From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EF3D4C77B7A for ; Tue, 30 May 2023 04:57:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229987AbjE3E5h (ORCPT ); Tue, 30 May 2023 00:57:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34026 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229614AbjE3E5g (ORCPT ); Tue, 30 May 2023 00:57:36 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98D75C9; Mon, 29 May 2023 21:57:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685422655; x=1716958655; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=BsdtVrFGCJbQ+fRw/SSLLWJvAmhHbsbfCItALlMk470=; b=GQCDc6WBp0Q9CKAhM98FUIYws+Luoff5PiAbjb5b29WY2h6JF0dal7iP bOrwsnRKfGz1BVrP2dZX8QV7/miZ/BTi+3B9KkYq+puWGuE+zsxKsnR39 QY70ExO9dS8t00Al5YtEDrDYS80n+EREIyQdfVZGDazHYxzm+YwVP6Wca A2mBWrh/7pV1g5WRcYI17Tfk3ml+Q9s7xGjR/uHd1Ce49fQ1/SrGtawpf NkEz0GPmEyjx+MrOgqeeG1U5PWuyIgy4Teo774VdtTzdRogtmfihcCSAY SNwtEt1K6hvZFqJZnT/RUtmpsx/5wa5Ec+RvE7yADvg9XTwWpGzEm90we g==; X-IronPort-AV: E=McAfee;i="6600,9927,10725"; a="339405183" X-IronPort-AV: E=Sophos;i="6.00,203,1681196400"; d="scan'208";a="339405183" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 May 2023 21:57:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10725"; a="830595390" X-IronPort-AV: E=Sophos;i="6.00,203,1681196400"; d="scan'208";a="830595390" Received: from tassilo.jf.intel.com (HELO tassilo) ([10.54.38.190]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 May 2023 21:57:35 -0700 Date: Mon, 29 May 2023 21:57:33 -0700 From: Andi Kleen To: Ian Rogers Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Adrian Hunter , "Masami Hiramatsu (Google)" , "Steven Rostedt (Google)" , Ross Zwisler , Leo Yan , Tiezhu Yang , Yang Jihong , Kan Liang , Ravi Bangoria , Sean Christopherson , K Prateek Nayak , Paolo Bonzini , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: Re: [PATCH v2 00/16] Address some perf memory/data size issues Message-ID: References: <20230526183401.2326121-1-irogers@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230526183401.2326121-1-irogers@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org FWIW I think the whole patchkit could be replaced with a one liner that disables THP for the BSS segment. I suspect that would be roughly equivalent for memory consumption because 4K pages that are never touched would never be allocated. -Andi