*BSD News Article 54110


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From: Terry Lambert <terry@lambert.org>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Problems with File System Panics
Date: 8 Nov 1995 05:36:59 GMT
Organization: Utah Valley State College, Orem, Utah
Lines: 27
Message-ID: <47pflr$g59@park.uvsc.edu>
References: <47j8io$9e3@molokini.conterra.com>
NNTP-Posting-Host: hecate.artisoft.com

jeff@conterra.com (Jeff McElroy) wrote:
] I have a FreeBSD machine panicing every few hours w/ INN under heavy
] load.
] 
] All panics have been in file system code, usually on the thread of a
] ufs_lookup.   Drives are Seagate 4GB SCSI Barracuda with Adaptec 2940
] running at first 2.0.5 and then 7/16 snap.    

There are a number of failure mode handling bugs in UFS.  If you
can increase the number of vnodes in core, this will stave off
the problems somewhat.

You can do this by hacking /sys/kern/vfs_subr.c.

Kicking up maxproc will have a similar effect.


So would installing the layering patches in ~terry if you have
an account on freefall.freebsd.org.



                                        Terry Lambert
                                        terry@cs.weber.edu
---
Any opinions in this posting are my own and not those of my present
or previous employers.