From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (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 EB5AE5237AF for ; Mon, 7 Sep 2026 19:26:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788809209; cv=none; b=c8S+L5Z3nCeneMZ7wPZC5KLVL/dHkJMzqAdCGR+9Dm+jwBHTk4c9pas8YrMXW5q68nOLhsLXYqVv24gLcnvHXCIQgcL13RAJeRc3px9C0OfCHBZdJ9lm4vkVDNlzXsFz6p0tYfRCBi0QHVJvjkGmW1ji4DguPjSj8cba8MwC/QU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788809209; c=relaxed/simple; bh=CtJ8q8kbEUd6g45ORVI0A6KWkYr13cHySrmAqLHjPKY=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=GraQfLJKoVMghbRJqIHMCUOZCFpWFstuV2qoV15x6Xvws+Z122UDuht9Dd9+mVOdB7KvkrMBu8ezfQgchQqB9g3WhCqyISDfdC1L0W5HhTvVk1pu+2PCENbBQ7ik8y/9uFYwzCbkyoEv8GFuXVhIyaXChmfYs4fcEqSCABmPNTM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=BKWEa+hZ; arc=none smtp.client-ip=209.85.128.69 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="BKWEa+hZ" Received: by mail-wm1-f69.google.com with SMTP id 5b1f17b1804b1-49cf5bd2f12so53445465e9.1 for ; Mon, 07 Sep 2026 12:26:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1788809206; x=1789414006; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:mime-version:date:from :to:cc:subject:date:message-id:reply-to:content-type; bh=of6uK1RnEyk+91wfito6ZrIb5ocLj56BZQd0yrWJWW8=; b=BKWEa+hZ9dnttBb6C4hOLX6BW9QYNEAi4sHoVFyfNWHKks+//N1SpaZiHzzUm0Uk/V zF0aSfERng1LEPJ6FPaTbrwEI7WPoSdYP5CVYgOarYgL4sH3LHhQcId9JQyYLEvnAGIb vPTDJswpG21cxT03huhGhqe4dqJc2nuf71kboIP4sK0vx8rrtKvoL/C7y7U9DY9hB4iS Owrggo5Tnq7C+q7XiDrJck+y1McB7it1dntvwhQv4gEZn4zhF8/AnWyI5y/X4D8p/2/c W5zcGjzqGIEvUZQrj8NCAkk/R1fbh/1aqaTC8l/fIEkuP84VolYkEPcoDMCBU51zToAY /fow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788809206; x=1789414006; h=content-type:cc:to:from:subject:message-id:mime-version:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=of6uK1RnEyk+91wfito6ZrIb5ocLj56BZQd0yrWJWW8=; b=oRCujIHZD6JQRRqBWYOMPAFztupwWKnulgtxq7RoFTUBTdmSFCcvRWkInxD/ZThk4R 5qnA0xcp3aJQVd/i4xwPzTDetFB37f7A15BKeBqCuE1o4PKjhEha4t9Mp3zYGhVbZv4G i+KiIf1wI3oyN68RiFyQ3n3v+ZEtYguf9OWZwsNe8U1GL2FC8RVXYcqz+XlXVobXC+qI I6+VML0m+ikXKT8JjeOe0HCYyRHkurz7qWr/4LYfEqxsImFSg/wfe0RSkEskQjVaBP5T dHDHTwrus6v+uMrSq5GVfNQ6Z1F4LzBXZxrZtT39mQaR3ibnz38iRsHQfqQo+0cFg7Ux EoyQ== X-Forwarded-Encrypted: i=1; AKwUvBwrZeAn1w1JPjefEXUd0XBPkiZuqjX2FM1EWOwbcWhtl2eFUppR5/rv83ypXgO727ps/0ssIJW9ImR8LlI=@vger.kernel.org X-Gm-Message-State: AFuF++k97g13Ep+KMF5CG64N6vH6VxHPkcntGyT/+RY9od8Q80lkW6kI 0W2fvFoNwCc/KLjYAMLY/IOE3k0CPwnMv65ms8XIUgUAk8fnMTlwBMBCH9y9fU6FUzVBaSxHNRl Gji2lbSAmIFxb0ZK0FS/i5g== X-Received: from wmpw35.prod.google.com ([2002:a05:600c:9a3:b0:49d:84d:6053]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:628c:b0:49c:e1cd:536 with SMTP id 5b1f17b1804b1-49d17a8745bmr22250585e9.12.1788809205887; Mon, 07 Sep 2026 12:26:45 -0700 (PDT) Date: Mon, 7 Sep 2026 20:26:41 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.55.0.979.g7e5102b832-goog Message-ID: <20260907192643.42513-1-vdonnefort@google.com> Subject: [PATCH v1 0/2] ring-buffer: Fix and unify size and page calculations From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, linux-trace-kernel@vger.kernel.org Cc: mathieu.desnoyers@efficios.com, kernel-team@android.com, linux-kernel@vger.kernel.org, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" This short series unifies minimum page calculation for ring buffers and fix a small issue with the number of pages calculation for trace remotes. Vincent Donnefort (2): tracing/remotes: Account for ring buffer page header in size calculation ring-buffer: Unify ring buffer minimum page calculations include/linux/ring_buffer.h | 21 ++++++++++++++++++++- kernel/trace/ring_buffer.c | 30 ++++++++++++------------------ kernel/trace/simple_ring_buffer.c | 4 ++-- kernel/trace/trace_remote.c | 6 +++++- 4 files changed, 39 insertions(+), 22 deletions(-) base-commit: df2908090cda368b01ff43709f51890076c56157 -- 2.55.0.979.g7e5102b832-goog