From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E1F113A7F68; Mon, 25 May 2026 06:58:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779692329; cv=none; b=jDaCdHSGmEUvimgTjFJxP2OnKpfhYXtsQvzV7s7dep9ohZzCIIzRLhVqEBWh6HX1FtTsSCoUeUp/wgBKJLkQ/iENFlFgzfqQeTwQhZ06CKwBaZDLn5k92sn3nXCY2le4cOTeoE953d5CqCu6q8XH+HYznIGxcMDFTwjkr/9gI8M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779692329; c=relaxed/simple; bh=uCtAxEldoRH22CpG4fkZRj0mePT37G2v8r21dOq1gSw=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=m9ckw0Qlec8oRR2aRNXxwDkKXJ9FBk7ab2d7YliuL9CvMa7rrTtwbPzyuk/ZEZFS4wjjRyT8xgVlrpw+hAAPXCbTCQC3q9gLA38S24nWhngAudxgyTkzZoznaDsenZivfcHk4Ikxq4wOL9Gjqz/GQn38dpB9hBYuKpcO8l001VY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=flBwgnmt; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="flBwgnmt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E6DDC1F000E9; Mon, 25 May 2026 06:58:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779692325; bh=OKHcCSh/5UARppAcfMiYEQyBQ3tGtdQ1BhYUBy/jnPs=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=flBwgnmtE57H9zF3clGAshvA4+Rj4r4ALj+FvTjwn6RoyyWuO0am5BXa3Sj08tk9C yAU+WaJPGwZ8AT/lGGvqZWYAhL4kAPjDAe35WPt1oMFb+bWJPjII07jrH5lpQLTKKh jXdmuFkTEnFvpfE/6auq978iBSq3fR8KfD8uq+qtx+S/yl6LXCiVrdIysQD49sQ07t jywWWJpy/Q5FdZyQ3wLq9m7/uvSHIC3LwTPxUy+8ddXo6vCBo9+Zmt71Kb6I1XVjmo ZL9fQoLmTkzWr/gGktSLWggu+qPyFfVv3zgMUDhOL5UzxlfPKY4svcYxi03mcFhh6T fdKU8LuzANmrw== Date: Mon, 25 May 2026 15:58:41 +0900 From: Masami Hiramatsu (Google) To: Li Pengfei Cc: linux-trace-kernel@vger.kernel.org, rostedt@goodmis.org, mhiramat@kernel.org, linux-kernel@vger.kernel.org, cmllamas@google.com, zhangbo56@xiaomi.com, lipengfei28@xiaomi.com, lkp@intel.com Subject: Re: [RFC PATCH v2 0/3] trace: stack trace deduplication for ftrace ring buffer Message-Id: <20260525155841.b15adcd50d25485aab287043@kernel.org> In-Reply-To: <20260522104017.1668638-1-lipengfei28@xiaomi.com> References: <20260514034916.2162517-1-lipengfei28@xiaomi.com> <20260522104017.1668638-1-lipengfei28@xiaomi.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Hi Pengfei, On Fri, 22 May 2026 18:40:14 +0800 Li Pengfei wrote: > From: Pengfei Li > > Hi Steven, all, > > This is v2 of the ftrace stackmap series. It addresses the Sashiko > review at [1] and incorporates the kernel test robot's toctree fix. > > The series adds stack trace deduplication to ftrace. When the > stacktrace option is enabled, the ring buffer stores a 4-byte > stack_id instead of a full kernel stack trace, while the full > stacks are exported via tracefs. Sashiko still made some comments on the series. Please review it. https://sashiko.dev/#/patchset/20260522104017.1668638-1-lipengfei28%40xiaomi.com And reply to the comment on this thread, so that we can discuss it here. Thanks, -- Masami Hiramatsu (Google)