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 0BC4529B776; Wed, 22 Oct 2025 19:52:32 +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=1761162754; cv=none; b=jyV3GbDPQiT5GTU5f3lBfTM/ZTbx8JdJxUxnZETGDawPzDGnCiUESElihs7Q6mAZ2pFSNtQhcnhthH4+U51rPEYDBJ/Cjqh099W7P+dugpx7OvytGBgwzmhCrk9vcAucI6+zAOt4gKFmfKyBAxH4w6Hl3hZCkGJVtBSOYZ886hE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761162754; c=relaxed/simple; bh=Haa0rbzk7uFEUkoM8PNccPAjfwpK0TMmgUFI/7nPrus=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References: MIME-Version:Content-Type; b=MH/TIzGDiRhKJL3lKJRLfEwC+r/+YAUXCFkVc7DESm5klpKnu0gXQY6JFZH15kw/J3ehgak2dh+AO/N/I6DQTN56nTNFyxBUlMybu0DdLKrCqLA4kLKTKmgTxm/+ALE7HKisLqko0JrAT7OFHnRkVooIGmi7PRurAMmI9cgg1V4= 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=tAkUlDbN; 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="tAkUlDbN" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gentwo.org; s=default; t=1761162746; bh=Haa0rbzk7uFEUkoM8PNccPAjfwpK0TMmgUFI/7nPrus=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=tAkUlDbNTOnRRGLA2FGyHap564fehNknda1C5LM24NN5OumaiRHnf9szaKFZIw8bE XxUA77mQ5kW1oW2tnEM88YAmQmij/B9xz7k4NN9hzCd4RJHeMKSgP8n8/MPAVVGyUG jU+ausY+n4D/78g8H3qDTKvn4VmyxydnE1ge8LUs= Received: by gentwo.org (Postfix, from userid 1003) id 3EDB6401E1; Wed, 22 Oct 2025 12:52:26 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by gentwo.org (Postfix) with ESMTP id 3CA074010E; Wed, 22 Oct 2025 12:52:26 -0700 (PDT) Date: Wed, 22 Oct 2025 12:52:26 -0700 (PDT) From: "Christoph Lameter (Ampere)" To: Nico Pache cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, david@redhat.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, ryan.roberts@arm.com, dev.jain@arm.com, corbet@lwn.net, rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, akpm@linux-foundation.org, baohua@kernel.org, willy@infradead.org, peterx@redhat.com, wangkefeng.wang@huawei.com, usamaarif642@gmail.com, sunnanyong@huawei.com, vishal.moola@gmail.com, thomas.hellstrom@linux.intel.com, yang@os.amperecomputing.com, kas@kernel.org, aarcange@redhat.com, raquini@redhat.com, anshuman.khandual@arm.com, catalin.marinas@arm.com, tiwai@suse.de, will@kernel.org, dave.hansen@linux.intel.com, jack@suse.cz, jglisse@google.com, surenb@google.com, zokeefe@google.com, hannes@cmpxchg.org, rientjes@google.com, mhocko@suse.com, rdunlap@infradead.org, hughd@google.com, richard.weiyang@gmail.com, lance.yang@linux.dev, vbabka@suse.cz, rppt@kernel.org, jannh@google.com, pfalcato@suse.de, Bagas Sanjaya Subject: Re: [PATCH v12 mm-new 15/15] Documentation: mm: update the admin guide for mTHP collapse In-Reply-To: <20251022183717.70829-16-npache@redhat.com> Message-ID: References: <20251022183717.70829-1-npache@redhat.com> <20251022183717.70829-16-npache@redhat.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Wed, 22 Oct 2025, Nico Pache wrote: > Currently, madvise_collapse only supports collapsing to PMD-sized THPs + > and does not attempt mTHP collapses. + madvise collapse is frequently used as far as I can tell from the THP loads being tested. Could we support madvise collapse for mTHP?