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Date: Fri, 4 Dec 2020 18:06:40 +0200
From: Konstantin Belousov <kostikbel@gmail.com>
To: =?utf-8?B?w5Z6a2Fu?= KIRIK <ozkan.kirik@gmail.com>
Cc: freebsd-stable <freebsd-stable@freebsd.org>
Subject: Re: msdosfs umount problem
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On Fri, Dec 04, 2020 at 04:39:43PM +0300, Özkan KIRIK wrote:
> # ps alxww | grep umount
>    0 13556  1360  0  20  0 10716  2076 mntref   D+    1    0:00.00 umount
> -vf /mnt
> 
> checkedout version:
> commit e7cae3d24a3e8d036c763f294bcd9883a180c36a (freebsd/stable/12)
> https://github.com/freebsd/freebsd/commits/stable/12 (still it's the last
> commit)
> 
> On Fri, Dec 4, 2020 at 4:26 PM Konstantin Belousov <kib@freebsd.org> wrote:
> 
> > On Fri, Dec 04, 2020 at 03:19:31PM +0300, Özkan KIRIK wrote:
> > > Hello,
> > >
> > > I've just checkedout stable/12 branch. Unmounting msdosfs blocks
> > >
> > > # newfs_msdos -C 40M efiboot.img
> > > efiboot.img: 81800 sectors in 10225 FAT16 clusters (4096 bytes/cluster)
> > > BytesPerSec=512 SecPerClust=8 ResSectors=1 FATs=2 RootDirEnts=512
> > > Media=0xf0 FATsecs=40 SecPerTrack=63 Heads=255 HiddenSecs=0
> > > HugeSectors=81920
> > > # mdconfig ./efiboot.img
> > > md0
> > > # mount -t msdosfs /dev/md0 /mnt
> > > # umount -vf /mnt    (uninterruptable wait)
> > >
> > > On other termial:
> > > # ps ax | grep umount
> > > 1333  0  D+     0:00.00 umount -vf /mnt
> > >
> > > There is not such a problem on 12.1 stable
> > Which revision did you checked out ?
> > Show the mchan of the umount process, like 'px alxww | grep umount'.
> >

This should be fixed by r368339.
Thank you for the report.