Date: Sun, 25 Sep 2011 01:06:05 -0700 From: Garrett Cooper <yanegomi@gmail.com> To: current@freebsd.org, freebsd-fs@freebsd.org Cc: Xin LI <delphij@freebsd.org> Subject: Need to force sync(2) before umounting UFS1 filesystems? Message-ID: <CAGH67wRU7v%2B4B8t7q97BFkMieV7GOMSk0v_4A0w=Z%2BsfKX6LpQ@mail.gmail.com>
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Hi,
I've been doing builds with FreeNAS recently on 9.x-BETA2 machines
recently and I've noticed that I need to add 2 'sync's prior to each
umount command in the nanobsd scripts when running repeated builds,
otherwise it fails with:
umount: unmount of /scratch/freenas/obj.amd64/_.mnt failed: Device busy
Running fstat -f in the sh EXIT trap doesn't reveal anything helpful:
USER CMD PID FD MOUNT INUM MODE SZ|DV R/W
root fstat 79637 wd /scratch/freenas/obj.amd64/_.mnt 2
drwxr-xr-x 512 r
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..
Thanks!
-Garrett
PS I've seen the above behavior on the following systems..
FreeBSD bayonetta.local 9.0-BETA2 FreeBSD 9.0-BETA2 #0 r225653M: Tue
Sep 20 08:36:49 PDT 2011
gcooper@bayonetta.local:/usr/obj/usr/src/sys/BAYONETTA amd64
FreeBSD burnout.ixsystems.com 9.0-BETA1 FreeBSD 9.0-BETA1 #0 r224989:
Sun Aug 21 14:12:11 PDT 2011
gcooper@burnout.ixsystems.com:/usr/obj/usr/src/sys/BURNOUT amd64
FreeBSD fallout.local 9.0-BETA2 FreeBSD 9.0-BETA2 #10 r225587M: Thu
Sep 15 09:07:08 PDT 2011
root@fallout.local:/usr/obj/usr/src/sys/FALLOUT amd64
FreeBSD streetfighter.ixsystems.com 9.0-BETA2 FreeBSD 9.0-BETA2 #0
r225558: Wed Sep 14 20:29:45 PDT 2011
gcooper@streetfighter.ixsystems.com:/usr/obj/usr/src/sys/STREETFIGHTER
amd64
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