Re: ext3 and undeletion

[H. Peter Anvin]

Followup to:  <[e-mail]>
By author:    Mike Fedyk <[e-mail]>
In newsgroup: linux.dev.kernel
> 
> Uhh, no.
> 
> You have a configurable size for the undelete dirs and you delete a file.
> Now, that file gets moved to $mountpoint/.undelete.  The daemon gets
> notified through a socket, and it can check to see if it needs to delete any
> older deleted files to make sure .undelete doesn't get bigger than
> configured.  
> 
> We're only scanning the dirs upon daemon startup (reminds me of
> quota... ;), and all other daemon actions are triggered by unlink() writing
> to a socket.  The worst thing that can happen is not seeing your free space
> immediately, but a few seconds later.
> 

Hence race condition.  Also, the solution to hard-reserve space seems
to fundamentally defeat the purpose (IMO).

	-hpa
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