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SubjectRe: EXT2_UNRM_FL


On Wed, 3 Mar 1999, Theodore Y. Ts'o wrote:

> Date: Thu, 4 Mar 1999 10:26:46 +1100
> From: Richard Gooch <rgooch@atnf.csiro.au>
>
> (d) why not do it in userspace anyway? I did that years ago, although
> I "moved" files to /tmp, but it would be easy enough to move to a
> garbage/$LOGNAME directory on the same FS.
>
> Absolutely, agreed. As I said earlier, there are plenty of user-space
> "rm" replacements, and doing it in the kernel is almost certainly not
> worth the pain.
>
> It might be worth it for the kernel to add a wakeup to the undelete
> daemon telling it that space is low and it should remove some of the
> deleted files, but I'd want to see how well a strategy of polling every
> minute works (or doesn't work) before deciding whether the extra kernel
> bloat was worth it.
>
one thing I am concerned is the those 'rm' replacements does not cover all
the cases. For example, you can call 'unlink' directly from c/perl
program, which will not go through 'rm'. If you really want undelete
freature, I think it should be done a little higher level than, replacing
'rm'. hrmm that makes me wonder.. when you overwrite a file, does the
kernel 'unlink' the file first and assign a new inode?

Ji Lee


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