Re: mnt_count accounting broken

From: Alexander Viro (viro@math.psu.edu)
Date: Fri May 05 2000 - 14:46:57 EST


On Fri, 5 May 2000, Tigran Aivazian wrote:

> Dear People, I am sorry but did you read my log at all? Both Linus and Al
> claim that the problem is umounting the nonempty fs but I think I
> illustrated clearly that even when ramfs filesystem is empty - it cannot
> be umounted. Here is the extract:
>
> # mount -t ramfs none /mnt/m5
> # touch /mnt/m5/new
> # umount /mnt/m5
> C: count!=2 (3)
> umount: /mnt/m5: device is busy
> # rm /mnt/m5/new
> # umount /mnt/m5
> A: mnt_count>2 (3)

Interesting... I might screw up with unlink(2), but then it would be
immediately visible on _every_ fs. I'll try to look into that.

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