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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 D1754C4646D for ; Sat, 11 Aug 2018 06:14:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 76094223F8 for ; Sat, 11 Aug 2018 06:14:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="vWAY5wcJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 76094223F8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com 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 S1727290AbeHKIrG (ORCPT ); Sat, 11 Aug 2018 04:47:06 -0400 Received: from mail-qt0-f195.google.com ([209.85.216.195]:39166 "EHLO mail-qt0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727088AbeHKIrG (ORCPT ); Sat, 11 Aug 2018 04:47:06 -0400 Received: by mail-qt0-f195.google.com with SMTP id q12-v6so12581462qtp.6 for ; Fri, 10 Aug 2018 23:14:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=6VmG1RyVENc8mmnW0eOrrpkUlIOoG8loqawhUUTZdMA=; b=vWAY5wcJS1gplO5dSmb3jnOqU5p1fqDcwnhjcbcG5+clI5BQAjufI6qqdz0rPZP4Ls JMu8gaak9chBq5nsK4YyrL0aDxDHyXjaMbmdA8x+IAKmGpC3veL3aiZ1PPpvBKjB1MJF JpzlNOOCk0sD1GjkIdQ3+n47or8v0/z++0cd4J8lQBSqNZwHB6bWKD1ZwAWPZS2kZP+1 suSrsrNdv6/aqXJMbXHs7ytmlLRH5lQ1cSd+SeggMsTskM6CnDmG99FsYHCvM8Vm/G4p aMOCox6byGlThlUFYjLTQsDH/tFkGvfUIKHdQiVFSjllvTc/36NZ8GktQ3ElwD9t53gP s14w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=6VmG1RyVENc8mmnW0eOrrpkUlIOoG8loqawhUUTZdMA=; b=mfeHSsFnlpiDUOMrfSRDd5fZuJwwP+A1VBirCfe5vJlGhHfHsIcPygxfuwFyO5n2st PEGvx8awXVl2zyvSVqweUJin/ndKktrAZcRgGndzbpH7ku27Xvuo0MnKZJWWYUtoyaR/ lHlRi7nsgnneXDd9GSH3R72tv2TF1mthnzlwEM1A81kQ/JPTse3PlqJeTpdQX0kj4DsG BZ+TxtaVjT67XNAkrChLipyC1GohbZdRKMSkPs7iinHpngAFHfnCf/xmk2EaYcJcscMt RbtPn8LTufDYwbnowMchuu3xFLhVi2s2BpYO+BKCFL1CdmDiGR4hZymx1hXZHTjZ9kgK Uzug== X-Gm-Message-State: AOUpUlFvhQmrwhMvoiYSMgM6zw5iV/xgGulY8TQR8NatgzHCpGHz7xIc nOszp1VUhFpSgKi/87Uc3yIC5qTArdJmc0172E4= X-Google-Smtp-Source: AA+uWPyUpLiZ6AipTTolAPCfrCvUaxTSZVTmtH0orJ9isZI5hHoFN7u0qwPDXS566j9dVteVJYsJ5nAEHNgAtIP5mwE= X-Received: by 2002:ac8:1abd:: with SMTP id x58-v6mr9448098qtj.180.1533968041795; Fri, 10 Aug 2018 23:14:01 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a0c:c3cc:0:0:0:0:0 with HTTP; Fri, 10 Aug 2018 23:14:01 -0700 (PDT) In-Reply-To: <20180810155813.49259913@gandalf.local.home> References: <20180809041856.1547-1-ravi.bangoria@linux.ibm.com> <20180809041856.1547-4-ravi.bangoria@linux.ibm.com> <20180809143827.GC22636@redhat.com> <20180810155813.49259913@gandalf.local.home> From: Song Liu Date: Fri, 10 Aug 2018 23:14:01 -0700 Message-ID: Subject: Re: [PATCH v8 3/6] Uprobes: Support SDT markers having reference count (semaphore) To: Steven Rostedt Cc: Oleg Nesterov , Ravi Bangoria , srikar@linux.vnet.ibm.com, mhiramat@kernel.org, Peter Zijlstra , mingo@redhat.com, acme@kernel.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, open list , ananth@linux.vnet.ibm.com, Alexis Berlemont , naveen.n.rao@linux.vnet.ibm.com, linux-arm-kernel@lists.infradead.org, linux-mips@linux-mips.org, linux@armlinux.org.uk, ralf@linux-mips.org, paul.burton@mips.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, Aug 10, 2018 at 12:58 PM, Steven Rostedt wrote: > On Thu, 9 Aug 2018 16:38:28 +0200 > Oleg Nesterov wrote: > >> I need to read this (hopefully final) version carefully. I'll try to do >> this before next Monday. >> > > Monday may be the opening of the merge window (more likely Sunday). Do > you think this is good enough for pushing it in this late in the game, > or do you think we should wait another cycle? > > -- Steve We (Facebook) have use cases in production that would benefit from this work, so I would rather see this gets in sooner than later. After a brief review (I will more careful review before Monday), I think this set is not likely to break existing uprobes (those w/o ref_ctr). Therefore, I think it is safe to put it in this cycle. Thanks, Song