linux-kernel - Re: Q: I/O to block devices

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Message-Id: <20061011180844.d7119152.akpm@osdl.org>
Date:	Wed, 11 Oct 2006 18:08:44 -0700
From:	Andrew Morton <akpm@...l.org>
To:	"Ulrich Windl" <ulrich.windl@...uni-regensburg.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Q: I/O to block devices

On Mon, 09 Oct 2006 13:39:34 +0200
"Ulrich Windl" <ulrich.windl@...uni-regensburg.de> wrote:

> I'm surprised: To my knowledge I/O to block devices is synchronous (at least write 
> I thought)

Nope.  But the kernel will sync the device on the final close.

Try doing `sleep 10000000 < /dev/sda &' and the run the tests...
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