From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f53.google.com (mail-pa0-f53.google.com [209.85.220.53]) by dpdk.org (Postfix) with ESMTP id B704F8E7D for ; Tue, 24 Nov 2015 23:43:54 +0100 (CET) Received: by pabfh17 with SMTP id fh17so36652613pab.0 for ; Tue, 24 Nov 2015 14:43:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=tm2RMMlT8SaAVrN4jZyjBY1sfyqq4tyOagqtCHaPhzE=; b=1PC3P3Dqejw8uWYtNaYSoyE/4RbIWqJ6oJd/13ZAr4qo9STknmbVNNWLM2fP7movJo wJ97hdaiaqOGzOrVyDLKrZ7SMgBgXERX61CWTLUBjSlgva/13BP51ifmw4r5OysVeHhx pUtrpvwQSsrTNTw+QkILVnKjVliXZQLC30iAJ9NBlPceoatZVcnE9RA1LDRj/1EwFifn AxHovgKRu9Sn7o8qdbd9jVTK3B3qBRCVR+P98+mukoVBHVfNzede2zrBCy71GhZBTNmU JbUmZl2TgChjfbE5BRa6iFzl6kjy/Hu3T5L5skTCvGlNavzkRVfYdaJ16D4R0fIRws2a 2JBw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-type:content-transfer-encoding; bh=tm2RMMlT8SaAVrN4jZyjBY1sfyqq4tyOagqtCHaPhzE=; b=HPMcooW6PLgxSKMfVvZ6OLSPbhWbf/oSmp5L1CaAk48pmPt0KCU2EuM8BEjVj0d0QO Guv2Ak2IHwCZ+B/him/l2sC6wh8wGwLqEpriKskacz8nEENuiTbEifNd5wIk2eQoFYVA cWM4seK6aVihmXyuLs7Y8HHRdi3ixpzKIQG6nyBxBmHTaLGkYZOl6tYy6pKSCW06QvRK YlgOgxdVpeg2LeO0HpxY1MyO2mYaCKj7HJLFUnzq92nuAwy5Tt06rhhKFsYdVSyAjW3+ Nzd2LNrAPgYdkCjfopn5bH9vBBdOYh5f5DQTvvPL8neFmkR4EZLwKx/M9CgQ2soTUgoY R6mw== X-Gm-Message-State: ALoCoQmeHFrc0SYV96K//BKRbFPrTGZhh1FKQvJknuecUCfNPQbjpFzW1lAa2aT5zxlYyNKGiNHc X-Received: by 10.98.16.216 with SMTP id 85mr26789174pfq.64.1448405033992; Tue, 24 Nov 2015 14:43:53 -0800 (PST) Received: from xeon-e3 (static-50-53-82-155.bvtn.or.frontiernet.net. [50.53.82.155]) by smtp.gmail.com with ESMTPSA id m70sm16424418pfi.65.2015.11.24.14.43.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 24 Nov 2015 14:43:53 -0800 (PST) Date: Tue, 24 Nov 2015 14:44:03 -0800 From: Stephen Hemminger To: Thomas Monjalon Message-ID: <20151124144403.79811c0a@xeon-e3> In-Reply-To: <1640963.TLMeDD9tfp@xps13> References: <1448219615-63746-1-git-send-email-zhihong.wang@intel.com> <1448219615-63746-3-git-send-email-zhihong.wang@intel.com> <20151122182800.397e0701@xeon-e3> <1640963.TLMeDD9tfp@xps13> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: dev@dpdk.org Subject: Re: [dpdk-dev] [PATCH 2/2] lib/librte_eal: Remove unnecessary hugepage zero-filling X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Nov 2015 22:43:55 -0000 On Tue, 24 Nov 2015 22:13:28 +0100 Thomas Monjalon wrote: > 2015-11-22 18:28, Stephen Hemminger: > > On Sun, 22 Nov 2015 14:13:35 -0500 > > Zhihong Wang wrote: > > > > > The kernel fills new allocated (huge) pages with zeros. > > > DPDK just has to populate page tables to trigger the allocation. > > > > > > Signed-off-by: Zhihong Wang > > > > Nice, especially on slow machines or with large memory. > > > > Acked-by: Stephen Hemminger > > Yes very nice. > I think it's too late to integrate this change which can have some > unpredictable side effects. > Do you agree to wait for 2.3? What side effects? Either it is zero or it is not. Only some broken architecture would have an issue.