From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86FD5C369CB for ; Thu, 24 Apr 2025 02:18:16 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3B05E6B0006; Wed, 23 Apr 2025 22:18:14 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3603A6B0007; Wed, 23 Apr 2025 22:18:14 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 24DED6B0008; Wed, 23 Apr 2025 22:18:14 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 06A056B0006 for ; Wed, 23 Apr 2025 22:18:13 -0400 (EDT) Received: from smtpin26.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 2A89B5EF36 for ; Thu, 24 Apr 2025 02:18:15 +0000 (UTC) X-FDA: 83367327750.26.68620C6 Received: from out-189.mta1.migadu.com (out-189.mta1.migadu.com [95.215.58.189]) by imf13.hostedemail.com (Postfix) with ESMTP id 763342000E for ; Thu, 24 Apr 2025 02:18:13 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=EJi9vs5V; spf=pass (imf13.hostedemail.com: domain of ye.liu@linux.dev designates 95.215.58.189 as permitted sender) smtp.mailfrom=ye.liu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1745461093; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=2T5lAnrEJNQwQyiPVjj4uMl+QlzCXBRaN6qYGLhWYKE=; b=2XJe6FmPYXMz8xUl4i7HHVppczSxLiRDZdsk3c/YRRbUrWNwi+Vm+pil1PzbO+ZnnkEJiX ew/ND/rxX0NB7btkBhiNqxcKRD9fSr6GO6/9PNdQeqemIuGFe+kQnYgSMGwF+6Qv5OnFDV /Gv6mVejGfuE9ZOCu9NsBpZw36QUMCQ= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=EJi9vs5V; spf=pass (imf13.hostedemail.com: domain of ye.liu@linux.dev designates 95.215.58.189 as permitted sender) smtp.mailfrom=ye.liu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1745461093; a=rsa-sha256; cv=none; b=B7Q18B3PiwcBw7SWtu5KnW5kCPWFLaW/3ousL2WVgbQl0vPDUEBIat8C0mu9yexJs2OsHF UvYhimizvDHShAbTeyhUyL66gSJvM21IZgd6asG/XAiEwDlhCNcXztbJUaBtNj4jnRXU67 CsYLXhSwv8OmEc5QN2sPjKfmJX0iqbQ= Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1745461091; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2T5lAnrEJNQwQyiPVjj4uMl+QlzCXBRaN6qYGLhWYKE=; b=EJi9vs5VuPrCf+IsuIhmfeiUsjfuW5oijaBPLAesl2OHnb4Ge6KVn4qvnoI0fU9psMDF8S HSqkipFcZiY3aBK8VUUnFztyL5Hg/bnx42cesDbGQAF2a64Qi9GskUXeln6DVMzpLjWSIt Pvrtpvx5HmlDBGDz5rSlWEyEe+LQZTo= Date: Thu, 24 Apr 2025 10:17:59 +0800 MIME-Version: 1.0 Subject: Re: [PATCH v3] tools/mm: Add script to display page state for a given PID and VADDR To: Florian Weimer Cc: akpm@linux-foundation.org, linux-debuggers@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-toolchains@vger.kernel.org, osandov@osandov.com, paulmck@kernel.org, sweettea-kernel@dorminy.me, liuye@kylinos.cn References: <20250423014850.344501-1-ye.liu@linux.dev> <87jz7bky7i.fsf@oldenburg.str.redhat.com> Content-Language: en-US X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Ye Liu In-Reply-To: <87jz7bky7i.fsf@oldenburg.str.redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 763342000E X-Stat-Signature: kfb5bn43w7k3op947iif9ts6oj55tm8h X-HE-Tag: 1745461093-668773 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 在 2025/4/23 17:45, Florian Weimer 写道: > * Ye Liu: > >> From: Ye Liu >> >> Introduces a new drgn script, `show_page_info.py`, which allows users >> to analyze the state of a page given a process ID (PID) and a virtual >> address (VADDR). This can help kernel developers or debuggers easily >> inspect page-related information in a live kernel or vmcore. >> >> The script extracts information such as the page flags, mapping, and >> other metadata relevant to diagnosing memory issues. >> >> Output example: >> sudo ./show_page_info.py 1 0x7f43df5acf00 >> PID: 1 Comm: systemd mm: 0xffff8881273bbc40 >> Raw: 0017ffffc000416c ffffea00043a4508 ffffea0004381e08 ffff88810f086a70 >> Raw: 0000000000000000 ffff888120c9b0c0 0000002500000007 ffff88812642c000 >> User Virtual Address: 0x7f43df5acf00 >> Page Address: 0xffffea00049a0b00 >> Page Flags: PG_referenced|PG_uptodate|PG_lru|PG_head|PG_active| >> PG_private|PG_reported >> Page Size: 16384 >> Page PFN: 0x12682c >> Page Physical: 0x12682c000 >> Page Virtual: 0xffff88812682c000 >> Page Refcount: 37 >> Page Mapcount: 7 >> Page Index: 0x0 >> Page Memcg Data: 0xffff88812642c000 >> Memcg Name: init.scope >> Memcg Path: /sys/fs/cgroup/memory/init.scope >> Page Mapping: 0xffff88810f086a70 >> Page Anon/File: File >> Page VMA: 0xffff88810e4af3b8 >> VMA Start: 0x7f43df5ac000 >> VMA End: 0x7f43df5b0000 >> This page is part of a compound page. >> This page is the head page of a compound page. >> Head Page: 0xffffea00049a0b00 >> Compound Order: 2 >> Number of Pages: 4 > Does this show the page access flags anywhere in the output? If not, > would it be possible to include this information? This script is currently a basic version, and we plan to gradually add more detailed information about pages, including the page access flags you mentioned, as well as PGD, PUD, PMD, PTE, file/anon rmap folios, and more. This will be refined over time.                              Thanks, Ye Liu > Thanks, > Florian >