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Date: Sat, 14 Oct 2006 02:47:24 +0900
From: Akinobu Mita <akinobu.mita@gmail.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, ak@suse.de, Don Mullis <dwm@meer.net>
Subject: Re: [patch 1/7] documentation and scripts
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On Thu, Oct 12, 2006 at 02:37:13PM -0700, Andrew Morton wrote:

> So I wonder if it'd be better to make this have units of "one millionth",
> or simply make this tunable "1/(probability of failure)".  So setting it to
> 1,000,000 gives you one failure per million calls, on average.

/debug/*/interval is available for this purpose.
The combination of below commands gives one failure per million calls.

# echo 1000000 > /debug/failslab/interval
# echo 100 > /debug/failslab/probability