From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta0.migadu.com (out-233.mta0.migadu.com [91.218.175.233]) (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 DC99247F3AE for ; Wed, 14 Oct 2026 07:04:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.233 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791961485; cv=none; b=cSkOQcG812/riwa9R00S2ro1Rq8b5NI/P5oHTkpMTNsyC9WoAI8uZT7XKCe+FQ22rpwpFjnX2Ff+ahIJx6CqpsDI2u/Lm04vCq4yMd/BuhyhvW9NHfErUJ4Rb3116GXnE9cchaOzoqckV/Alpz9IJFxe3iwiJ3watx5m/pi5LfY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791961485; c=relaxed/simple; bh=DYV7gVOeR2CBG2yKmyTc+5ln+eeoHJB5okAWZ+ZFVBY=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=jHGalIMe0R7FlYmH+z7HoW+PO/50rrtxHYizzxyRyUkBi+pc6vQetK9rvRwu1+Bj+aMEwFLkJb8DZY0VXafShkEDN3jjIPldznR7RbrZCtJXXQIdr7rFycHKe9X5EQVTEgeiyKvpVrLK+dsED6n1wpQq32Ns8+MXkkCv/VGMrwM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=nfKDW2ep; arc=none smtp.client-ip=91.218.175.233 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="nfKDW2ep" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=DYV7gVOeR2CBG2yKmyTc+5ln+eeoHJB5okAWZ+ZFVBY=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1791961479; v=1; x=1792566279; b=nfKDW2epzgA463YsdR1w5II6lfTCPu93W2w8x9w4mUo3uB8ZNO3SU/pTIWRjCcrsQTYDVCjG rNeguEovPcnaaxT2nNlZDkXysxlzUG0JzQ72fTo+z+rNi8PpCzG0y/dYhUTaA5TtbW2RmE5i7Hi hQk2sl66UUp506kxhrQ4Cl5s= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id ed275eddc9041163; Wed, 14 Oct 2026 07:04:39 +0000 X-Mizu-Trace-ID: ed275eddc9041163 X-Migadu-Flow: FLOW_OUT From: Ye Liu Subject: [PATCH 0/3] tools/mm: show_page_info.py enhancements and fixes Date: Wed, 14 Oct 2026 15:04:27 +0800 Message-Id: <20261014-show_page_info-v1-0-7a68aee0114a@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-B4-Tracking: v=1; b=H4sIAHspz2oC/yXMSQqEMBBA0atIrQ0khQN6FRFRu6LVi0RSTiDe3 XS7fIv/LxAKTAJ1ckGgnYW9izBpAuPcu4kUf6IBNRZGm0zJ7I9u6Sfq2FmvDNqhRE15XiHEaAl k+fwPm/a1bMOXxvV3gft+AEKOuLNyAAAA X-Change-ID: 20261014-show_page_info-12fb720e5592 To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Ye Liu X-Mailer: b4 0.17-dev-39d60 This series improves the show_page_info.py drgn script with bug fixes and new features: Patch 1 fixes memory cgroup information retrieval by updating the obj_cgroup type casting and handling slabobj_ext field name changes for compatibility with newer kernel versions. Patch 2 removes the incorrect Page Index field display, as pages don't have indexes - only folios do. Patch 3 adds VMA flags decoding and VMA name display to provide more detailed information about the virtual memory area containing the page. These changes ensure the script works correctly with current kernel memory management structures and provides more comprehensive page state information. Signed-off-by: Ye Liu --- Actual results： drgn -s /root/linux-next/vmlinux show_page_info.py 1 7f17c9ab5000 PID: 1 Comm: systemd mm: 0xffff8d796ab73800 RAW: 0017ffffc0020028 fffff2af04d3aa88 fffff2af04d3ab08 ffff8d794703b901 RAW: 00000007f17c9ab5 0000000000000000 0000000100000000 ffff8d79438fd700 Page Address: 0xfffff2af04d3aac0 Page Flags: PG_uptodate|PG_lru|PG_swapbacked|PG_movable_ops|PG_reported Page Size: 4096 Page PFN: 0x134eab Page Physical: 0x134eab000 Page Virtual: 0xffff8d7974eab000 Page Refcount: 1 Page Mapcount: 0 Page Memcg Data: 0xffff8d79438fd700 Memcg Name: init.scope Memcg Path: /sys/fs/cgroup/memory/init.scope Page Mapping: 0xffff8d794703b901 Page Anon/File: Anon Page VMA: 0xffff8d796b0c0cc0 VMA Start: 0x7f17c9ab5000 VMA End: 0x7f17c9ab6000 VMA Flags: 0x8100073 (READ|WRITE|MAYREAD|MAYWRITE|MAYEXEC|ACCOUNT|SOFTDIRTY) VMA Name: /usr/lib64/libmount.so.1.1.0 This page is not part of a compound page. --- Ye Liu (3): tools/mm: fix memcg info retrieval in show_page_info.py tools/mm: remove Page Index field from show_page_info tools/mm: add VMA flags decoding and name display to show_page_info.py tools/mm/show_page_info.py | 68 ++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 60 insertions(+), 8 deletions(-) --- base-commit: 1fffefb00cc0b0da1f2ae24e3d33364530ea6515 base-tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master change-id: 20261014-show_page_info-12fb720e5592 Best regards, -- Ye Liu