From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755541AbaHUXgC (ORCPT ); Thu, 21 Aug 2014 19:36:02 -0400 Received: from mga02.intel.com ([134.134.136.20]:14944 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752449AbaHUXgB (ORCPT ); Thu, 21 Aug 2014 19:36:01 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,376,1406617200"; d="scan'208";a="561883074" Date: Fri, 22 Aug 2014 07:37:29 +0800 From: Wanpeng Li To: Andi Kleen Cc: Andrew Morton , Andi Kleen , KAMEZAWA Hiroyuki , "Aneesh Kumar K.V" , Michal Hocko , Mel Gorman , Rik van Riel , Hillf Danton , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/6] mm/hugetlb: gigantic hugetlb page pools shrink supporting Message-ID: <20140821233729.GB2420@kernel> Reply-To: Wanpeng Li References: <1365066554-29195-1-git-send-email-liwanp@linux.vnet.ibm.com> <20130411232907.GC29398@hacker.(null)> <20130412152237.GM16732@two.firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130412152237.GM16732@two.firstfloor.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Andi, On Fri, Apr 12, 2013 at 05:22:37PM +0200, Andi Kleen wrote: >On Fri, Apr 12, 2013 at 07:29:07AM +0800, Wanpeng Li wrote: >> Ping Andi, >> On Thu, Apr 04, 2013 at 05:09:08PM +0800, Wanpeng Li wrote: >> >order >= MAX_ORDER pages are only allocated at boot stage using the >> >bootmem allocator with the "hugepages=xxx" option. These pages are never >> >free after boot by default since it would be a one-way street(>= MAX_ORDER >> >pages cannot be allocated later), but if administrator confirm not to >> >use these gigantic pages any more, these pinned pages will waste memory >> >since other users can't grab free pages from gigantic hugetlb pool even >> >if OOM, it's not flexible. The patchset add hugetlb gigantic page pools >> >shrink supporting. Administrator can enable knob exported in sysctl to >> >permit to shrink gigantic hugetlb pool. > > >I originally didn't allow this because it's only one way and it seemed >dubious. I've been recently working on a new patchkit to allocate >GB pages from CMA. With that freeing actually makes sense, as >the pages can be reallocated. > More than one year past, If your allocate GB pages from CMA merged? Regards, Wanpeng Li >-Andi > >-- >To unsubscribe, send a message with 'unsubscribe linux-mm' in >the body to majordomo@kvack.org. For more info on Linux MM, >see: http://www.linux-mm.org/ . >Don't email: email@kvack.org