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Date: Sat, 26 Jun 2010 14:52:23 +0200
From: Arno Wagner <arno@wagner.name>
Message-ID: <20100626125223.GA26185@tansi.org>
References: <1277553580.29791.40.camel@fermat.scientia.net>
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Subject: Re: [dm-crypt] FYI: how to (really) cleanly shutdown the
	system	when root is on multiple stacked block devices
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To: dm-crypt@saout.de

As far as I know, the "remount,ro" does a complete flush, just
as an umount does. So, yes, the fs-layer "umount"/"remount,ro" 
should make sure everything is on disk when it returns. 

ON addition, any meta-information (RAID superblock, LVM superblock, 
LUKS header) should be written to disk immediately after a change.

Arno

On Sat, Jun 26, 2010 at 01:59:40PM +0200, Christoph Anton Mitterer wrote:
> Hi dm-crypt experts.
> 
> I've posted a question
> (http://thread.gmane.org/gmane.linux.kernel/1003210) on linux-kernel
> regarding stacked block layers (including dm-crypt) and if you didn't
> already read it, I'd like to draw your attention on it.
> Perhaps you can comment :)
> 
> 
> Thanks,
> Chris.
> 
> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt
> 

-- 
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
----
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