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Date: Mon, 15 May 2006 18:54:40 -0700
From: Andrew Morton <akpm@osdl.org>
To: NeilBrown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org,
       reuben-lkml@reub.net
Subject: Re: [PATCH 001 of 3] md: Change md/bitmap file handling to use bmap
 to file blocks-fix
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NeilBrown <neilb@suse.de> wrote:
>
>  +		do_sync_file_range(file, 0, LLONG_MAX,
>  +				   SYNC_FILE_RANGE_WRITE |
>  +				   SYNC_FILE_RANGE_WAIT_AFTER);

That needs a SYNC_FILE_RANGE_WAIT_BEFORE too.  Otherwise any dirty,
under-writeback pages will remain dirty.  I'll make that change.