Date: Wed, 04 Jul 2012 13:58:31 -0700 From: Colin Percival <cperciva@freebsd.org> To: Attilio Rao <attilio@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r238118 - head/lib/libc/gen Message-ID: <4FF4AE77.6020809@freebsd.org> In-Reply-To: <CAJ-FndAGgkgi5W3LqgMkeK9AquQ=1RhhYcj4jnLmuRg2EwVuqA@mail.gmail.com> References: <201207041951.q64JpPXu029310@svn.freebsd.org> <20120704200220.GM2337@deviant.kiev.zoral.com.ua> <20120704203239.GA42326@vniz.net> <8344944B-1CEE-4CAD-96FB-EC5A743F6909@FreeBSD.org> <CAJ-FndAGgkgi5W3LqgMkeK9AquQ=1RhhYcj4jnLmuRg2EwVuqA@mail.gmail.com>
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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
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