From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A29F931E84C for ; Tue, 3 Mar 2026 12:01:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772539283; cv=none; b=iazDL73SDPKJ6Lzy7ZDIr+6XY4YnDEm/lHLlkc1UBq2s6LKLhnwQLfiO8ffz+6YniipsLZ9nTELLOUpdHC2cm/z9k+WVDVbo3rQi8a5ViUE7uvNNYngWRtqJmG/uY9D5jAWFp/YMWRNu1ut1PMr3sxpr1Sa2K7aCAw7kUqiZ4es= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772539283; c=relaxed/simple; bh=+ArcU6CPPy9/poouKPdatiT46W0YJHtUjTmImvt1dsA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jUs7sEuumhOFyEykRvxO6kIGs6WcVN1VMXv6zlC6ZdYpOOUpobukmrfgFt2q1HzYnffL7GcKXkhiCMzxgljrBtHLFhKu5gnDjLJpw4DkGrt7sb10tjVqYSwffg2lul0L7t0hmvr/Ft0VL8dnE7d96JPM5F3WCBo6ljrgYl+5pYE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=B+GNqRA9; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="B+GNqRA9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02EEEC116C6; Tue, 3 Mar 2026 12:01:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772539283; bh=+ArcU6CPPy9/poouKPdatiT46W0YJHtUjTmImvt1dsA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B+GNqRA9floUGtKIkC8yN5V+zMWQta8Au2wf6JAPl+3sTlDyHy80XfIyCsaqfziNE z5kbauILwepzg1qTHtMgZSIwcTbVeiRZVUPWMpgbQRPoxXimVvB9bVbslL7rR16jzX SAaL3qyDJti6nTo4HkYaxPGoePij6njjm+hMdlVLkN/Ls2pkVaTJlWIEbcuTx7UTRp pE+lCzgQE1oa/CpDkuCwPIAslXWmSrEKEW1IdBRfg0joJoVdQYo16no3wONnGFzTCU YPqfiQUCZ0tid5Y4buQ6mZiwL5sAg8Tu1YOlyrX2KJ7namNIKu0Y1CFH2PixtWAgZe sVPslpFRj2wqA== Date: Tue, 3 Mar 2026 13:01:17 +0100 From: Ingo Molnar To: Peter Zijlstra Cc: x86@kernel.org, tglx@kernel.org, linux-kernel@vger.kernel.org, tim.c.chen@linux.intel.com, yu.c.chen@intel.com, kyle.meyer@hpe.com, vinicius.gomes@intel.com, brgerst@gmail.com, hpa@zytor.com, kprateek.nayak@amd.com, patryk.wlazlyn@linux.intel.com, rafael.j.wysocki@intel.com, russ.anderson@hpe.com, zhao1.liu@intel.com, tony.luck@intel.com Subject: Re: [PATCH v2 0/5] x86/topo: SNC Divination Message-ID: References: <20260303105539.428037056@infradead.org> 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 Content-Disposition: inline In-Reply-To: <20260303105539.428037056@infradead.org> * Peter Zijlstra wrote: > Hi! > > Extend Thomas' MADT time topology code to include SRAT based node counts to > provide a boot time based: topology_num_nodes_per_package(). > > This provides a best effort estimate for things like Intel CoD/SNC and AMD NPS > modes that are not otherwise enumerated. > > Use this measure to address various SNC snafus. > > v1: https://lkml.kernel.org/r/20260226104909.675623579@infradead.org > > --- > arch/x86/include/asm/numa.h | 6 ++ > arch/x86/include/asm/topology.h | 6 ++ > arch/x86/kernel/cpu/common.c | 3 + > arch/x86/kernel/cpu/resctrl/monitor.c | 36 +------ > arch/x86/kernel/cpu/topology.c | 13 ++- > arch/x86/kernel/smpboot.c | 198 ++++++++++++++++++++++++---------- > arch/x86/mm/numa.c | 8 ++ > arch/x86/mm/srat.c | 2 + > 8 files changed, 184 insertions(+), 88 deletions(-) Modulo some minor comments for patch #4, this series LGTM: Reviewed-by: Ingo Molnar Thanks, Ingo