Re: reiser4 plugins

David Masover
2005-06-27T06:31:54Z

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Valdis.Kletnieks@vt.edu wrote:
> On Mon, 27 Jun 2005 00:57:54 CDT, David Masover said:
>
>
>>In one of three possible settings for the imaginary zipfile plugin, yes.
>> But if we're talking about a kernel source tree, how many of us
>>actually build zipfiles/tarballs of their kernel source trees, rather
>>than unpack existing ones?
>
>
> I dunno. I'll often build a tarball of "-mm plus local patches" known to
> be working at the moment, precisely so I can just untar that as a known good
> base for the next kernel-hackfest, rather than untar Linus's tree, apply all
> of the -mm patch, then all my local patches again...

What you really want is a copy-on-write tree, or a simpe cp. Or are you
that short on space that you need compression?

Speaking of which, I know copy-on-write files are planned. What about
whole trees?

But, short of that, you can always do a poor man's copy-on-write with
"cp -al" or "cp -as", assuming you remember to copy when you write...

> And even if I'm not *that* ambitious, I'll at least tar up a clean -mm tree
> to use as a base. :)

I just keep a -mm patch around and the original vanilla tarball, but to
each his own.

> And even if I didn't do that, you *do* have to do something when the disk
> gets backed up. You *do* intend for sensible things to happen then, right? ;)

I back up with rsync, actually.

Speaking of backup, that's another nice place for a plugin. Imagine a
dump that didn't have to be of the entire FS, but rather an arbitrary
tree... That might be a nice new archive format. I know Apple already
uses something like this for their dmg packages.
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