From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-185.mta0.migadu.com (out-185.mta0.migadu.com [91.218.175.185]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A25B32EBBB9 for ; Mon, 3 Aug 2026 06:21:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.185 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785738116; cv=none; b=KitTUFE2vgkJvtbgoLcE7Tnqa2kugTXH6WzQMUEZr2Oag5UHnPmnZwbYLA3Bqdl5iFfxVkZCOY0A4xjDnxQWJI3Fca2YbmplrG2zOPO56dL+Hj3zj0/TffWW9jtswOQtdebRP52x1uVYt6VawTeyiVhabUlEuvzMA14RFavG01U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785738116; c=relaxed/simple; bh=3T+/DKd+zxVubxYRaS8FcMZwD57sBWF4MdrCwuuAiqw=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=PCUIBzBpIOGDFPFgd0xpdyMLdDcRQIsso5F32dh0PBn/udJxlVEiOTHGhUVaBfRKc8+tjku57Ql1y2xtX6Gz9P6a+omWwhlpwJslEqccII3rSw1/CUKrjo+dh3KToXMTOG9W8CZloxbkpy0IV4340xkMC3ADG/xFarqZYPnMgaI= 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=eDIQEkdK; arc=none smtp.client-ip=91.218.175.185 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="eDIQEkdK" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1785738112; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=WHgL7q6z3CErxPHvG+ihsc36p4rExS74ePzEBVIZczI=; b=eDIQEkdKSqUxjkFWRpEuniHO0LGOE4/4kwl/QPsPV1NGJ1SFLv1Mh68jSLjF8zpw87rZsO TKuvN74DSwzpXsYdXhDjSshfiXAS4f8TvZ4VW8bULIjJMMpvaOkGL6FgXf+isjMnr6TK4h HB+0yntqP7v481n2+yWdFQC6Ot1bxno= From: Ye Liu To: Andrew Morton Cc: Ye Liu , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonathan Corbet , Shuah Khan , linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/3] tools/mm/page_owner_sort: fix --sort, add module filter, improve usage Date: Mon, 3 Aug 2026 14:20:53 +0800 Message-Id: <20260803062056.1518070-1-ye.liu@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT From: Ye Liu This series improves the page_owner_sort tool with a bug fix, a new module-name feature, and better usage text. Patch 1 fixes a long-standing bug where --sort was silently ignored when used without a short option (-a, -m, -p, etc.). The COMP_NO_FLAG case fell through to COMP_NUM and overwrote the sort conditions configured by parse_sort_args(). Patch 2 adds kernel module name support for sort, cull, and filter operations. Page owner stack traces already contain module names in the "function+0xNN/0xNN [module]" format produced by %pS, but page_owner_sort had no way to use them. Records without module frames are assigned "vmlinux". # Aggregate page usage per module ./page_owner_sort input.txt output.txt --cull=mod # Filter to records from xfs module only ./page_owner_sort input.txt output.txt --module xfs # Sort by module name, then by pid descending ./page_owner_sort input.txt output.txt --sort=mod,-pid Patch 3 lists all available sort keys with abbreviations and examples directly in the --sort help section so users no longer need to read the source to discover valid keys. Ye Liu (3): tools/mm/page_owner_sort: fix --sort option being silently ignored tools/mm/page_owner_sort: add module name sort/cull/filter support tools/mm/page_owner_sort: show available sort keys in usage text Documentation/mm/page_owner.rst | 8 +- tools/mm/page_owner_sort.c | 135 +++++++++++++++++++++++++++----- 2 files changed, 123 insertions(+), 20 deletions(-) --- v2: - Patch 2: use regexec() directly in get_module() instead of search_pattern() to avoid excessive debug spam for the common vmlinux case when debug_on is true - Patch 2: anchor module regex to stack trace format "+0xNN/0xNN [module]" to prevent false matches on kernel thread comm names like [khugepaged] - Patch 2: add '-' to regex character class to support modules with hyphens (e.g. aa-bb-cc) - Link:https://lore.kernel.org/all/20260722023726.600200-1-ye.liu@linux.dev/ -- 2.25.1