Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757194AbWKVXyj (ORCPT ); Wed, 22 Nov 2006 18:54:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757193AbWKVXyj (ORCPT ); Wed, 22 Nov 2006 18:54:39 -0500 Received: from main.gmane.org ([80.91.229.2]:2735 "EHLO ciao.gmane.org") by vger.kernel.org with ESMTP id S1757194AbWKVXyi (ORCPT ); Wed, 22 Nov 2006 18:54:38 -0500 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Gunter Ohrner Subject: Entropy Pool Contents Date: Thu, 23 Nov 2006 00:54:03 +0100 Message-ID: Reply-To: G.Ohrner@post.rwth-aachen.de Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7Bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: e179241233.adsl.alicedsl.de User-Agent: KNode/0.10.4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1646 Lines: 46 Hi! (PEBKAC warning. I'm probably doing something dump. I just don't know what...) I seem to have an entropy pool on a headless machine which is not nearly empty (a common problem in this case, I know), but completely empty and stuck in this state... Hornburg:~# cat /proc/sys/kernel/random/entropy_avail 0 Hornburg:~# fuser /dev/urandom Hornburg:~# lsof | grep random Hornburg:~# cat /proc/sys/kernel/random/entropy_avail 0 Hornburg:~# dd if=/dev/hdf of=/dev/urandom bs=512 count=1 1+0 records in 1+0 records out 512 bytes transferred in 0.016268 seconds (31473 bytes/sec) Hornburg:~# dd if=/dev/hdf of=/dev/random bs=512 count=1 1+0 records in 1+0 records out 512 bytes transferred in 0.031943 seconds (16029 bytes/sec) Hornburg:~# cat /proc/sys/kernel/random/entropy_avail 0 Hornburg:~# fuser /dev/urandom Hornburg:~# fuser /dev/random Hornburg:~# lsof | grep random Hornburg:~# cat /proc/sys/kernel/random/poolsize 4096 Hornburg:~# Also causing disk activities doesn't help at all. (Two disks on a Promise PDC20268 controller.) The system runs a rather ancient Debian Sarge 2.4 kernel: Linux Hornburg 2.4.27-3-386 #1 Thu Sep 14 08:44:58 UTC 2006 i486 GNU/Linux However as the machine itself is also ancient, the 2.4 seems like a good match. And also 2.4 ought to have a refilling entropy pool, doesn't it? Maybe someone can shed some light on what's happening here... Greetings, Gunter - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/