From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f43.google.com (mail-wr1-f43.google.com [209.85.221.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2AAC12E3703 for ; Tue, 15 Jul 2025 02:32:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752546723; cv=none; b=VvUKqWvD2FS32piDA3cHhdG8SkTziDwTZRDkOo+0feLWddJmYHhbyhnusLAaqsYpwmlSeLcbcerVR7nYp2DxiU+KAqJ49MddUnRKO+lsbExBvf0mrIqSgUYRZ7FuT15haRYylRA/keWbxFl7YXKhc+MCn9IJZsxf4ZfxjzDsKUg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752546723; c=relaxed/simple; bh=fR0qlZELmBxZw7OqKeaV3oWdRzzSwIw7kAKzZvw6HfI=; h=MIME-Version:References:In-Reply-To:From:Date:Message-ID:Subject: To:Cc:Content-Type; b=p8KOmSAv36j9fazebsaUfVXpw3t8k3Odsqqz0hx2+Vlv/Lqp2br7tipDTYGMqgetLLSBQJfdGk6xbkUu3IL/Y8+PFx6TNUa1MINgDzZ0F7JSFfzE8a7ncnQ/UgneKS2BbY9Gv5BVmhHwmJxq+s0/wyqHhgJO6se0G7nMYydx2Uc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=iTqIVgmn; arc=none smtp.client-ip=209.85.221.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="iTqIVgmn" Received: by mail-wr1-f43.google.com with SMTP id ffacd0b85a97d-3a6f2c6715fso3922428f8f.1 for ; Mon, 14 Jul 2025 19:32:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1752546720; x=1753151520; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=fR0qlZELmBxZw7OqKeaV3oWdRzzSwIw7kAKzZvw6HfI=; b=iTqIVgmn8Gs9oxzqqzaCVPTBjhve01H/enxyDER+ZtogerGJ/3z7gWYVqqjb4E2jQT Y76HBFCIPv6DNcAg8KqeESXDVoYOhCerZIp6RZ6wXwzcdVGRlNrwlmgHDtpPY4xBzTEd YacC3VNs94ubmKPO70KheoulQgjh1hKmY36JnPxaN1ucwrnUEboqmW34RFJfhT7rcNbg EekygLLaS8vhRmO5o9wYiezryTL7bG9gAP+XLIpmd59MwoYumjkPyH3jAFMmC8nrFXwZ NLxvt/s0cWnbuih4V958Waed9kyrf2eOiu/WNUUwoVTfabiGG1uY8lfpGxekT7dcqSpo LPPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1752546720; x=1753151520; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=fR0qlZELmBxZw7OqKeaV3oWdRzzSwIw7kAKzZvw6HfI=; b=QAg3fhA63jOp1lVE5+9ML8ryfYIx0FZ2sH/c+iVNMTAGLHvAt5OUnezBv914IpOOBw iePc+GPcMOMhiyUwEE3ZTcNnkesIgHknXmirD/PO7i2s1ZMt1xNFd2Rn5Xk4eWUwLK1u H8lS9vhdHqW5GuKhU5fc1hqV3e844r781FoXWlNfgKEpuA8P75dgU5vXEhKqQllfmah2 lEouVcRUjiYp2qZ0TXZJWA5ZqmsZzHxiBKtTGccSDOvXp7gNUOAh1D/UyAUvdV+fb4xw WVNV7lhApoQqVazGoh/gX1A4qrmCb/JBs5ipV2GQwSd6KNtLM2l5VPzVeO+K1SlcOiyV mYMw== X-Forwarded-Encrypted: i=1; AJvYcCU9BYq5OatfdCTWnSOf38NBLN/RBbhH5sNKvMadPGTwtoZ5xR4hXNe2jpLqmhR3eBRmpZU=@vger.kernel.org X-Gm-Message-State: AOJu0YyVTut8O6i3YXqsnBDmp2zzmnLEbRjLNN+Nhl43A0iU7IbHP/Qr QX/mt/lJKYHlTNGjxds/k31kErMj7FFrlUSu7IUEQHqVFstfTzXXcWssRJoMg1z9ZeHSkRRUBQ+ IQpD5kdErkSUZxmkmINpolc4unwqKIfk= X-Gm-Gg: ASbGncvjEhR9n661/hA3L5uX7weexngdqAjC8Tmt/4KduYM8o8fvLqyRQurMukE77Hr MGwFHu6n/Dw7Pb+9BGOiaF22ZrCWttN+RFEqrxBGGAieQya2uCS6ioA4GfFDIOrx4iWanWAuNau l6r9xib0TKhRfx1A0Bkc/Vx8jcvXwzF48cTkA6ltpGbFf1R1Mty7oUccC+MtyK/2jUc8sGWFnIP PzROj1QpJePym8ffr+lKxyjfnuxVdme0xLq X-Google-Smtp-Source: AGHT+IGD6OThceXqFkDBNZLfFYtzRdVV3q1zejLeHm6kL4mUFLANwMjxbNoX67cQpNCtzdzIdnyjXyvZaKc54uxDq58= X-Received: by 2002:a05:6000:2890:b0:3a5:27ba:47c7 with SMTP id ffacd0b85a97d-3b5f2e2816amr12562371f8f.48.1752546720406; Mon, 14 Jul 2025 19:32:00 -0700 (PDT) Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20250703121521.1874196-1-dongml2@chinatelecom.cn> In-Reply-To: <20250703121521.1874196-1-dongml2@chinatelecom.cn> From: Alexei Starovoitov Date: Mon, 14 Jul 2025 19:31:49 -0700 X-Gm-Features: Ac12FXyv2Sh-8B6Bvi4MuREzI2OuhoI3Azzoo2AunWj_Ap1KCI1_s_WPTEtBEW8 Message-ID: Subject: Re: [PATCH bpf-next v2 00/18] bpf: tracing multi-link support To: Menglong Dong Cc: Steven Rostedt , Jiri Olsa , bpf , Menglong Dong Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, Jul 3, 2025 at 5:17=E2=80=AFAM Menglong Dong wrote: > > Besides the performance, we also need to make the global trampoline > collaborate with bpf trampoline. For now, FENTRY_MULTI will be attached > to the target who already have FENTRY on it, and -EEXIST will be returned= . > So we need another series to make them work together. This needs to be thought through from the beginning. Without it the feature is way too limiting. People have fentry attached 24/7. It's not merely tracing use case. fentry-multi has to be able to co-exist.