Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755521Ab2KNXvW (ORCPT ); Wed, 14 Nov 2012 18:51:22 -0500 Received: from mga03.intel.com ([143.182.124.21]:50684 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755397Ab2KNXvV (ORCPT ); Wed, 14 Nov 2012 18:51:21 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.83,252,1352102400"; d="scan'208";a="217956608" Message-ID: <50A42E77.8030200@linux.intel.com> Date: Wed, 14 Nov 2012 15:51:19 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121029 Thunderbird/16.0.2 MIME-Version: 1.0 To: Andrew Morton CC: Alan Cox , "Kirill A. Shutemov" , Andrea Arcangeli , linux-mm@kvack.org, Andi Kleen , linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: Re: [PATCH v5 00/11] Introduce huge zero page References: <1352300463-12627-1-git-send-email-kirill.shutemov@linux.intel.com> <20121114133342.cc7bcd6e.akpm@linux-foundation.org> <20121114232013.7ee42414@pyramind.ukuu.org.uk> <20121114153243.0f6d6bec.akpm@linux-foundation.org> In-Reply-To: <20121114153243.0f6d6bec.akpm@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 662 Lines: 19 On 11/14/2012 03:32 PM, Andrew Morton wrote: > > The current code does the latter, by freeing the page via a > "slab"-shrinker callback. > > But I do suspect that with the right combination of use/unuse and > memory pressure, we could still get into the high-frequency scenario. > There probably isn't any mechanism that doesn't end up with poor results in some corner case... just like the vhzp variant. -hpa -- 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/