From owner-svn-src-head@FreeBSD.ORG Sun Nov 2 19:15:04 2014 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 78F719C9; Sun, 2 Nov 2014 19:15:04 +0000 (UTC) Received: from mho-02-ewr.mailhop.org (mho-02-ewr.mailhop.org [204.13.248.72]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 47462900; Sun, 2 Nov 2014 19:15:03 +0000 (UTC) Received: from [73.34.117.227] (helo=ilsoft.org) by mho-02-ewr.mailhop.org with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.72) (envelope-from ) id 1Xl0cA-000GF3-5M; Sun, 02 Nov 2014 19:15:02 +0000 Received: from [172.22.42.240] (revolution.hippie.lan [172.22.42.240]) by ilsoft.org (8.14.9/8.14.9) with ESMTP id sA2JF1Z3090070; Sun, 2 Nov 2014 12:15:01 -0700 (MST) (envelope-from ian@FreeBSD.org) X-Mail-Handler: Dyn Standard SMTP by Dyn X-Originating-IP: 73.34.117.227 X-Report-Abuse-To: abuse@dyndns.com (see http://www.dyndns.com/services/sendlabs/outbound_abuse.html for abuse reporting information) X-MHO-User: U2FsdGVkX1+I3+3/pomxv7wQb6qein1I X-Authentication-Warning: paranoia.hippie.lan: Host revolution.hippie.lan [172.22.42.240] claimed to be [172.22.42.240] Subject: Re: svn commit: r273958 - head/sys/dev/random From: Ian Lepore To: Adrian Chadd In-Reply-To: References: <201411020201.sA221unt091493@svn.freebsd.org> <720EB74E-094A-43F3-8B1C-47BC7F6FECC3@grondar.org> <1414934579.17308.248.camel@revolution.hippie.lan> <6FB65828-6A79-4BDE-A9F7-BC472BA538CE@grondar.org> Content-Type: text/plain; charset="us-ascii" Date: Sun, 02 Nov 2014 12:15:00 -0700 Message-ID: <1414955700.1200.6.camel@revolution.hippie.lan> Mime-Version: 1.0 X-Mailer: Evolution 2.32.1 FreeBSD GNOME Team Port Content-Transfer-Encoding: 7bit Cc: "svn-src-head@freebsd.org" , "svn-src-all@freebsd.org" , "src-committers@freebsd.org" , Mark R V Murray X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.18-1 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: Sun, 02 Nov 2014 19:15:04 -0000 On Sun, 2014-11-02 at 11:05 -0800, Adrian Chadd wrote: > [snip all the conversation] > > Ok. There's still a problem that I can trigger by trying to Ctrl-C a > process that's blocked reading for randomness. I'll try to chase up > more details about and file a PR about it. > > The unfortunate part is that the kernel side stack trace of the > offending / hung process isn't currently helpful. :( > > > > > -adrian Possibly related... when I had the boot time save-entropy stuff stuck in a read yesterday I tried ^T and it first reported the hung process in a "block" wait. Any subsequent ^T showed the process as runnable and the cpu usage as 100%. This is on a single-core arm. -- Ian