From hsu@mail.clinet.fi  Mon Jul 28 20:57:59 1997
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Date: Tue, 29 Jul 1997 06:57:53 +0300 (EEST)
From: Heikki Suonsivu <hsu@mail.clinet.fi>
Reply-To: hsu@mail.clinet.fi
To: FreeBSD-gnats-submit@freebsd.org
Subject: nfsiod, panic, page fault in kernel mode (frequent)
X-Send-Pr-Version: 3.2

>Number:         4186
>Category:       kern
>Synopsis:       nfsiod, panic, page fault in kernel mode (frequent)
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    peter
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jul 28 21:00:01 PDT 1997
>Closed-Date:    Wed Mar 28 12:44:49 PST 2001
>Last-Modified:  Wed Mar 28 12:45:26 PST 2001
>Originator:     Heikki Suonsivu
>Release:        FreeBSD 2.2-STABLE i386
>Organization:
Clinet, Espoo, Finland
>Environment:

2.2-STABLE, upgraded to 20 th sup about a week ago.

>Description:

nfs clients seem to have become very unstable and keep locking up, usually
with a panic message on the console and sitting at "syncing disks".  This
did not happen with sup from about a month ago.

Fatal trap 12: page fault while in kernel mode
fault virtual address: 0x87654371
fault code: supervisor read, page not present
instruction pointer: 0x8:0xf0131acf
stack pointer: 0x10:0xefbffd7c
frame pointer: 0x10:0xefbffd8c
code segment: base 0x0, limit 0xfffff, type 0x1b
		DPL 0, pres 1, def 32 1, gran 1
processor eflags: interrupt enabled, resume, IOPL = 0
current process: 93 (nfsiod)
interupt mask: bio
panic: page fault

f013156c T _insmntque
f01315d8 T _vwakeup
f0131658 T _vinvalbuf
f0131890 T _bgetvp
f013192c T _brelvp
f01319bc T _pbgetvp
f0131a00 T _pbrelvp
f0131a3c T _reassignbuf
f0131b40 T _bdevvp
f0131bac T _checkalias
f0131cd8 T _vget
f0131dbc T _vref
f0131e04 T _vput
f0131e58 T _vrele
f0131f58 T _vflush
f013207c T _vclean

>How-To-Repeat:

Seems to happen often with heavy nfs use.

>Fix:
	

>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback 
State-Changed-By: phk 
State-Changed-When: Tue Apr 14 12:06:51 PDT 1998 
State-Changed-Why:  
can we close this ? 
State-Changed-From-To: feedback->open 
State-Changed-By: peter 
State-Changed-When: Sun Apr 26 01:20:20 PDT 1998 
State-Changed-Why:  
One of the things I'll be doing is stress testing the clients and servers, 
so I should be able to duplicate this. 


Responsible-Changed-From-To: freebsd-bugs->peter 
Responsible-Changed-By: peter 
Responsible-Changed-When: Sun Apr 26 01:20:20 PDT 1998 
Responsible-Changed-Why:  
I'lltake this. 

From: Peter Wemm <peter@netplex.com.au>
To: FreeBSD-gnats-submit@FreeBSD.org
Cc:  Subject: Re: kern/4186: nfsiod, panic, page fault in kernel mode (frequent)
Date: Mon, 11 May 1998 17:36:58 +0800 (WST)

 Just a note to myself:
 
 peter@einstein[5:33pm]~src/sys-102> grep NOLIST */*
 kern/vfs_bio.c:         bp->b_vnbufs.le_next = NOLIST;
 kern/vfs_subr.c:        (bp)->b_vnbufs.le_next = NOLIST; \
 kern/vfs_subr.c:        if (bp->b_vnbufs.le_next != NOLIST)
 kern/vfs_subr.c:        if (bp->b_vnbufs.le_next != NOLIST)
 sys/buf.h:#define NOLIST ((struct buf *)0x87654321)
 vm/swap_pager.c:                bp->b_vnbufs.le_next = NOLIST;
 vm/swap_pager.c:        bp->b_vnbufs.le_next = NOLIST;
 vm/vm_pager.c:          bp->b_vnbufs.le_next = NOLIST;
 vm/vm_pager.c:  bp->b_vnbufs.le_next = NOLIST;
 vm/vm_pager.c:  bp->b_vnbufs.le_next = NOLIST;
 peter@einstein[5:33pm]~src/sys-103> dc
 16 o 
 16 i
 87654371 87654321 - p
 50
 
 BTW; is this still happening?
 

From: "Tim Verbois" <Tim.Verbois@rsftew.luc.ac.be>
To: <freebsd-gnats-submit@freebsd.org>, <hsu@mail.clinet.fi>
Cc: <Tim.Verbois@rsftew.luc.ac.be>
Subject: Re: kern/4186: nfsiod, panic, page fault in kernel mode (frequent)
Date: Fri, 1 Jan 1999 12:36:02 +0100

 This is a multi-part message in MIME format.
 
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 I also keep having this fault.  What do I do about it???
 
 Please help me ...
 
 mail me at Tim.Verbois@student.luc.ac.be
 
 Thanks...
 
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 <META content=3Dtext/html;charset=3Diso-8859-1 =
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 </HEAD>
 <BODY bgColor=3D#ffffff>
 <DIV><FONT color=3D#000000 size=3D2>I also keep having this fault.&nbsp; =
 What do I=20
 do about it???</FONT></DIV>
 <DIV><FONT color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
 <DIV><FONT color=3D#000000 size=3D2>Please help me ...</FONT></DIV>
 <DIV><FONT color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
 <DIV><FONT color=3D#000000 size=3D2>mail me at <A=20
 href=3D"mailto:Tim.Verbois@student.luc.ac.be">Tim.Verbois@student.luc.ac.=
 be</A></FONT></DIV>
 <DIV><FONT color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
 <DIV><FONT color=3D#000000 size=3D2>Thanks...</FONT></DIV></BODY></HTML>
 
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State-Changed-From-To: open->feedback 
State-Changed-By: iedowse 
State-Changed-When: Wed Mar 28 12:37:22 PST 2001 
State-Changed-Why:  
Is this still a problem with more recent releases? 

http://www.freebsd.org/cgi/query-pr.cgi?pr=4186 
State-Changed-From-To: feedback->closed 
State-Changed-By: iedowse 
State-Changed-When: Wed Mar 28 12:44:49 PST 2001 
State-Changed-Why:  
Mail to originator bounces. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=4186 
>Unformatted:
