From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EAD97367F37; Thu, 5 Mar 2026 23:30:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772753409; cv=none; b=cXm0RvnYpxVnzyB+PFqtV+F2B5UYW0CQq5TVFWZHKmLBGxc7AT6hc28CsA7WEPh774a7v8z7yjtiAkhRSQt15B/Jk2V7mmx+ZWfl3IlvPGnRQCZsiZcT5fEPb7oN+iDBTsIddgGJr3Hcf6T/PrDVGkvF9vSqGSZpbJIwY/OVrJw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772753409; c=relaxed/simple; bh=5Kc270dFzQjR8Vm6+7T2HWXccxHdjgILIUdO6WaZwYU=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=A5I5bpSnXATqg9QUWB3f9znCBp4DcJchpJC/Rgq4pnP9lLYeETT/XGCALSLDTe6B5bLAv6UwlDyklhFoJbwWYVLwUE9aLcxMVziYjM0ov9FLYtyA0LuOjokOxOPId3j0/NwVruOC4rYHZWKx9FBv/hDdJj3+38V+J5EwtqEF2iA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dNGzaTX0; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dNGzaTX0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BE8E7C116C6; Thu, 5 Mar 2026 23:30:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772753408; bh=5Kc270dFzQjR8Vm6+7T2HWXccxHdjgILIUdO6WaZwYU=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=dNGzaTX0v5iOpOlwKPkM+8oECnSbesuoaA89DWsjNOZ6udpDHCLAP3uXm2hclyW8/ 3HdbhGDjJOrQe4sglWNPJWSvInrQmzZUxBZDFdD4Kg3M5l5WDq7FfP5IlqGXc0P/RN fqmF0l7AqPhVa60PFVq97lmz3h9J/WtQRMm5ejsiMsRSLrxbhsP7HB/vHeE25ZHMI8 sFXS2z4H8AQ4G+buseoRZl7l25/CB4XmeIH1/h9LA5Ux9B9vnVaOz6SLX6hCXeqJCp A/0K5OcoP5X0TXif7zlLKNiQ4W8Ga31Cp6AVF7f4grdF2FZk0L/Hz+EzjroI5ks2I6 gM+WdS7oXLIow== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id BA0093808200; Thu, 5 Mar 2026 23:30:09 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH bpf-next v4 0/3] Optimize kprobe.session attachment for exact function names From: patchwork-bot+netdevbpf@kernel.org Message-Id: <177275340855.3325345.9824882028753278157.git-patchwork-notify@kernel.org> Date: Thu, 05 Mar 2026 23:30:08 +0000 References: <20260302200837.317907-1-andrey.grodzovsky@crowdstrike.com> In-Reply-To: <20260302200837.317907-1-andrey.grodzovsky@crowdstrike.com> To: Andrey Grodzovsky Cc: bpf@vger.kernel.org, linux-trace-kernel@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, jolsa@kernel.org, rostedt@goodmis.org, linux-open-source@crowdstrike.com Hello: This series was applied to bpf/bpf-next.git (master) by Andrii Nakryiko : On Mon, 2 Mar 2026 15:08:34 -0500 you wrote: > When libbpf attaches kprobe.session programs with exact function names > (the common case: SEC("kprobe.session/vfs_read")), the current code path > has two independent performance bottlenecks: > > 1. Userspace (libbpf): attach_kprobe_session() always parses > /proc/kallsyms to resolve function names, even when the name is exact > (no wildcards). This takes ~150ms per function. > > [...] Here is the summary with links: - [bpf-next,v4,1/3] libbpf: Optimize kprobe.session attachment for exact function names https://git.kernel.org/bpf/bpf-next/c/6afc431db1b4 - [bpf-next,v4,2/3] ftrace: Use kallsyms binary search for single-symbol lookup (no matching commit) - [bpf-next,v4,3/3] selftests/bpf: add tests for kprobe.session optimization https://git.kernel.org/bpf/bpf-next/c/a28441dd2961 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html