From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f73.google.com (mail-io1-f73.google.com [209.85.166.73]) (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 255691A316D for ; Thu, 20 Mar 2025 06:39:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742452788; cv=none; b=LYK5lYz4n84Ew//drZ445LRR7qJE1kkEToB5ZMfTERYHgDJKC1w8DKZv4Z1CLa9qALHSL4ySqVWa6vMkXoAjayp0pFURn1QY0cEcva/3wjF//t1qiIf5tWMh8e5sLIvnR0ansft+DUK7eSTjv4nlvB6Y+WCKXXBb94uf1kcruAI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742452788; c=relaxed/simple; bh=lvHr0xBduL12ILHUgkyvTDkRAIc5TEt9QlLTMcKApCg=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=GR8+PvpOGqMet4GGH8WIdHcu2ciUsdyUPh3JZYSBKLD9arxx/iGjFSROYCowTsqrFB+8l2F8PmC7prO8zmkYnfVvmHhgvAJg+50HnUwQWWCqNflyXzNmmveA1kowd6kEvOaiXuLjY0r5oGvtfy/rvrMdXg26VqfF+7mbhrcjTFA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--avagin.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=3UHfLraX; arc=none smtp.client-ip=209.85.166.73 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--avagin.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="3UHfLraX" Received: by mail-io1-f73.google.com with SMTP id ca18e2360f4ac-85b402f6a1bso140300839f.2 for ; Wed, 19 Mar 2025 23:39:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1742452785; x=1743057585; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=3ZuKkdmfZDR1C+3icFeF962+7yJcOI589wOKKi/iF/w=; b=3UHfLraXEmNQRRJt+dSZjFQV+eZuZ3VyBV7NOM6LCKhmbBX9kfV592MnsT4SYRCx1/ WTfPD4xzrTqOpQ0tLjKJ0wmwEFuWuE1hKvGwgdqr97NhxslNcuOMG0z2efLc2bthmkBN l03p2o3fb6k9evSwAGwo37tVLQIJyGH1aaoALs2iIwv6poYJpRo6kCfkaaks+5tWdM+Y 4PlCYDJxTmxHTNamrDg9LEaBJBxcetn1mHT5P+aAs91iNoYjT5tew5AkZw11Yy9oBQ62 j1RFcRPRtuYymtj+pGHozitDCaKWy14ObPGugGx88l6B2Ag+BQmafET3yKLOSYa9kbeG 57cQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1742452785; x=1743057585; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=3ZuKkdmfZDR1C+3icFeF962+7yJcOI589wOKKi/iF/w=; b=AmPv4iAO7r0/jSFlT1jLD1jfhi1Bjq0L+kscJVZVusgLr1PyY+Mo8mwEFbsLzRlm9v Pn2Zn3KvbWYiYmBMI3hN2+UzFsZpRaLLVNqAQYwex/wFLBFxS+s+nlzeoeTwnurOjvJw PAiIWYY+zE11FNaKdyws581kZ3sXEwcnpKplokNEAqowpxnCv5Cd0IQzaXl4rbosU7Jz VUO4A4p3443eU6b2QZppOJEds/ot4RM+5H48IbgyfwuoER+ZihK17DONz4RnCzuskmN0 I8Qzoc/C6Bt2MTgRpqU+JeKwMqC+uP39baDn6masoF3gFsKiWgUTVs2ASBsuDImwj50L u/8w== X-Gm-Message-State: AOJu0YwWzjTRwNfIN5JW4FX3ZBWrLZR/7c8xPcyiVHmoCEvx6IcGJkub DCnRaB5FKRCM/TAwR+KIvewWZzDbwXIqeLumegi5tayAzcX4Mqg0ZTC8pWMlHFVxgenRp9zKJwJ Wrw== X-Google-Smtp-Source: AGHT+IHWqodOqFQvUCGpVWIEl082LJUg7feyjPoyDn+FcJqgqu/vvy3kAQRePZCxSlpgiFrJVjN7q7Ot0j4= X-Received: from ilbck17.prod.google.com ([2002:a05:6e02:3711:b0:3d5:8368:8284]) (user=avagin job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6e02:1c0f:b0:3d0:237e:c29c with SMTP id e9e14a558f8ab-3d586b45206mr71026475ab.12.1742452785209; Wed, 19 Mar 2025 23:39:45 -0700 (PDT) Date: Thu, 20 Mar 2025 06:39:01 +0000 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 2.49.0.rc1.451.g8f38331e32-goog Message-ID: <20250320063903.2685882-1-avagin@google.com> Subject: [PATCH 0/2] fs/proc: extend the PAGEMAP_SCAN ioctl to report From: Andrei Vagin To: Lorenzo Stoakes , Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, David Hildenbrand , Shuah Khan , Jonathan Corbet , Andrei Vagin Content-Type: text/plain; charset="UTF-8" Introduce the PAGE_IS_GUARD flag in the PAGEMAP_SCAN ioctl to expose information about guard regions. This allows userspace tools, such as CRIU, to detect and handle guard regions. This series should be applied on top of "[PATCH 0/2] fs/proc/task_mmu: add guard region bit to pagemap": https://lore.kernel.org/all/2025031926-engraved-footer-3e9b@gregkh/T/ The series includes updates to the documentation and selftests to reflect the new functionality. Andrei Vagin (2): fs/proc: extend the PAGEMAP_SCAN ioctl to report guard regions selftests/mm: add PAGEMAP_SCAN guard region test Documentation/admin-guide/mm/pagemap.rst | 1 + fs/proc/task_mmu.c | 8 +++- include/uapi/linux/fs.h | 1 + tools/testing/selftests/mm/guard-regions.c | 53 ++++++++++++++++++++++ 4 files changed, 61 insertions(+), 2 deletions(-) -- 2.49.0.rc1.451.g8f38331e32-goog