Date: Sat, 01 Nov 2014 17:44:08 -0600 From: Ian Lepore <ian@FreeBSD.org> To: Dag-Erling =?ISO-8859-1?Q?Sm=F8rgrav?= <des@des.no> Cc: Adrian Chadd <adrian@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, Mark R V Murray <markm@FreeBSD.org>, Alexander Kabaev <kabaev@gmail.com> Subject: Re: svn commit: r273872 - in head: etc/defaults etc/rc.d libexec/save-entropy share/examples/kld/random_adaptor sys/conf sys/dev/glxsb sys/dev/random sys/kern sys/modules sys/modules/padlock_rng sys/mo... Message-ID: <1414885448.17308.236.camel@revolution.hippie.lan> In-Reply-To: <86mw8a5we0.fsf@nine.des.no> References: <201410302121.s9ULLsEw055630@svn.freebsd.org> <CAJ-Vmo=3At6wagbo1iqc_KAB3BvCh8cYcvPOD%2BppvNgmg7gXLg@mail.gmail.com> <20141101181536.2b6a5911@kan> <627C5F71-939A-4579-8A1B-45933662DAED@FreeBSD.org> <1414882185.17308.221.camel@revolution.hippie.lan> <86r3xm5wt6.fsf@nine.des.no> <86mw8a5we0.fsf@nine.des.no>
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On Sun, 2014-11-02 at 00:33 +0100, Dag-Erling Sm=F8rgrav wrote: > Dag-Erling Sm=F8rgrav <des@des.no> writes: > > From the code. This is a portion of the rc script that only runs at > > shutdown. If random_stop() runs during boot, something is seriously > > wrong *somewhere else* and you are welcome to help find out what. >=20 > I found it - postrandom triggers it. For now, just remove > /etc/rc.d/postrandom (I'm not sure it's really needed, there are better > ways to do this). >=20 > DES Yeah. I vaguely remember discussion about this something like 12-18 months ago. As I remember it, there was a desire to avoid using the same startup saved entropy on a rapid series of reboots and the thinking was to combat that by generating some fresh saved entropy on each boot. It seems like that should work if the old saved entropy were stirred in with the modicum of boot-time entropy before generating a new save file. Hmmm, but what if there is no saved entropy? Maybe that's what's happening here, given that a freshly created varmfs is involved. I was thinking maybe postrandom should only try to save a new file if there are some existing files to avoid the possibility of hanging. But when I look at postrandom more closely, it seems to be generating a save file, then deleting it along with all the other save files. -- Ian
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