Cannot unmount nullfs in current

[hiren panchasara]

On Apr 18, 2013 7:04 PM, "Craig Rodrigues" <rodrigc at freebsd.org> wrote:
>
> Hi,
>
> I am trying to build some software which uses
> nanobsd, and mounts/unmounts many nullfs mounts
> while it runs.  I am hitting failures where
> I cannot unmount nullfs file systems.  I cannot figure out why.

I am also getting similar failures while trying to build freenas.

>
> Here is more info.
>
> SYSTEM
> ======
> I am running amd64, current build at this revision:
>
> 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r249181: Sat Apr  6 03:07:32 UTC 2013
> amd64
>
> STEPS TO REPRODUCE
> ===============
>
> (1)  Create a directory, /opt2/branches.  Make sure that /opt2/branches
>      is on ZFS
>
> (2)
>        mkdir -p /opt2/branches/freenas
>        mkdir -p /opt2/branches/freenas-cache
>
> (3)
>
> git clone git://github.com/freenas/freenas.git /opt2/branches/freenas
> git clone git://
github.com/freenas/ports.git/opt2/branches/freenas-cache/ports
> git clone git://
github.com/trueos/trueos.git/opt2/branches/freenas-cache/trueos
>
> (4)  sudo to root
>
> (5)  cd /opt2/branches/freenas
>
> (6)
> script build.log env GIT_REPO=/opt2/branches/freenas-cache/trueos \
>         GIT_PORTS_REPO=/opt2/branches/freenas-cache/ports \
>         sh build/do_build.sh
>
>
> The build cranks for a while, and then I get this error:
>
> 00:02:37 ### log:
> /opt2/branches/freenas/os-base/amd64/_.cust.add_pkg_archivers_lzo2

I do not get this.
> do_build.sh: ERROR: FreeNAS /opt2/branches/freenas/nanobsd/os-base build
> FAILED; please check above log for more details

I get this which looks like a generic build failure message.

I do not have gnome or any X related things.
>
>
>
> If I look in .cust.add_pkg_archivers_lzo2, I see this error:
>
> + umount /opt2/branches/freenas/os-base/amd64/_.w/usr/ports/distfiles
> umount: unmount of
> /opt2/branches/freenas/os-base/amd64/_.w/usr/ports/distfiles failed:
Device
> busy

Where do you find/see logs for the build?

Another weird thing. Somehow my /sbin was wiped out and only had some pbi-*
files in it. This happened to me on 2 different machines while trying to
build freenas.

I will try to take a closer look today when time permits.

Thanks,
Hiren

>
>
> If I try to do this manually:
>
> # umount /opt2/branches/freenas/os-base/amd64/_.w/usr/ports/distfiles
> umount: unmount of
> /opt2/branches/freenas/os-base/amd64/_.w/usr/ports/distfiles failed:
Device
> busy
>
>
> I can't figure out why this mount is busy.
> If I do:
>
> umount -f /opt2/branches/freenas/os-base/amd64/_.w/usr/ports/distfiles
>
> it unmounts, but I don't like using the '-f' flag to force the unmount.
>
> Any ideas?  I am attaching some of my logs.
>
> --
> Craig
>
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