From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16BC8C4CECC for ; Sun, 15 Sep 2019 18:37:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF6C121479 for ; Sun, 15 Sep 2019 18:37:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726597AbfIOShP (ORCPT ); Sun, 15 Sep 2019 14:37:15 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:45410 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726246AbfIOShP (ORCPT ); Sun, 15 Sep 2019 14:37:15 -0400 Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id x8FIaxtl023186; Sun, 15 Sep 2019 20:36:59 +0200 Date: Sun, 15 Sep 2019 20:36:59 +0200 From: Willy Tarreau To: Linus Torvalds Cc: "Theodore Y. Ts'o" , "Alexander E. Patrakov" , "Ahmed S. Darwish" , Michael Kerrisk , Andreas Dilger , Jan Kara , Ray Strode , William Jon McCann , zhangjs , linux-ext4@vger.kernel.org, lkml , Lennart Poettering Subject: Re: [PATCH RFC v2] random: optionally block in getrandom(2) when the CRNG is uninitialized Message-ID: <20190915183659.GA23179@1wt.eu> References: <20190911173624.GI2740@mit.edu> <20190912034421.GA2085@darwi-home-pc> <20190912082530.GA27365@mit.edu> <20190914122500.GA1425@darwi-home-pc> <008f17bc-102b-e762-a17c-e2766d48f515@gmail.com> <20190915052242.GG19710@mit.edu> <20190915183240.GA23155@1wt.eu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190915183240.GA23155@1wt.eu> User-Agent: Mutt/1.6.1 (2016-04-27) Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org I also wanted to ask, are we going to enforce the same strategy on /dev/urandom ? If we don't because we fear application breakage or whatever, then there will always be some incentive against migrating to getrandom(). And if we do it, we know we have to take a reasonable approach making the change transparent enough for applications. That would too go in favor of a short timeout. Willy