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Date:      Sat, 6 Jul 1996 14:00:50 +0200 (MET DST)
From:      blank@sliphost37.uni-trier.de
To:        FreeBSD-gnats-submit@freebsd.org
Subject:   kern/1371: kernel doesn't flush all its buffers when told to halt the system
Message-ID:  <199607061200.OAA04192@sliphost37.uni-trier.de>
Resent-Message-ID: <199607061400.HAA26058@freefall.freebsd.org>

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>Number:         1371
>Category:       kern
>Synopsis:       kernel doesn't flush all its buffers when told to halt the system
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jul  6 07:00:02 PDT 1996
>Last-Modified:
>Originator:     Sascha Blank
>Organization:
University of Trier, Germany
>Release:        FreeBSD 2.1-STABLE i386
>Environment:

System: FreeBSD 2.1-STABLE with CTM-Patches up to #136
Architecture: Intel Pentium 133, EIDE harddisc and CD-ROM, no SCSI devices,
48 MByte RAM, Triton Chipset

>Description:

About one out of two attempts to shutdown and halt my system using the
command "shutdown -h now" ends up like this:

syncing disks... 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 giving up

If this happens, then it is always buffer 4 that can't be flushed. As far
as I have noticed the amount of process and/or memory load does not
influence the occurence of this error. I encountered it sometimes right
after shutting down and halting a system that has been rebooted a minute
ago, while at other times halting my machine after running for some days
under some heavier load works correctly.

I am quite sure the error was introduced in one of the CTM patches >=
#120 (I guess it was somewhere around #128, but I am not sure). Before
that crucial patch I have never had any problems halting my machine.

>How-To-Repeat:

Enter "shutdown -h now" and watch, if all buffers are flushed correctly.

>Fix:

No idea yet.
>Audit-Trail:
>Unformatted:



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