linux-kernel - Re: [PATCH 2.6.28?] don't unlink an active swapfile

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Message-ID: <20081114173422.GA22868@infradead.org>
Date:	Fri, 14 Nov 2008 12:34:22 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Willy Tarreau <w@....eu>,
	Christoph Hellwig <hch@...radead.org>,
	Peter Cordes <peter@...des.ca>, Bodo Eggert <7eggert@....de>,
	David Newall <davidn@...idnewall.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, linux-mm <linux-mm@...ck.org>
Subject: Re: [PATCH 2.6.28?] don't unlink an active swapfile

On Fri, Nov 14, 2008 at 02:37:22AM +0000, Hugh Dickins wrote:
> Peter Cordes is sorry that he rm'ed his swapfiles while they were in use,
> he then had no pathname to swapoff.  It's a curious little oversight, but
> not one worth a lot of hackery.  Kudos to Willy Tarreau for turning this
> around from a discussion of synthetic pathnames to how to prevent unlink.
> Mimic immutable: prohibit unlinking an active swapfile in may_delete()
> (and don't worry my little head over the tiny race window).

Looks good (but I think I already said this before)

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