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Date:      Tue, 3 Jul 2001 00:00:44 -0700
From:      "Robert L Sowders" <rsowders@usgs.gov>
To:        John Reynolds <jjreynold@home.com>
Cc:        owner-freebsd-stable@FreeBSD.ORG, stable@FreeBSD.ORG
Subject:   Re: Hard lockups since cvsup'ing Jul 1st. Help!
Message-ID:  <OF9C18FD6E.59995745-ON88256A7E.00235244@wr.usgs.gov>

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Ok, 

Don't know if this means anything, maybe not related at all, but from 
Tor,Egge's email with patch I took a look at the cvsweb and noticed some 
interesting things.  Tor broke out in ddb and saw the system was hung in 
lock status.  I don't know why he suspected the mfs system as a cause but 
he apparently patched his system to work.  I took a look at the cvsweb and 
noticed that mfs_vfsops.c was marked as removed at version 1.93 4 weeks 
ago by phk, but two weeks ago version 181 was added and updated by 1.82 
but the dates are backwards on the versions.  Screwy eh?

There was a commit to the mfs_vfsops.c file done on Jun 17, that may have 
been kinda screwy, or maybe it's just the cvs system.  version 1.81 is 
marked as occuring on Jun 17, 2001 and version 1.82 occurred at Apr 15 
2000.  This may be the break point, I don't know, but I had good kernels 
up till Jun 14, 2001.  Version 1.82 had an add but is marked older than 
1.81.   I'm not sure if cvsup uses the date or the version when it's 
supping files, if it uses the date then everyone got an old file without 
the add, which is at line 181 of mfs_vfsops.c 

Hope the URL doesn't wrap, if it does then unbend it ;-)
.
http://www.FreeBSD.org/cgi/cvsweb.cgi/src/sys/ufs/mfs/Attic/mfs_vfsops.c.diff?r1=1.82&r2=1.81.2.1&f=h

Checking my srcs locally it appears that indeed my cvsup pulled version 
1.81.2.1 dated 2001/06/17 which is wrong and does not have the add in 
version 1.82.  The add on version 1.82 was #include <ufs/ufs/extattr.h>  I 
wonder how many other things are screwy in the cvs repository?  Stands to 
reason (mine is often suspect) that it might be a good idea to try a snap 
before Jun 17, 2001.

But with a fresh cvsup today and no mfs file system, my box is back up. It 
is my test server and does nothing except syslog my firewall logs.  So 
I'll be watching for comments from others.

Hope this helps.






John Reynolds <jjreynold@home.com>
Sent by: owner-freebsd-stable@FreeBSD.ORG
07/02/2001 11:03 PM

 
        To:     "Robert L Sowders" <rsowders@usgs.gov>
        cc:     stable@FreeBSD.ORG
        Subject:        Re: Hard lockups since cvsup'ing Jul 1st. Help!


[ On Monday, July 2, Robert L Sowders wrote: ]
> By chance are you using any kind of mfs file system?  I was using a mfs 
> tmp.  I commented out the mfs entry in the fstab file and bingo my 
system 
> works again.  There was a patch submitted my Tor.Egge in another thread 
> that addressed problems in the mfs system.
> 
> It's been up for about an hour now, but it's lightly loaded, so I'm 
still 
> watching it.
> 

Nope. No MFS here, pretty vanilla:

/dev/ad0s1b             none            swap    sw              0       0
/dev/ad0s1a             /               ufs     rw              1       1
/dev/ad0s1g             /tmp            ufs     rw              2       2
/dev/ad0s1h             /disk1          ufs     rw              2       2
/dev/ad0s1f             /usr            ufs     rw              2       2
/dev/ad0s1e             /var            ufs     rw              2       2
/dev/da0s1e             /home           ufs     rw              2       2
/dev/cd0c               /cdrom          cd9660  ro,noauto       0       0
proc                    /proc           procfs  rw              0       0

An SMP kernel built from sources from June 17th (1am MST) is rock solid. 
I'm
now building SMP/UP kernels from sources from June 24th to see how that 
date
is. It may take a few iterations, but I'll find the date things 
broke--then we
can figure it out from there.

-Jr

-- 
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John Reynolds         Chandler Capabilities Engineering, CDS, Intel 
Corporation
jreynold@sedona.ch.intel.com  My opinions are mine, not Intel's. Running
jjreynold@home.com        FreeBSD 4.3-STABLE. FreeBSD: The Power to Serve.
http://www.reynoldsnet.org/  Come join us!!! @ http://www.FreeBSD.org/
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