All of lore.kernel.org
 help / color / mirror / Atom feed
From: Arno Wagner <arno@wagner.name>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] FYI: how to (really) cleanly shutdown the system	when root is on multiple stacked block devices
Date: Sat, 26 Jun 2010 14:52:23 +0200	[thread overview]
Message-ID: <20100626125223.GA26185@tansi.org> (raw)
In-Reply-To: <1277553580.29791.40.camel@fermat.scientia.net>

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
----
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans

If it's in the news, don't worry about it.  The very definition of 
"news" is "something that hardly ever happens." -- Bruce Schneier 

  reply	other threads:[~2010-06-26 12:52 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-26 11:59 [dm-crypt] FYI: how to (really) cleanly shutdown the system when root is on multiple stacked block devices Christoph Anton Mitterer
2010-06-26 12:52 ` Arno Wagner [this message]
2010-06-26 14:21   ` Christoph Anton Mitterer
2010-06-26 18:36     ` Arno Wagner
2010-06-26 19:24       ` Milan Broz
2010-06-26 23:13         ` Christoph Anton Mitterer
2010-06-26 23:34           ` Arno Wagner
2010-06-27  0:20             ` markus reichelt
2010-06-27  8:35               ` Milan Broz
2010-06-27 12:03                 ` Christoph Anton Mitterer
2010-07-02 18:48                 ` markus reichelt
2010-07-02 19:29                   ` Christoph Anton Mitterer
2010-06-27  2:28             ` Christoph Anton Mitterer
2010-06-27  2:53               ` Arno Wagner
2010-06-27 11:57                 ` Christoph Anton Mitterer
2010-06-26 23:30         ` Arno Wagner
2010-06-27  2:31 ` Christoph Anton Mitterer
2010-06-27  2:39   ` Christoph Anton Mitterer
2010-06-27  2:56   ` Arno Wagner
2010-06-27 12:21     ` Christoph Anton Mitterer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20100626125223.GA26185@tansi.org \
    --to=arno@wagner.name \
    --cc=dm-crypt@saout.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.