lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20070205213530.GA9794@infradead.org>
Date:	Mon, 5 Feb 2007 21:35:30 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	Nigel Cunningham <nigel@...el.suspend2.net>
Cc:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Andrew Morton <akpm@...ux-foundation.org>, akuster@...sta.com,
	linux-kernel@...r.kernel.org, Pavel Machek <pavel@....cz>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [patch 1/1] PM: Adds remount fs ro at suspend

On Tue, Feb 06, 2007 at 08:28:33AM +1100, Nigel Cunningham wrote:
> Why do you think remounting filesystems is necessary? Are you getting
> problems with some particular filesystem?
> 
> If I recall correctly, we briefly tried remounting filesystems in
> Suspend2, but it created problems with logging - some files open r/w
> were readonly afterwards.

Yes, that's the biggest problem with the forced remount r/o hack -
FMODE_WRITE is dropped from all files, and can't be recovered.
(and at the same time in progress writes or writes through shared
mmaps are totally ignored).

> We then tried bdev freezing with much better success.

Yes, that's the right thing to do if you want to be safe, but
we already had that discussion..

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ