Received: by 2002:a05:6358:d09b:b0:dc:cd0c:909e with SMTP id jc27csp5790755rwb; Mon, 14 Nov 2022 09:27:50 -0800 (PST) X-Google-Smtp-Source: AA0mqf5JeYkKbehI7gb7z/u2q3mLKamNhKfF1w2C4cnnTQH8zSQ1fhzFTGGGXEHN9OBpZmgr1G2i X-Received: by 2002:a17:90b:3583:b0:212:fe9a:5784 with SMTP id mm3-20020a17090b358300b00212fe9a5784mr14432310pjb.91.1668446870295; Mon, 14 Nov 2022 09:27:50 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1668446870; cv=none; d=google.com; s=arc-20160816; b=du0SAuGMiC/l0Mo/XiuEf8FEEnwv5anQrYu7ABdb78WrBxJ5eDh1BUCaFUBHgnPf9b w3ygWWhBY1BiPc/AUdp5M8hnH+iHb/YQkN5rQfbAQl6e9C4YGyBdZzYDJK4MHa3p+wFR LMwTo51eTtOexJ/PVVOrRCuQ3hqM5e7WdrA6qAjsR353Wt5HTlG+PRg6bbXYOnuAkP6v zKVpFuczm2fM+KHznn5YEtWY7vdoXWeqRcM225WJuFs99uMvjKdmNpV7NxBx6i/dO6mW F3UxOIS5GOiYX8rW82dTbxDQbBdq7+lM5DIKC+zzWzgFNjbmrMUzO+DXrBKUbE66QYWy p43Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=5ns0yy0ULQDF2dtNBeYIWb9TOnfULAE8N+DOoq1BPFM=; b=jkf2ztx5UbB4SNaWEF64qtlmJadQK2ZZWQw4KyJi0G0xE6VDlSDGq+qosLcC5TeOtY SLlWFawmJhvRezfrjZEbyAw88D7kRpyoxyvt3d2FCVEzKHA5jzOiyC0OlrDtdhi9YidG xt9YDkL/1Yhu7HddD0FXGy+5wy+DAzdrOgEbRhqZG8V7uqd/0admHZvU57RxEZNTdxAc LRvpLxcC4PkagzVwXQ7P/2ia4vnJGDpB5LNAL2Ew0NzqegHNPdji9QgJBJv0GC1PL7Ms +cmAV38NiI7/VgIV4zCDZ1dFgqjGElxTqh8Qu4pqhGF4Tw8LGP55Lbohz1GmpHuTBE7v dTZw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id e19-20020a170902e0d300b00186881e1ff0si8964712pla.302.2022.11.14.09.27.39; Mon, 14 Nov 2022 09:27:50 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237379AbiKNRXD (ORCPT + 88 others); Mon, 14 Nov 2022 12:23:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236517AbiKNRWb (ORCPT ); Mon, 14 Nov 2022 12:22:31 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86DB421E27 for ; Mon, 14 Nov 2022 09:22:30 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 46B92B8109D for ; Mon, 14 Nov 2022 17:22:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 34405C433C1; Mon, 14 Nov 2022 17:22:27 +0000 (UTC) Date: Mon, 14 Nov 2022 12:23:06 -0500 From: Steven Rostedt To: Jianlin Lv Cc: alison.schofield@intel.com, davidgow@google.com, thunder.leizhen@huawei.com, jianlv@ebay.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] tracepoint: Allow livepatch module add trace event Message-ID: <20221114122255.72588f45@gandalf.local.home> In-Reply-To: <20221102160236.11696-1-iecedge@gmail.com> References: <20221102160236.11696-1-iecedge@gmail.com> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2 Nov 2022 16:02:36 +0000 Jianlin Lv wrote: > In the case of keeping the system running, the preferred method for > tracing the kernel is dynamic tracing (kprobe), but the drawback of > this method is that events are lost, especially when tracing packages > in the network stack. I'm not against this change, but the above is where I'm a bit confused. How are events more likely to be lost with kprobes over a static event? -- Steve