controllers other than ahc, all ethers other than xl, and all USB devices. It is a -STABLE supped on June 11th. -pete. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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