From: Hugh Dickins <hugh@veritas.com>
To: Bodo Eggert <7eggert@gmx.de>
Cc: David Newall <davidn@davidnewall.com>,
Peter Zijlstra <peterz@infradead.org>,
Peter Cordes <peter@cordes.ca>,
linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
linux-mm <linux-mm@kvack.org>
Subject: Re: no way to swapoff a deleted swap file?
Date: Fri, 17 Oct 2008 13:17:17 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.64.0810171250410.22374@blonde.site> (raw)
In-Reply-To: <E1KqkZK-0001HO-WF@be1.7eggert.dyndns.org>
On Fri, 17 Oct 2008, Bodo Eggert wrote:
>
> Somebody might want their swapfiles to have zero links,
> _and_ the possibility of doing swapoff.
You're right, they might, and it's not an unreasonable wish.
But we've not supported it in the past, and I still don't
think it's worth adding special kernel support for it now.
> If you can do it by keeping some fds open to let
> /proc/pid/fd point to the files, I think it's OK.
I've a very strong aversion to adding strange code to abuse the
/proc/<pid>/fd space of some random kernel thread - a "kswapd"
because its name contains the substring "swap"?
Hugh
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next prev parent reply other threads:[~2008-10-17 12:17 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bnlDw-5vQ-7@gated-at.bofh.it>
[not found] ` <bnwpg-2EA-17@gated-at.bofh.it>
[not found] ` <bnJFK-3bu-7@gated-at.bofh.it>
2008-10-16 23:43 ` Bodo Eggert
2008-10-16 23:43 ` Bodo Eggert
[not found] ` <bnR0A-4kq-1@gated-at.bofh.it>
2008-10-17 8:20 ` Bodo Eggert
2008-10-17 8:20 ` Bodo Eggert
2008-10-17 12:17 ` Hugh Dickins [this message]
2008-10-17 12:36 ` David Newall
2008-10-17 22:42 ` Bodo Eggert
2008-10-18 0:31 ` Peter Cordes
2008-10-18 5:18 ` Willy Tarreau
2008-10-18 20:45 ` Hugh Dickins
2008-10-18 20:49 ` Christoph Hellwig
2008-10-18 20:56 ` Willy Tarreau
2008-11-14 2:37 ` [PATCH 2.6.28?] don't unlink an active swapfile Hugh Dickins
2008-11-14 4:08 ` Peter Cordes
2008-11-14 17:34 ` Christoph Hellwig
2008-11-14 18:02 ` Hugh Dickins
[not found] <20081015202141.GX26067@cordes.ca>
2008-10-16 8:28 ` no way to swapoff a deleted swap file? Peter Zijlstra
2008-10-16 22:38 ` Hugh Dickins
2008-10-17 6:28 ` David Newall
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