From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gentwo.org (gentwo.org [62.72.0.81]) (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 A61D42163A6 for ; Fri, 20 Dec 2024 18:54:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.72.0.81 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734720851; cv=none; b=qERaItAJFRTLN0xKZ+6PC9pufd6NaC1tYrbPv+PGXiBKFQmxNgk/DyUq09uATn6sJgnkiYo1EH233k555+s26joc5YMpBvXb1LkVkltywzE0lrt+R0Jg/L45GmkuYn2twh/PH2HTGFBGQpqOtMDRp4+4CtD+Ma+aYcTSxfGS2mk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734720851; c=relaxed/simple; bh=W0GZ94nPgfukYI2/C8xFOkC26W5C0h98Dz6rvxSXH1c=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References: MIME-Version:Content-Type; b=LUez+OQs5KWzR9XqUwm1aYIW9GsFdr2sYYq/xrk3zF0Fqh5Gjj4LyNpwFIkRYAHSvSUFqQLeFmidbWVjIzdo1AqV4CfLtaOoPlb+oA4wek0S9ctIkdr5/RiRpqQ7SphtVi8ioIZPUx+cWQnsuQcDLj3hSCJI7xA8QMH2umW3Z9o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=gentwo.org; spf=pass smtp.mailfrom=gentwo.org; dkim=pass (1024-bit key) header.d=gentwo.org header.i=@gentwo.org header.b=CbZtdPTp; arc=none smtp.client-ip=62.72.0.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=gentwo.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gentwo.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=gentwo.org header.i=@gentwo.org header.b="CbZtdPTp" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gentwo.org; s=default; t=1734716505; bh=W0GZ94nPgfukYI2/C8xFOkC26W5C0h98Dz6rvxSXH1c=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=CbZtdPTpizViGBd7crJWpECXUo22oqNgHZvwcKYm1h9xkfEQHKXqG8UnPKY+vHaQz C1R0xapMakqAzJBd3DopwLtRtLarjY1udmYd18pNEIQr/dv7tSnrDqI/r6Y+vB/Zl9 eHiUYcJfxFyL4bnoER+HMXCh81+vrCgui/IFrBxQ= Received: by gentwo.org (Postfix, from userid 1003) id 42CA0401EE; Fri, 20 Dec 2024 09:41:45 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by gentwo.org (Postfix) with ESMTP id 40EAF401E6; Fri, 20 Dec 2024 09:41:45 -0800 (PST) Date: Fri, 20 Dec 2024 09:41:45 -0800 (PST) From: "Christoph Lameter (Ampere)" To: Ryan Roberts cc: Matthew Wilcox , Dev Jain , akpm@linux-foundation.org, david@redhat.com, kirill.shutemov@linux.intel.com, anshuman.khandual@arm.com, catalin.marinas@arm.com, vbabka@suse.cz, mhocko@suse.com, apopple@nvidia.com, dave.hansen@linux.intel.com, will@kernel.org, baohua@kernel.org, jack@suse.cz, srivatsa@csail.mit.edu, haowenchao22@gmail.com, hughd@google.com, aneesh.kumar@kernel.org, yang@os.amperecomputing.com, peterx@redhat.com, ioworker0@gmail.com, wangkefeng.wang@huawei.com, ziy@nvidia.com, jglisse@google.com, surenb@google.com, vishal.moola@gmail.com, zokeefe@google.com, zhengqi.arch@bytedance.com, jhubbard@nvidia.com, 21cnbao@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 02/12] khugepaged: Generalize alloc_charge_folio() In-Reply-To: Message-ID: <5e716fd3-2393-8d41-bb68-9f589e4db290@gentwo.org> References: <20241216165105.56185-1-dev.jain@arm.com> <20241216165105.56185-3-dev.jain@arm.com> 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=US-ASCII On Tue, 17 Dec 2024, Ryan Roberts wrote: > We previously decided that all existing THP stats would continue to only count > PMD-sized THP for fear of breaking userspace in subtle ways, and instead would > introduce new mTHP stats that can count for each order. We already have > MTHP_STAT_ANON_FAULT_ALLOC and MTHP_STAT_ANON_FAULT_FALLBACK (amongst others) so > these new stats fit the pattern well, IMHO. Could we move all the stats somewhere into sysfs where we can get them by page order? /proc/vmstat keeps getting new counters.