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X-IronPort-AV: E=McAfee;i="6500,9779,10615"; a="331420887" X-IronPort-AV: E=Sophos;i="5.97,283,1669104000"; d="scan'208";a="331420887" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Feb 2023 06:28:10 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10615"; a="791610358" X-IronPort-AV: E=Sophos;i="5.97,283,1669104000"; d="scan'208";a="791610358" Received: from davidsan-mobl3.amr.corp.intel.com (HELO [10.209.22.211]) ([10.209.22.211]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Feb 2023 06:28:09 -0800 Message-ID: <9848226e-2574-b8e0-4fb4-316957f57fb5@intel.com> Date: Thu, 9 Feb 2023 06:28:08 -0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.6.1 Subject: Re: [RFC PATCH 0/5] Memory access profiler(IBS) driven NUMA balancing Content-Language: en-US To: Bharata B Rao , Peter Zijlstra Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, mgorman@suse.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, akpm@linux-foundation.org, luto@kernel.org, tglx@linutronix.de, yue.li@memverge.com, Ravikumar.Bangoria@amd.com, ying.huang@intel.com References: <20230208073533.715-1-bharata@amd.com> <4808d3fa-bb68-d4c8-681f-0b2770d78041@intel.com> <369bef08-92cc-9b55-823f-1fe780532967@amd.com> From: Dave Hansen In-Reply-To: <369bef08-92cc-9b55-823f-1fe780532967@amd.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: C5633400DC X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: 5y138razjqbxpodjt5cjjf5wt8pr6g16 X-HE-Tag: 1675954914-879376 X-HE-Meta: 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 f5Fx2Jq1 PRZC/xkAxL44juhnHgG+6ZpprRQSEKeeLZKQqDN0mOhx45UZSszlcY9xcOnBQtLAqob7xwXaqyrxqqPjLWKyC6xrE92nge39oRy2/Iuuu796oBM3/H24XtmYpPDDvkzVHSqv5RyvTtTRXGQvXYyPU3Xh/vwmA/7/9yunL 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: On 2/8/23 22:04, Bharata B Rao wrote: >> First, IIRC, Intel PEBS at the time only gave guest virtual addresses in >> the PEBS records. They had to be translated back to host addresses to >> be usable. That was extra expensive. > Just to be clear, I am using IBS in host only and it can give both virtual > and physical address. Could you talk a little bit about how IBS might get used for NUMA balancing guest memory?