Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757793AbeAINop (ORCPT + 1 other); Tue, 9 Jan 2018 08:44:45 -0500 Received: from mail-io0-f180.google.com ([209.85.223.180]:41455 "EHLO mail-io0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751825AbeAINoo (ORCPT ); Tue, 9 Jan 2018 08:44:44 -0500 X-Google-Smtp-Source: ACJfBos18kGb5Hf2QCP1Wsm6Aoeuguih0TX7fJ6yget+1QaMezvdNVy2CsL7rSFEyJOOVz1n+s/SuQ== From: Vince Weaver X-Google-Original-From: Vince Weaver Date: Tue, 9 Jan 2018 08:44:23 -0500 (EST) X-X-Sender: vince@macbook-air To: Peter Zijlstra cc: Ingo Molnar , linux-kernel@vger.kernel.org, Ingo Molnar , Arnaldo Carvalho de Melo , Thomas Gleixner Subject: Re: perf: perf_fuzzer quickly locks up on 4.15-rc7 In-Reply-To: <20180109132602.GA2369@hirez.programming.kicks-ass.net> Message-ID: References: <20180108173005.lkglqrixb2ota6g2@gmail.com> <20180109102507.GG6176@hirez.programming.kicks-ass.net> <20180109132602.GA2369@hirez.programming.kicks-ass.net> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On Tue, 9 Jan 2018, Peter Zijlstra wrote: > So remind me again, how are you running that fuzzer? I'm running > ./fast_repro99.sh as root. I'm running ./fast_repro98.sh on a regular haswell machine with paranoid set to "0". I'll try your patch and see if it makes a difference. I can also try on a few other machines. I started setting up a fuzzing cluster for this kind of thing but the multiport serial card I got for logging the serial consoles crashes fairly quickly under load and I haven't had time to track that down. Vince