From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f180.google.com (mail-pl1-f180.google.com [209.85.214.180]) (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 312332F30 for ; Thu, 27 Feb 2025 02:47:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740624479; cv=none; b=n90fzuevi8h8UgqUHKFp9e18a/e8otHnIVn3si064xcW7Yt21hpaK/nPye0bLtt4LHEdLeHZbkx+H4S55wbEo05Nk767aUF8ReBD886SFPET7Z0VWe6wCV1KiqRTLj6iWCqfNJqygCzOGz4ZaNWOoUDXfM/sSYsqhFOK7DURaio= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740624479; c=relaxed/simple; bh=lFAmWhVshf9nFLUSX7hTW9ET7LdBAi3hgWF1ui25Hjg=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=XZOSgqKofuwv9kMKLQFjv9B7JJiWiZS7LP6PbtTnv/tFsHwMxT0R9svTyOwr0LI73Z3U/0rTgVE+Iut21eocq9bNAuce2lOwBUKXx7Y/9VqrfRzkEMY03jep7aWQRQhwxoi0516B1wIFoz4PobIhR6srwXTpd4z6gku8JQys9KU= 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=FHldYEM0; arc=none smtp.client-ip=209.85.214.180 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="FHldYEM0" Received: by mail-pl1-f180.google.com with SMTP id d9443c01a7336-2211cd4463cso6972545ad.2 for ; Wed, 26 Feb 2025 18:47:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1740624468; x=1741229268; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=PdpN76I6zy3AIY7lfmKso6k+ocCBw3OaBuhvfcrFlT4=; b=FHldYEM0J1esT9mpS9qQfj1Og6JWtYOp3JgZh+B3cDP5Z7PloLPeeyYtFh9CjtcOaW IGEql+dhbRDrhxezVKHSviSwcLcFDETIkSJZP0QEgBsmDg47yhRAFonWsNXvoMZdGndS hUDkC6qLOIrUl3HRdByD5cjhIuAwwy82JWFs/NeLF55AlNDMyaaYKlL6H3TjRVdt+WDS UfgdxJBdyx18FiXZ/ivGI1nvloL0RK6KANokzpIvmH2d14N0WV9Au8swsrHJQikSN0pK pstmGtdrerx5CekgyJeO63v8E/c1kAYzbIlK9WqFygoLIbThmEydXuwPLNNnctS3DOX8 iDRQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740624468; x=1741229268; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=PdpN76I6zy3AIY7lfmKso6k+ocCBw3OaBuhvfcrFlT4=; b=aYGru7ju+gVC06cpr6XOgaLbjEvz7D3IIlBorqtOrheiE0ltPJLzIRoRPuv1Jv2Nzg 5DKMZfm56EXtV0v+DtDMqDtI5i1vFBdIPosmtG0t/qptSdisZJXStSzUdb67JR1K5kbQ misxj4nBFo5LTt/A2PlpuVzoxC5rNiztIvBvESzQUY3BvuE86/+tnWlDSg1XNajw89wb z+ZEeu40d35PUbe8ro3tNs+gVcvQrhSzjWPwU608NvbFKyY/F1NY1fEpFLGKIjPf9Q20 RFRUdn5blUr6QHjmw9BMziKvYzXOHamdbVjxrnDpIupSN2EL2iPJifzw+rAPwhRnYVN+ yC4g== X-Gm-Message-State: AOJu0Yxy83THtwuYbhAznaiZ1E00vXslokyUllpIK4n6n8dsnFY+j0C5 joaH4uoXcFQylexzQwOaVKIqfIsgo8l4nKTrs365LQa4iYPrJLpI X-Gm-Gg: ASbGncvO6QS6tdnlOG0E/ClDfhYOdhF20a4vxH+MfZmBDlSYeUR1TC91qFDLhD9CooO 4KmYlDR38x9yIoxGgW/tNdU2NK0R925ZYvkFnUTtLYHZog4zL8uVLKybVvTccBlXUXFATVyI7W5 Nuqcgla7+otNBGWcOroN7FM/Fl66uFDGPN+Zua2ykrCjSsofloxQnflu2xudM7ISly7I3vvWp9Z FhV4z+RbYcZktM/GldboJ/R9fkrG0T6V4IigRbY24q5MaVktvQm88bE7coXOE557J0LevBlUDLq c+FQY6sQVDkXEnPGymrRis1Fji0Ffdlz7jErVevZkRfVx7XpIg== X-Google-Smtp-Source: AGHT+IElpmGAxJwPh1EljvUTd5KmEh5FAnfZ45iUDl6diq0utS751FVHoJGtVtda+ch6eYrx/gVG0w== X-Received: by 2002:a17:902:da92:b0:216:794f:6d7d with SMTP id d9443c01a7336-22307e7274dmr151075845ad.48.1740624468337; Wed, 26 Feb 2025 18:47:48 -0800 (PST) Received: from localhost.localdomain ([61.173.25.243]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2235050fdafsm3681905ad.214.2025.02.26.18.47.44 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 26 Feb 2025 18:47:47 -0800 (PST) From: Yafang Shao To: jpoimboe@kernel.org, jikos@kernel.org, mbenes@suse.cz, pmladek@suse.com, joe.lawrence@redhat.com Cc: live-patching@vger.kernel.org, Yafang Shao Subject: [PATCH v3 0/2] livepatch: some improvements Date: Thu, 27 Feb 2025 10:47:31 +0800 Message-Id: <20250227024733.16989-1-laoar.shao@gmail.com> X-Mailer: git-send-email 2.37.1 (Apple Git-137.1) Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit #1: Clarify klp_add_nops() #2: Replace the tasklist_lock with RCU in the KLP transition v2->v3: - Skip the newly fokred tasks during klp_check_and_switch_task() (Josh) - Fix the local variable patch_state in the ftrace handler (Josh) v1->v2: https://lore.kernel.org/live-patching/20250223062046.2943-1-laoar.shao@gmail.com/ - Enhance the comment in #1 for better clarity and detail. (Petr) - Replace the tasklist_lock with RCU (Josh) - Remove the fix for RCU warnings as the root cause is currently unclear. Once the root cause is identified, I will submit the fix separately. v1: https://lore.kernel.org/live-patching/20250211062437.46811-1-laoar.shao@gmail.com/ Yafang Shao (2): livepatch: Add comment to clarify klp_add_nops() livepatch: Replace tasklist_lock with RCU include/linux/livepatch.h | 4 ++-- kernel/fork.c | 2 +- kernel/livepatch/core.c | 9 ++++++--- kernel/livepatch/patch.c | 8 +++++++- kernel/livepatch/transition.c | 35 ++++++++++++++--------------------- kernel/livepatch/transition.h | 1 + 6 files changed, 31 insertions(+), 28 deletions(-) -- 2.43.5