From: David Woodhouse <dwmw2@infradead.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Valdis.Kletnieks@vt.edu,
John Richard Moser <nigelenki@comcast.net>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Designing Another File System
Date: Thu, 02 Dec 2004 23:32:03 +0000 [thread overview]
Message-ID: <1102030324.18212.5.camel@localhost.localdomain> (raw)
In-Reply-To: <1101836768.25629.66.camel@localhost.localdomain>
On Tue, 2004-11-30 at 17:46 +0000, Alan Cox wrote:
> On Maw, 2004-11-30 at 18:28, Valdis.Kletnieks@vt.edu wrote:
> > On Mon, 29 Nov 2004 23:32:05 EST, John Richard Moser said:
> > they punt on the issue of over-writing a sector that's been re-allocated by
> > the hardware (apparently the chances of critical secret data being left in
> > a reallocated block but still actually readable are "low enough" not to worry).
>
> I guess they never consider CF cards which internally are log structured
> and for whom such erase operations are very close to pointless.
Actually for the cases where we do that translation layer in software
ourselves to emulate a block device, it would be really nice to know
that a sector is unused an hence that we no longer have to keep its old
stale contents when we garbage-collect.
--
dwmw2
next prev parent reply other threads:[~2004-12-02 23:32 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-30 4:32 Designing Another File System John Richard Moser
2004-11-30 7:16 ` Bernd Eckenfels
2004-11-30 13:07 ` Helge Hafting
2004-12-01 1:16 ` John Richard Moser
2004-11-30 16:31 ` Alan Cox
2004-11-30 18:28 ` Valdis.Kletnieks
2004-11-30 17:46 ` Alan Cox
2004-11-30 19:00 ` Jan Engelhardt
2004-11-30 19:14 ` Valdis.Kletnieks
2004-11-30 20:22 ` Valdis.Kletnieks
2004-12-02 23:32 ` David Woodhouse [this message]
2004-12-01 1:35 ` John Richard Moser
2004-11-30 19:22 ` Phil Lougher
2004-12-01 1:42 ` John Richard Moser
2004-12-01 2:46 ` Phil Lougher
2004-12-01 4:32 ` Bernd Eckenfels
2004-12-01 7:51 ` Phil Lougher
2004-12-01 5:11 ` John Richard Moser
2004-12-02 20:18 ` Jan Knutar
2004-12-07 2:01 ` Phil Lougher
2004-12-07 2:31 ` John Richard Moser
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