From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f73.google.com (mail-wm1-f73.google.com [209.85.128.73]) (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 1880335E957 for ; Wed, 1 Apr 2026 02:51:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775011923; cv=none; b=AHkwrd7fEU5ygSPBQ5tssD08G+W2Hi9DCZFZVJTiFdzh7j/TFkQKXdPhsbuV8Zrsdx5yvvA3i7L508hXi6AR9u4AaQVAYj67zx65V9F+BN1dGwdV558V4EFV489QHOnxQHoQdPOJVHwplWhPMGRM1rFLIaRtock1xFzKgQFrhi8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775011923; c=relaxed/simple; bh=v8uP+loqAODVvNXhIzGHgbVhwp3PKZxKHMCifhit8Nc=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=qXTeueSkYMURmEOftzN/Zw4NObi8Ang9DgAWeQN1aPZ5Cj2R3NR0mQOsjme5qSi2EWcTgB1i6d155l4xb7CefghuvJYIXmNxfIozlGJZsbqb8s2YSb5CBYl9BUOx4SbzE3fi9IMqxwAZa5MUZiLoNwJXFv3TGUATTIWYNx8qx9s= 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=iqhpWdr+; arc=none smtp.client-ip=209.85.128.73 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="iqhpWdr+" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-486fc42c83aso50795405e9.0 for ; Tue, 31 Mar 2026 19:51:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1775011914; x=1775616714; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=nCQmN6VtcmQnyUl+5vnWl7vaYlGtjGH8RG3CJJU7FUw=; b=iqhpWdr+7y/jdNuRg9yYKq7PGWbRHL6EsSQd4X4PyGXBk7jwMqxUH0QDeAEu7ECLuk nv+ZvB+Oj2yuKl5jZScMxBpRBgJKaZKmFBqs8uacEhvCfLOmRP+TgCiFi3YoKG1KbfQ0 UxpDqwUcyP+nyHg0i7sEbB8Au47DSCoCeA0hWm23IMW9/UTFxRoHixFs4/0MQsfRVk/i LeKkCgdsWW6zbGVPsybfLtbEtCPIo5w0ZXz0odU3lfeu/Mgka+S/G0e0P0+SE7THmqWg rCtt1g7S7jhkyFIhr4LsRQITC+d6WmeXxbUfSBqVZpsTExOUvr2ln/xz4SHgE7FTDfGp OcRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775011914; x=1775616714; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=nCQmN6VtcmQnyUl+5vnWl7vaYlGtjGH8RG3CJJU7FUw=; b=U52PEHzPHQ2Lf6LQGBiKjplINzsyeewO/JPLI7ECIFDGjjVzWiA5SNyoJQWk9Zy55/ 8woyTGJKM3eF3DQJtnC6JtROERxAF7emuoSFjEZzudomnD/LVCnwA47CroXT5mLtDwum TGU0fmvpDU6jCC1EB/tEnblw3+BVtpWStxGGVXpNzVAbAvVP7SPfChm41uAs3mXQjVua f+rjgJPszv5CDmz4IqO/OSqu+SuskS2bGsf/Bkw3qUVwHEN0cTw86I4P+h4eVnDIV58B BQIxA2GiD3lqVGPksUixt7Arqy77FwisfHtqVVFmAiiqq/mtusgLwg2KjuljAqXfYJ0u Dmnw== X-Forwarded-Encrypted: i=1; AJvYcCVVpQ6gYjBArBqUB63ty+pZagZO/vRaJpp4FFgLrN1wvjkv3fAmterp479Ylb4sm1PoD6bQDIQl/Vx+XWk=@vger.kernel.org X-Gm-Message-State: AOJu0YxhyiFRgg+YdxcDT4SZ+XLYyoTVEnbyCahdlmb45JujmrFZmr+Q KVoFvIC+UMxDbLWbVF9n1se775jV61qvj0LPucSfE5RfYQgp2Z4xuFDyTnUZsiqE//WtVkS7O4m anknMWhrqc6AKu0vTWjyYcw== X-Received: from wmpv8.prod.google.com ([2002:a05:600c:4d88:b0:485:696a:671a]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:1d16:b0:485:3e19:9e01 with SMTP id 5b1f17b1804b1-4888359d2afmr26992145e9.28.1775011913424; Tue, 31 Mar 2026 19:51:53 -0700 (PDT) Date: Wed, 1 Apr 2026 03:50:01 +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 2.53.0.1118.gaef5881109-goog Message-ID: <20260401025003.3258729-1-vdonnefort@google.com> Subject: [PATCH 0/2] Fix trace remotes read with an offline CPU From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, maz@kernel.org Cc: kernel-team@android.com, linux-kernel@vger.kernel.org, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" This small series is fixing non-consuming read of a trace remote when the trace_buffer is created after a CPU is offline. It also extends hotplug testing coverage to include this test case. I have based this series on top of kvmarm/next which contains the hypervisor tracing patches. Vincent Donnefort (2): tracing: Non-consuming read for trace remotes with an offline CPU tracing: selftests: Extend hotplug testing for trace remotes kernel/trace/trace_remote.c | 21 ++++- .../selftests/ftrace/test.d/remotes/functions | 15 +++- .../ftrace/test.d/remotes/hotplug.tc | 86 +++++++++++++++++++ .../test.d/remotes/hypervisor/hotplug.tc | 11 +++ .../selftests/ftrace/test.d/remotes/trace.tc | 27 +----- .../ftrace/test.d/remotes/trace_pipe.tc | 25 ------ 6 files changed, 129 insertions(+), 56 deletions(-) create mode 100644 tools/testing/selftests/ftrace/test.d/remotes/hotplug.tc create mode 100644 tools/testing/selftests/ftrace/test.d/remotes/hypervisor/hotplug.tc base-commit: 5ad2ff071b5980f072a85c8114649218971c586e -- 2.53.0.1118.gaef5881109-goog