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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 90DF7C7618F for ; Wed, 17 Jul 2019 01:02:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6698A20818 for ; Wed, 17 Jul 2019 01:02:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563325371; bh=0j/PDfjbKZ8HyyLM7MX7MpepDKqr0Mh2uqMNu9KnuCE=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=EO3oBIGH7qiNof4jCm5+AySSmMpaSpvSX6n/NjhAT4Xn+yppEiDdE9FOGPfBxXlaP rN2trRXIX1VRyztgGmjkb9Og05gsvm+Hh2VNeyDbdaujwrNY/fgsn8IQqR7uY8NXDX T/txpU3GjgG+bEM6jDruIbE51No9lxgDuinv7WHk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389005AbfGQBCt (ORCPT ); Tue, 16 Jul 2019 21:02:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:37996 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727956AbfGQBCt (ORCPT ); Tue, 16 Jul 2019 21:02:49 -0400 Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 24DAC20818 for ; Wed, 17 Jul 2019 01:02:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563325368; bh=0j/PDfjbKZ8HyyLM7MX7MpepDKqr0Mh2uqMNu9KnuCE=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=ko/VaNYYHCdQQwJnHtw6rI17uOwG3BSR/bPh7y2Tgk5uYruB3vdPtIZSeEmibnks+ K+LhhnJpOlpDPthQ95kiDChUJdhFce8uVwqwNdT1w96vKkUW8RQLgst9NtkBehPK2o W3CXugnNdOhFQa8VfNw8PZKxnwLFNIvzfE5cxaiQ= Received: by mail-wm1-f47.google.com with SMTP id l2so20378798wmg.0 for ; Tue, 16 Jul 2019 18:02:48 -0700 (PDT) X-Gm-Message-State: APjAAAWDij8FE8MwqOMa5hsm9jWvBU9VMFYEPw3HWSfLx1RdMORDopKa vJy9DUWqpkOxrkPdmYuLda1zidkzLVkB+N+tfExzlA== X-Google-Smtp-Source: APXvYqzJXl8DjEYeWzcicHDPjgF2x/4ykUesXghSvFSCWmtctaVJ6Gik3EwgLChxSFs7Z53lKkrj+cQbb706XM2bxA0= X-Received: by 2002:a7b:c4d2:: with SMTP id g18mr32901183wmk.79.1563325366760; Tue, 16 Jul 2019 18:02:46 -0700 (PDT) MIME-Version: 1.0 References: <20190711114054.406765395@infradead.org> <4c71e14d-3a32-c3bb-8e3b-6e5100853192@oracle.com> <97cdd0af-95cc-2583-dc19-129b20809110@oracle.com> In-Reply-To: <97cdd0af-95cc-2583-dc19-129b20809110@oracle.com> From: Andy Lutomirski Date: Tue, 16 Jul 2019 18:02:33 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v3 0/6] Tracing vs CR2 To: Vegard Nossum Cc: Peter Zijlstra , Thomas Gleixner , Borislav Petkov , Ingo Molnar , Steven Rostedt , Andrew Lutomirski , Linus Torvalds , linux_lkml_grp@oracle.com, "H. Peter Anvin" , Dave Hansen , Juergen Gross , LKML , He Zhe , Joel Fernandes , devel@etsukata.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 16, 2019 at 2:53 PM Vegard Nossum wrote: > > > On 7/16/19 9:33 PM, Vegard Nossum wrote: > > > > On 7/11/19 1:40 PM, Peter Zijlstra wrote: > >> Hi, > >> > >> Here's the latest (and hopefully final) set of tracing vs CR2 patches. > >> > >> They are basically the same as v2, with only minor edits and tags > >> collected > >> from the last review. > >> > >> Please consider. > >> > > > > Hi, > > > > I ran my own battery of tests on your patch set on top of > > 5ad18b2e60b75c7297a998dea702451d33a052ed and ran into this: > > On a different thread, Peter and I decided that the last patch in this series (the one that removes the _DEBUG stuff) is wrong. Can you see if these are reproducible with that patch removed? --Andy