From: Ben Hutchings <bhutchings@solarflare.com>
To: Patrick Simmons <linuxrocks123@netscape.net>
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH] Add IRQF_SAMPLE_RANDOM Flag to forcedeth
Date: Sun, 10 Oct 2010 02:09:24 +0100 [thread overview]
Message-ID: <20101010010924.GB15074@solarflare.com> (raw)
In-Reply-To: <4CB0FEA6.3030206@netscape.net>
Patrick Simmons wrote:
> This patch adds the IRQF_SAMPLE_RANDOM flag to the forcedeth driver,
> allowing the interrupt timing for forcedeth to be used for entropy
> generation. This should help /dev/random generate more secure random
> numbers on machines using this driver.
[...]
We don't enable this for network drivers any more because:
1. At high packet rates, interrupt moderation makes interrupts very
regular.
2. At low packet rates, a malicious sender can control the interrupt
timing.
Ben.
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
next prev parent reply other threads:[~2010-10-10 1:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-09 23:45 [PATCH] Add IRQF_SAMPLE_RANDOM Flag to forcedeth Patrick Simmons
2010-10-10 1:09 ` Ben Hutchings [this message]
2010-10-10 3:15 ` David Miller
2010-10-10 3:23 ` Patrick Simmons
2010-10-10 8:57 ` Eric Dumazet
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