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,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,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 9317DC32771 for ; Mon, 20 Jan 2020 22:25:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 64E772253D for ; Mon, 20 Jan 2020 22:25:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="cyEOldZv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727289AbgATWZq (ORCPT ); Mon, 20 Jan 2020 17:25:46 -0500 Received: from mail-oi1-f194.google.com ([209.85.167.194]:46693 "EHLO mail-oi1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726752AbgATWZq (ORCPT ); Mon, 20 Jan 2020 17:25:46 -0500 Received: by mail-oi1-f194.google.com with SMTP id 13so750971oij.13; Mon, 20 Jan 2020 14:25:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=iTPep2W7UwVeIZMm8WjEHSoy+SW5Y3J2SshdpaxNQvs=; b=cyEOldZvI1XX0p3OtEkJp8j0rHACG/6fsXC57nk04r4DAFsobmen2NeoRyoMGfN17C 4/H952OLxM0HnFoaY3rLbUWbhZ2uirP1ulrzRrR68vUE8RWcm7ntKnUlaJ5mzNJjr6wa ZTBqHMux/Si62iIXrhdCzsFKu0fdPgWp2hFRThl27EBF67nExLBTzU3lO3CoAXQz6F3f T5qU5NOmgckqy8MeqJoEPUNSlW0zYDC+Ku+vy5l1RqtV9Rz5A1H2b84Bi4gcd6Mzxp+n Vbgi5cVOAUURsaB7OCfcTJB/VjS2DhH5n1FzNDQV06Qrc3FR3nMQpaiCQHjUVt/NTFrY A4Rw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=iTPep2W7UwVeIZMm8WjEHSoy+SW5Y3J2SshdpaxNQvs=; b=Lj9WKHIWCQmS2KU1BTYpsipp8VBXRBXQpbifdPL6MfUw4MHn7UPPXiVJAKKrNXaqGY er26NwWLinri77NTSbvvHaxTERXd/gGqQA5msSfI60ho5ru9cpRWdkB33uXLdTnPERiM IRLDXoE6UO79tPF5Ky7Oy4qQEkqcpzWAt8OLhCMUpz9RCsoRC08EqVKBfh1BtLUxJax4 wxgX84p2M2QJ23A9Lf4eRuooYWuROmPsnN20gCr8WEfRmtAPLzmT5v07aYqv+me1Zi9y 1yK7kdLuh4vNSgYIkJ7ZWvheBSVTjR6rXNWqMtP+hDb80t3ptPjytZXk8TVRNVwkdgo7 0fDA== X-Gm-Message-State: APjAAAVkoUWLSqSOF6pKQHW6DC+1rGwv9I0h82Fu3vri6TpNw8lXKrSF VehrkO4pqDxKwkCbfB/fnqt8z/Db+AfXYuPBCunQItli X-Google-Smtp-Source: APXvYqwq0b2pMVQJOfgCMPHaSxATrV3Ufremupr1l64dVBNqdAL+wUSdN7MtzrC/KTaQiRiNedf6zR6k9Dg75LGTZuQ= X-Received: by 2002:aca:3cd7:: with SMTP id j206mr822744oia.142.1579559145464; Mon, 20 Jan 2020 14:25:45 -0800 (PST) MIME-Version: 1.0 References: <20200110221500.19678-1-xiyou.wangcong@gmail.com> <20200120132812.384274d3@gandalf.local.home> In-Reply-To: <20200120132812.384274d3@gandalf.local.home> From: Cong Wang Date: Mon, 20 Jan 2020 14:25:33 -0800 Message-ID: Subject: Re: [PATCH] block: introduce block_rq_error tracepoint To: Steven Rostedt Cc: LKML , linux-block@vger.kernel.org, Jens Axboe Content-Type: text/plain; charset="UTF-8" Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Mon, Jan 20, 2020 at 10:28 AM Steven Rostedt wrote: > The ring buffer will hold a pointer to a location that may no longer > exist, and cause a fault when read. Also, this makes the user space > utilities trace-cmd and perf useless to know what the name is, as they > read the raw ring buffer data directly. Yeah, my bad, I will send an updated patch. Thanks.