linux-kernel - Re: [PATCH v6 0/5] /dev/random

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Message-ID: <20160819055612.GA20427@gondor.apana.org.au>
Date:   Fri, 19 Aug 2016 13:56:12 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Theodore Ts'o <tytso@....edu>, Pavel Machek <pavel@....cz>,
        Stephan Mueller <smueller@...onox.de>, sandyinchina@...il.com,
        Jason Cooper <cryptography@...edaemon.net>,
        John Denker <jsd@...n.com>,
        "H. Peter Anvin" <hpa@...ux.intel.com>,
        Joe Perches <joe@...ches.com>,
        George Spelvin <linux@...izon.com>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 0/5] /dev/random - a new approach

On Thu, Aug 18, 2016 at 10:49:47PM -0400, Theodore Ts'o wrote:
>
> That really depends on the system.  We can't assume that people are
> using systems with a 100Hz clock interrupt.  More often than not
> people are using tickless kernels these days.  That's actually the
> problem with changing /dev/urandom to block until things are
> initialized.

Couldn't we disable tickless until urandom has been seeded? In fact
perhaps we should accelerate the timer interrupt rate until it has
been seeded?

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt