Need to force sync(2) before umounting UFS1 filesystems?

[Garrett Cooper]

2011/9/25 Lev Serebryakov <lev at freebsd.org>:
> Hello, Garrett.
> You wrote 25 сентября 2011 г., 12:06:05:
>
>>     Talking to Xin yesterday, he was convinced that this was a
>> filesystem//kern bug. Before I file a PR, I'm wondering if anyone else
>> has seen this issue..
>  Yes, and I posted message about it in embedded@ (Message-ID
> <1175277342.20110821215629 at serebryakov.spb.ru>), I've got additional
> question from Warner Losh about base (underlying) file system, without
> any additional reaction.

Thanks for the comments Adrian and Lev! I've filed PR 161016 to track
the issue, because it might be due to changes in the SU code, md, or a
subtle race condition in umount (highly unlikely, but it's been
noted).
-Garrett