Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1945988Ab2KNXPW (ORCPT ); Wed, 14 Nov 2012 18:15:22 -0500 Received: from lxorguk.ukuu.org.uk ([81.2.110.251]:53177 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1945923Ab2KNXPV (ORCPT ); Wed, 14 Nov 2012 18:15:21 -0500 Date: Wed, 14 Nov 2012 23:20:13 +0000 From: Alan Cox To: Andrew Morton Cc: "Kirill A. Shutemov" , Andrea Arcangeli , linux-mm@kvack.org, Andi Kleen , "H. Peter Anvin" , linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: Re: [PATCH v5 00/11] Introduce huge zero page Message-ID: <20121114232013.7ee42414@pyramind.ukuu.org.uk> In-Reply-To: <20121114133342.cc7bcd6e.akpm@linux-foundation.org> References: <1352300463-12627-1-git-send-email-kirill.shutemov@linux.intel.com> <20121114133342.cc7bcd6e.akpm@linux-foundation.org> X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.8; x86_64-redhat-linux-gnu) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 535 Lines: 13 > I'm still a bit concerned over the possibility that some workloads will > cause a high-frequency free/alloc/memset cycle on that huge zero page. > We'll see how it goes... That is easy enough to fix - we can delay the freeing by a random time or until memory pressure is applied. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/