From mboxrd@z Thu Jan  1 00:00:00 1970
From: Milan Broz <mbroz@redhat.com>
Subject: Re: [PATCH] dm_crypt: Issue all previous bios before
 remapping barrier bio
Date: Mon, 01 Feb 2010 16:39:42 +0100
Message-ID: <4B66F5BE.3030205@redhat.com>
References: <201002012049.27132.knikanth@suse.de>
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To: Nikanth Karthikesan <knikanth@suse.de>
Cc: dm-devel@redhat.com, Mikulas Patocka <mpatocka@redhat.com>, Alasdair G Kergon <agk@redhat.com>
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On 02/01/2010 04:19 PM, Nikanth Karthikesan wrote:
> Before remapping a barrier bio, make sure that there are no un-issued
> pending I/O in the workqueue. Otherwise a dm_flush would simply add
> a barrier request to the underlying device, without issuing the bio's
> queued in the dm_crypt device.

This should not be needed. Core dm code waits for all bios submitted before
barrier requests.

Mikulas, could you verify it?

Milan