linux-kernel - RE: [RFC] persistent store (version 2) (part 1 of 2)

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Message-ID: <987664A83D2D224EAE907B061CE93D530191F27E0E@orsmsx505.amr.corp.intel.com>
Date:	Wed, 1 Dec 2010 22:00:12 -0800
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...e.hu" <mingo@...e.hu>, "greg@...ah.com" <greg@...ah.com>,
	"Huang, Ying" <ying.huang@...el.com>,
	Borislav Petkov <bp@...en8.de>,
	David Miller <davem@...emloft.net>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Kyungmin Park <kmpark@...radead.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: RE: [RFC] persistent store (version 2) (part 1 of 2)

> filenames refer to files!  And lo, that's what we have here.  A
> filesystem!  The files are created by the kernel and are read and
> unlinked by userspace.
>
> So why not implement this whole thing as a proper filesystem?
...
> Wait.  It *is* a filesystem.
...
> So why can't I remove these "records" with rm?

Because I tried to use /sys for this and couldn't find a
way to get notified about "unlink".  Alan Cox called this
bit "daft" in v1 (and I agreed with him). Peter Anvin gave
me some pointers on how easy this would be to do as a real
filesystem ... so v3 will be out in a little while with
this insanity removed.

I'll roll in fixes to address your other comments too.

Thanks for the review.

-Tony
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