linux-kernel - Re: [PATCH -v4] random: introduce getrandom(2) system call

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Message-ID: <1406731254.26034.4.camel@thorin>
Date:	Wed, 30 Jul 2014 16:40:52 +0200
From:	Bernd Petrovitsch <bernd@...rovitsch.priv.at>
To:	Bob Beck <beck@...nbsd.org>
Cc:	Pavel Machek <pavel@....cz>, "Theodore Ts'o" <tytso@....edu>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-api@...r.kernel.org,
	linux-crypto <linux-crypto@...r.kernel.org>,
	Theo de Raadt <deraadt@....openbsd.org>
Subject: Re: [PATCH -v4] random: introduce getrandom(2) system call

On Mit, 2014-07-30 at 07:56 -0600, Bob Beck wrote:
> Pavel. I have bit 'ol enterprise daemon running with established file
> descriptors serving thousands of connections
> which periodically require entropy.  Now I run out of descriptors. I
> can't establish new connections. but I should
> now halt all the other ones that require entropy?  I should raise
> SIGKILL on my process serving these thousands
> of connetions?  I don't think so.

If that long-running daemon periodically needs something from a device,
one would better keep the fd for that open the whole time. Saves some
CPU cycles and latency too BTW.

	Bernd
-- 
"I dislike type abstraction if it has no real reason. And saving
on typing is not a good reason - if your typing speed is the main
issue when you're coding, you're doing something seriously wrong."
    - Linus Torvalds

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