From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f179.google.com (mail-pd0-f179.google.com [209.85.192.179]) by kanga.kvack.org (Postfix) with ESMTP id B1B0C6B0035 for ; Thu, 21 Aug 2014 19:35:57 -0400 (EDT) Received: by mail-pd0-f179.google.com with SMTP id v10so14873160pde.38 for ; Thu, 21 Aug 2014 16:35:57 -0700 (PDT) Received: from mga09.intel.com (mga09.intel.com. [134.134.136.24]) by mx.google.com with ESMTP id t11si38415893pdl.0.2014.08.21.16.35.56 for ; Thu, 21 Aug 2014 16:35:56 -0700 (PDT) Date: Fri, 22 Aug 2014 07:37:29 +0800 From: Wanpeng Li 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> Sender: owner-linux-mm@kvack.org List-ID: 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 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 -- 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