On Fri, 5 May 2000, Tigran Aivazian wrote:
> Hi,
>
> Ok, here is the promised "consistent reproducible picture" and, btw,
> the "-o noatime" observation seemed to be bogus (i.e. some small changes
> I made distorted the picture). Below is a session with a clean
> 2.3.99-pre7-5 (with a tiny debug patch below):
>
> # mount -t ramfs none /mnt/m3
> # cd /mnt/m3
> # touch new
> # l
> total 0
> -rw-r--r-- 1 root root 0 May 5 17:33 new
> # cd
> # umount /mnt/m3
> C: count!=2 (3)
> umount: /mnt/m3: device is busy
ACK. It's not ->mnt_count, it's an extra dentry reference that holds the
ramfs objects in dcache. Solution:
ramfs_umount_begin() that would do equivalent of rm -rf.
With the changes I'm doing right now we will catch busy filesystems
without dentry scan, thus we are safe here.
Linus, are you OK with such variant?
Cheers,
Al
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