From owner-svn-src-head@FreeBSD.ORG Wed Jul 4 20:58:54 2012 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D6DBB106566B for ; Wed, 4 Jul 2012 20:58:54 +0000 (UTC) (envelope-from bounces+73574-9504-svn-src-head=freebsd.org@sendgrid.me) Received: from o3.shared.sendgrid.net (o3.shared.sendgrid.net [208.117.48.85]) by mx1.freebsd.org (Postfix) with SMTP id 768EA8FC18 for ; Wed, 4 Jul 2012 20:58:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sendgrid.info; h= message-id:date:from:mime-version:to:cc:subject:references :in-reply-to:content-type:content-transfer-encoding; s=smtpapi; bh=RkSXblc+fAktEAm6qGXlSrZmabY=; b=ldiSAjQcumXzDtdSuGEAhrH0okpr jmpL4twA8NpRLWA/rrtF3od7QsaP5hkFUy5MoMo1OKjJ56JIcost3mH6ObY47BlN fX1VByW7S7VItoADurMRuJZzzc6g6bz3mynsUc28U9K8TBIR8So9exuK8jcioz+A oUqBswp5PD3/ckI= Received: by 10.4.35.224 with SMTP id mf3.15528.4FF4AE8C3 Wed, 04 Jul 2012 15:58:52 -0500 (CDT) Received: from mail.tarsnap.com (unknown [10.9.180.5]) by mi2 (SG) with ESMTP id 4ff4ae8c.33dc.13feb1 for ; Wed, 04 Jul 2012 15:58:52 -0500 (CST) Received: (qmail 79274 invoked from network); 4 Jul 2012 20:57:29 -0000 Received: from unknown (HELO clamshell.daemonology.net) (127.0.0.1) by ec2-107-20-205-189.compute-1.amazonaws.com with ESMTP; 4 Jul 2012 20:57:29 -0000 Received: (qmail 5312 invoked from network); 4 Jul 2012 20:58:31 -0000 Received: from unknown (HELO clamshell.daemonology.net) (127.0.0.1) by clamshell.daemonology.net with SMTP; 4 Jul 2012 20:58:31 -0000 Message-ID: <4FF4AE77.6020809@freebsd.org> Date: Wed, 04 Jul 2012 13:58:31 -0700 From: Colin Percival User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:13.0) Gecko/20120627 Thunderbird/13.0.1 MIME-Version: 1.0 To: Attilio Rao References: <201207041951.q64JpPXu029310@svn.freebsd.org> <20120704200220.GM2337@deviant.kiev.zoral.com.ua> <20120704203239.GA42326@vniz.net> <8344944B-1CEE-4CAD-96FB-EC5A743F6909@FreeBSD.org> In-Reply-To: X-Enigmail-Version: 1.4.2 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Sendgrid-EID: EvYvoie/qnEezyq2t4eRKjDm9X7ZKbCMt75WvXA+XNEELRzgGiqFbJ+dYlkgv/AIscwsCrEMXm2LaSbas1VHHKqq9TKaeYPkiki5AfIday74EKzIcGDDV70G2p+tonorDe2KzJuGAhYPSsaRbeo0Y3npha/tOTRXGJlr4Diu5X0= Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r238118 - head/lib/libc/gen X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Jul 2012 20:58:54 -0000 On 07/04/12 13:45, Attilio Rao wrote: > I recall that at some point /dev/random was introducing some > scalability penalty on php [...] ... thus reinforcing the stereotype that PHP Does Stuff Wrong. Userland processes should get entropy from the kernel *once* at launch time and place it into an entropy pool which is *occasionally* reseeded later. If even a very slow /dev/random becomes a scalability problem, an application is doing something very very wrong. -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid