kern/147459: Kernel panic: vm_page / vdrop / vm_page_cache

[Jon Nistor]

>Number:         147459
>Category:       kern
>Synopsis:       Kernel panic: vm_page / vdrop / vm_page_cache
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jun 04 07:00:15 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Jon Nistor
>Release:        FreeBSD 7.3-RELEASE-p1 i386
>Organization:
>Environment:
System: FreeBSD spike.snickers.org 7.3-RELEASE-p1 FreeBSD 7.3-RELEASE-p1 #0: Wed May 26 04:29:05 UTC 2010 root at i386-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386

	Server: HP DL 320 G4 series, 2.9G Celeron, 2G RAM, all firmware also up-to-date on system.
>Description:
	Multiple kernel panics have been happening after a recent move from 7.2 to 7.3-p1.

In 3 seperate instances I have 3 different types of vm faults it appears:

nistor at spike:~/public_html/crash> grep -i "^panic" * | uniq
fail-0.txt:panic: vdrop: holdcnt 0
fail-1.txt:panic: page fault
fail-2.txt:panic: vm_page_cache: offset already cached
nistor at spike:~/public_html/crash>

Since the output is large from the kernel debugging, I have put them onto pastebin, I hope this is ok.

	http://pastebin.com/BAh1aJ8V	fail-0
	http://pastebin.com/FxHne9uY	fail-1
	http://pastebin.com/DATEvR5M	fail-2

fail-0 summary:
Dump header from device /dev/ar0s1b
  Architecture: i386
  Architecture Version: 2
  Dump Length: 237580288B (226 MB)
  Blocksize: 512
  Dumptime: Thu Jun  3 19:21:18 2010
  Hostname: spike.snickers.org
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 7.3-RELEASE-p1 #0: Wed May 26 04:29:05 UTC 2010
    root at i386-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
  Panic String: vdrop: holdcnt 0
  Dump Parity: 2355448173
  Bounds: 0
  Dump Status: good

fail-1 summary:
[spike:root] /var/crash# cat info.1
Dump header from device /dev/ar0s1b
  Architecture: i386
  Architecture Version: 2
  Dump Length: 227909632B (217 MB)
  Blocksize: 512
  Dumptime: Fri Jun  4 00:01:11 2010
  Hostname: spike.snickers.org
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 7.3-RELEASE-p1 #0: Wed May 26 04:29:05 UTC 2010
    root at i386-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
  Panic String: page fault
  Dump Parity: 2712125525
  Bounds: 1
  Dump Status: good

fail-2 summary:
[spike:root] /var/crash# cat info.2
Dump header from device /dev/ar0s1b
  Architecture: i386
  Architecture Version: 2
  Dump Length: 224346112B (213 MB)
  Blocksize: 512
  Dumptime: Fri Jun  4 01:27:30 2010
  Hostname: spike.snickers.org
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 7.3-RELEASE-p1 #0: Wed May 26 04:29:05 UTC 2010
    root at i386-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
  Panic String: vm_page_cache: offset already cached
  Dump Parity: 3032040194
  Bounds: 2
  Dump Status: good
[spike:root] /var/crash#



>How-To-Repeat:
	Unclear at this time.

>Fix:
	System auto reboots.


>Release-Note:
>Audit-Trail:
>Unformatted: