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=-0.6 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID autolearn=ham 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 0FCDFC433EF for ; Fri, 15 Jun 2018 17:34:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BF492208E5 for ; Fri, 15 Jun 2018 17:34:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="oSE3zWOB"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=ocallahan-org.20150623.gappssmtp.com header.i=@ocallahan-org.20150623.gappssmtp.com header.b="jNX4CpIu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BF492208E5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ocallahan.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966155AbeFOReq (ORCPT ); Fri, 15 Jun 2018 13:34:46 -0400 Received: from mail-lf0-f65.google.com ([209.85.215.65]:40381 "EHLO mail-lf0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965916AbeFOReo (ORCPT ); Fri, 15 Jun 2018 13:34:44 -0400 Received: by mail-lf0-f65.google.com with SMTP id q11-v6so15743033lfc.7 for ; Fri, 15 Jun 2018 10:34:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:reply-to:sender:in-reply-to:references:from:date :message-id:subject:to:cc; bh=jNSMR4jKCe5vKwrCl3MoVcLAW8SWBGV0SaUDPRWevNQ=; b=oSE3zWOB7LTrB2JroHrDyEuW3lDX8n4DZK+XFKjklfk+0GJ5lUk/pUgPfrRDyucL1q XQ+mPy/Dn2j+Rvg4ETQJQYuZsvxGeMx5fEnTY+/9/XLxgPIu2D0VfPfVWOgzxlK82AMg fvw0rHg3ulU8r2DPDk6GHnU2d+f46qjye9bolkyl9TR2JnB8SHFdTsaq2P2VdK+06oCA xrvGF75gfNitMoO8Pw9j7Ive0No0WQlUIljyE61/YPxn4zyvvDq4QcrhJsSGmQzfU9wU W0D4fPfmq+/3E26QvBZy7/F6dOz6fcqkRald9GQO8O+BKQsoc2LCeb+D9PQXB4x+mSXL EBQA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ocallahan-org.20150623.gappssmtp.com; s=20150623; h=mime-version:reply-to:sender:in-reply-to:references:from:date :message-id:subject:to:cc; bh=jNSMR4jKCe5vKwrCl3MoVcLAW8SWBGV0SaUDPRWevNQ=; b=jNX4CpIuylRbjQUfO8rNz8LIIIHLbpFxlT2dj7smC3lIo4QrDA5uAihWldFEeVs15J w0YHCTYzMDLnU2LWtNEIAQiczOtDrHpgxDgu293ev1CC1/BfRLMLzO/Ksk5DgWEwUHGl OuT3AksNoqlpbCNUD/R6DvfXtx+7D6iqCjujIopx0dCERK8/JarMhFUSvUZ7QxcQ34Tw gPgROO3Kwj0WbA4EArMCdlpxACzfQYsSfrq2R9TAEOnyIIO9YgR6jtOIFSCXugkXHjAz RN7SeUQWj5iJiOw7Jyk1/4bpBNUGE65hiQYl+nOVbDPWRG6T+jm6+/R16Y3+zU1zevLu jOXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:reply-to:sender:in-reply-to :references:from:date:message-id:subject:to:cc; bh=jNSMR4jKCe5vKwrCl3MoVcLAW8SWBGV0SaUDPRWevNQ=; b=puJuWusWEGDwQ0WSwTpMMmoYsTubGanNseEwJ+B77974E6X5lOJz+J6a6VhqrlHoji CxWjjx1PBYz8oL3ezDs9yt1gpYMN+Kou7ZFZCuYo3leEE2zTMkNCLKdUJWv6uvRFWll4 9iSPYnwOsbDw1blaa85nqFMLr0QmxkWWx30Hiepe27o9xpUUwdNiOI7T+TXTQEN2VYi2 5GfEscc0pp082GJLxKjqPgSwSnekmtt+8yK9C7Xw+tg0ZpIixfZI/AMEnRqDGDJhiFCv PKczpzCzD5zDhcquNfHkNbqctqSYXzHJzoV1K7NGquVNOFBFTOaXDCfKH3kkf9s/XsHS zA5A== X-Gm-Message-State: APt69E04TX6MagAiT+ScytrixVcnSzIWLxqwMgJWhl6w+xrfidvpAdDw Gy5bTjnxgj9QbAL9TJkT5K3LYLHH5wPRm9deY+s= X-Google-Smtp-Source: ADUXVKImhDBkq4NOKq+M0eOB5baMwtV3emIQNnjqp9r2scawQNnkY6RzszeqzyIJg5DV5UVQ0lGnabW+6ImqN3msqeM= X-Received: by 2002:a19:f71a:: with SMTP id z26-v6mr1677498lfe.137.1529084083243; Fri, 15 Jun 2018 10:34:43 -0700 (PDT) MIME-Version: 1.0 Reply-To: robert@ocallahan.org Received: by 2002:a2e:2991:0:0:0:0:0 with HTTP; Fri, 15 Jun 2018 10:34:42 -0700 (PDT) In-Reply-To: References: <1529057003-2212-1-git-send-email-yao.jin@linux.intel.com> <1a442b37-7a97-86f0-11e3-58d940ecfbc9@linux.intel.com> From: "Robert O'Callahan" Date: Fri, 15 Jun 2018 10:34:42 -0700 X-Google-Sender-Auth: 6KFBjjsvobhNeNDFnxkuLr-ce_s Message-ID: Subject: Re: [PATCH v1 0/2] perf: Drop leaked kernel samples To: Kyle Huey Cc: "Jin, Yao" , acme@kernel.org, jolsa@kernel.org, "Peter Zijlstra (Intel)" , Ingo Molnar , Alexander Shishkin , open list , Vince Weaver , Will Deacon , Stephane Eranian , Namhyung Kim , ak@linux.intel.com, kan.liang@intel.com, yao.jin@intel.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 Fri, Jun 15, 2018 at 10:16 AM, Kyle Huey wrote: > > If you want a sysctl for your own reasons that's fine. But we don't > want a sysctl. We want to work without any further configuration. Also toggling a sysctl would require root privileges, but rr does not currently need to run as root. Thus rr users would have to either permanently change their system configuration (and every extra configuration step is a pain), or run rr as root so rr can toggle the sysctl itself. Running rr as root is highly undesirable. Rob -- Su ot deraeppa sah dna Rehtaf eht htiw saw hcihw, efil lanrete eht uoy ot mialcorp ew dna, ti ot yfitset dna ti nees evah ew; deraeppa efil eht. Efil fo Drow eht gninrecnoc mialcorp ew siht - dehcuot evah sdnah ruo dna ta dekool evah ew hcihw, seye ruo htiw nees evah ew hcihw, draeh evah ew hcihw, gninnigeb eht morf saw hcihw taht.