linux-kernel - Re: [PATCH] um: ubd: Add REQ

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Message-ID: <20130819091839.GX5918@redhat.com>
Date:	Mon, 19 Aug 2013 10:18:39 +0100
From:	"Richard W.M. Jones" <rjones@...hat.com>
To:	Richard Weinberger <richard@....at>
Cc:	viro@...iv.linux.org.uk,
	user-mode-linux-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] um: ubd: Add REQ_FLUSH suppport

On Sun, Aug 18, 2013 at 12:09:34AM +0200, Richard Weinberger wrote:
> UML's block device driver does not support write barriers,
> to support this this patch adds REQ_FLUSH suppport.
> Every time the block layer sends a REQ_FLUSH we fsync() now
> our backing file to guarantee data consistency.

This fixes the sync problem I saw before.  So:

Tested-by: Richard W.M. Jones <rjones@...hat.com>

Rich.

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