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From: Bruce Evans <bde@zeta.org.au>
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To: Arjan van Leeuwen <avleeuwen@piwebs.com>
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cc: current@freebsd.org
Subject: Re: 5.2-BETA: giving up on 4 buffers (ata)
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On Fri, 5 Dec 2003, Arjan van Leeuwen wrote:

> > On Thursday 27 November 2003 10:43, Stefan Ehmann wrote:
> > > This is a known problem for nearly three months now (See PR 56675). It
> > > happens to me every time I shut down the system if i don't unmount my
> > > (read-only) ext2 file systems manually.

> FYI, I'm still seeing this problem on a -CURRENT system from today. Is there
> any way I can help to diagnose the cause of this problem? Is there already a
> fix available somewhere?

No need.  It was diagnosed over 3 months ago (see PR 56675).  I don't know
of any publicly available fix.  My version of ext2fs avoids the bug by
doing buffering differently.

As a workaround, unmount ext2fs file systems before rebooting.
Unmounting most file systems before rebooting should be the default
anyway (handled by shutdown(8) and reboot(8)), since unmounting may
fail and vfs_unmountall() in the kernel has no good way to log errors.

Bruce