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[209.132.180.67]) by mx.google.com with ESMTP id t25si1938398pgu.82.2018.04.24.08.50.26; Tue, 24 Apr 2018 08:50:40 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@thunk.org header.s=ef5046eb header.b=D3TqFCND; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751339AbeDXPtI (ORCPT + 99 others); Tue, 24 Apr 2018 11:49:08 -0400 Received: from imap.thunk.org ([74.207.234.97]:51780 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750779AbeDXPtH (ORCPT ); Tue, 24 Apr 2018 11:49:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=thunk.org; s=ef5046eb; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID: Subject:To:From:Date:Sender:Reply-To:Cc:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=IbC1XLAFn9jHtYXpVVr2HrFssKJ2baXs8maZAd6Ik48=; b=D3TqFCND1YrbRDwDRxLny+3b4I ReI9yVRhXcr3kCkPRIr71ARzx4MnHrYhVGshQka/k5m6VkRqUhneq6cJVNEzLwE7ZEVadeWH2Nuyw 3FssUbztgdics9gMNiH/z2qD1+5FzOfcmzSInvyAEC+2qBD5rcgyPpilGRizPpew7rJs=; Received: from root (helo=callcc.thunk.org) by imap.thunk.org with local-esmtp (Exim 4.89) (envelope-from ) id 1fB0Bl-0006ID-Si; Tue, 24 Apr 2018 15:49:05 +0000 Received: by callcc.thunk.org (Postfix, from userid 15806) id 643FE7A4557; Tue, 24 Apr 2018 11:49:04 -0400 (EDT) Date: Tue, 24 Apr 2018 11:49:04 -0400 From: "Theodore Y. Ts'o" To: Paul Menzel , linux-kernel@vger.kernel.org Subject: Re: Linux messages full of `random: get_random_u32 called from` Message-ID: <20180424154904.GC30619@thunk.org> Mail-Followup-To: "Theodore Y. Ts'o" , Paul Menzel , linux-kernel@vger.kernel.org References: <42c1b84b-ab1f-5577-6304-e0985a637cf9@molgen.mpg.de> <20180424135621.GD4189@thunk.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180424135621.GD4189@thunk.org> User-Agent: Mutt/1.9.5 (2018-04-13) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on imap.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 24, 2018 at 09:56:21AM -0400, Theodore Y. Ts'o wrote: > On Tue, Apr 24, 2018 at 01:48:16PM +0200, Paul Menzel wrote: > > Dear Linux folks, > > > > > > Since Linux 4.17-rcX, Linux spams a lot of `random: get_random_u32 called > > from` messages. I believe, this setting should be reverted by default as > > otherwise a lot of other messages are not seen. > > Can you tell me a bit about your system? What distribution, what > hardware is present in your sytsem (what architecture, what > peripherals are attached, etc.)? Can you also send me your dmesg or kern.log so I can see where get_random_u32 is getting called from during your system startup? Thanks! - Ted