From mboxrd@z Thu Jan  1 00:00:00 1970
From: Zdenek Kabelac <zkabelac@redhat.com>
Subject: Re: dm-bufio
Date: Fri, 23 Mar 2012 12:10:23 +0100
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Cc: "Kasatkin, Dmitry" <dmitry.kasatkin@intel.com>, mpatocka@redhat.com
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Dne 23.3.2012 12:01, Kasatkin, Dmitry napsal(a):
> Hello,
> 
> When using dm-bufio and dm-io in general, how to ensure that all dirty
> buffers are written to the storage when machine reboots?
> suspend hooks could be used, but they are not called on reboot, only
> when suspending/removing the target...
> 

You mean you reboot without running  'sync' command?

And yes - on reboot you should properly unmount devices - so you should
see removal of target on your shutdown sequence -  I believe Fedora currently
tries to support switch to some shutdown ramdisk, so all filesystem and
devices might be properly unmounted and destroyed.

Zdenek