kern/56675: Syncer "giving up" on buffers and ext2 filesystems

[Lefteris Chatzibarbas]

>Number:         56675
>Category:       kern
>Synopsis:       Syncer "giving up" on buffers and ext2 filesystems
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Sep 10 01:30:09 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Lefteris Chatzibarbas
>Release:        FreeBSD 5.1-CURRENT i386
>Organization:
>Environment:
System: FreeBSD bsd 5.1-CURRENT FreeBSD 5.1-CURRENT #0: Mon Sep 8 21:39:20 EEST 2003 root at bsd:/usr/obj/usr/src/sys/CUSTOM i386

>Description:
Syncer is "giving up" on buffers during shutdown if ext2fs partitions are
mounted.  During the next boot all filesystems are checked because of improper
dismount.  Here follows the exact message during shutdown:

  Waiting (max 60 seconds) for system process `vnlru' to stop...stopped
  Waiting (max 60 seconds) for system process `bufdaemon' to stop...stopped
  Waiting (max 60 seconds) for system process `syncer' to stop...stopped
 
  syncing disks, buffers remaining... 8 8 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
  giving up on 6 buffers
  Uptime: 41m20s
  pfs_vncache_unload(): 1 entries remaining
  Shutting down ACPI
  Rebooting...

The related thread on freebsd-current@ mailing list:

  http://lists.freebsd.org/pipermail/freebsd-current/2003-September/009731.html

>How-To-Repeat:
One can repeat the problem by having some ext2fs partitions mounted when
shutting down.

>Fix:

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