Date: Sun, 13 Jun 1999 10:06:20 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: David Scheidt <dscheidt@enteract.com> Cc: Bernd Walter <ticso@cicely.de>, freebsd-hackers@FreeBSD.ORG Subject: Re: softupdates problem? Message-ID: <199906131706.KAA04284@apollo.backplane.com> References: <Pine.NEB.3.96.990613035613.52965B-100000@shell-2.enteract.com>
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:On Sun, 13 Jun 1999, Bernd Walter wrote:
:
:> On Sat, Jun 12, 1999 at 12:13:43AM -0500, David Scheidt wrote:
:> > I had a 3.2 stable (from 30 May 1999)machine panic tonight, trying
:> > to load the oss driver, which is not too shocking. What was shocking
:> > was the damage done to my filesystem. The automatic fsck failed,
:> > with an UNEXPECTED SOFT UPDATES INCONSISTNCY. PARTIALLY ALLOCATED
:> > INODE I=39684.
:> >
:> What kernel-config are you using?
:> I have had several fs-crashes because of a to high configured maxusers.
:
:The only diffs between my config file and GENERIC are:
:1. softupdates
:2. no support for hardware I haven't got
:3. pty is 64
:
:I am not actually complaining about the panic; I think the oss
:driver is a piece of crap. I just happened to have a soundcard
:that they support that the FreeBSD drivers don't, and a .wav file
:I wanted to listen to. What does disturb me is the damage done to
:a pretty quiet filesystem. I wouldn't have thought that toasting
:a whole bunch of files that were not in use would be the normal
:behavior. I have seen lots of panics, but have never seen filesystem
:damage as bad as this.
:
:David Scheidt
This smells like a memory corruption problem rather then a softupdates
problem. i.e. that something in the kernel overwrote random kernel
memory which happened to correspond to a filesystem buffer.
There was a buffer corruption bug found in VFS/BIO recently, but it
was fixed prior to the 3.2 release ( it was an getnewbuf() race,
fixed in 1.193.2.4 of kern/vfs_bio.c ).
-Matt
Matthew Dillon
<dillon@backplane.com>
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