From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Rapoprt Subject: Re: [RFC 1/2] Protect larger order pages from breaking up Date: Sat, 17 Feb 2018 17:07:16 +0100 Message-ID: References: <20180216160110.641666320@linux.com> <20180216160121.519788537@linux.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Return-path: In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Randy Dunlap , Christoph Lameter , Mel Gorman Cc: Matthew Wilcox , linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, Thomas Schoebel-Theuer , andi-Vw/NltI1exuRpAAqCnN02g@public.gmane.org, Rik van Riel , Michal Hocko , Guy Shattah , Anshuman Khandual , Michal Nazarewicz , Vlastimil Babka , David Nellans , Laura Abbott , Pavel Machek , Dave Hansen , Mike Kravetz List-Id: linux-rdma@vger.kernel.org On February 16, 2018 7:02:53 PM GMT+01:00, Randy Dunlap wrote: >On 02/16/2018 08:01 AM, Christoph Lameter wrote: >> Control over this feature is by writing to /proc/zoneinfo. >> >> F.e. to ensure that 2000 16K pages stay available for jumbo >> frames do >> >> echo "2=2000" >/proc/zoneinfo >> >> or through the order= on the kernel command line. >> F.e. >> >> order=2=2000,4N2=500 > > >Please document the the kernel command line option in >Documentation/admin-guide/kernel-parameters.txt. > >I suppose that /proc/zoneinfo should be added somewhere in >Documentation/vm/ >but I'm not sure where that would be. It's in Documentation/sysctl/vm.txt and in 'man proc' [1] [1] https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/man5/proc.5 >thanks, -- Sincerely yours, Mike. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f200.google.com (mail-qk0-f200.google.com [209.85.220.200]) by kanga.kvack.org (Postfix) with ESMTP id A37B66B0003 for ; Sat, 17 Feb 2018 11:07:30 -0500 (EST) Received: by mail-qk0-f200.google.com with SMTP id r5so5277506qkb.22 for ; Sat, 17 Feb 2018 08:07:30 -0800 (PST) Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com. [148.163.158.5]) by mx.google.com with ESMTPS id d10si60528qth.432.2018.02.17.08.07.29 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 17 Feb 2018 08:07:29 -0800 (PST) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w1HG4YWE045423 for ; Sat, 17 Feb 2018 11:07:29 -0500 Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109]) by mx0b-001b2d01.pphosted.com with ESMTP id 2g6ewb4p71-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Sat, 17 Feb 2018 11:07:28 -0500 Received: from localhost by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sat, 17 Feb 2018 16:07:27 -0000 Date: Sat, 17 Feb 2018 17:07:16 +0100 In-Reply-To: References: <20180216160110.641666320@linux.com> <20180216160121.519788537@linux.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [RFC 1/2] Protect larger order pages from breaking up From: Mike Rapoprt Message-Id: Sender: owner-linux-mm@kvack.org List-ID: To: Randy Dunlap , Christoph Lameter , Mel Gorman Cc: Matthew Wilcox , linux-mm@kvack.org, linux-rdma@vger.kernel.org, akpm@linux-foundation.org, Thomas Schoebel-Theuer , andi@firstfloor.org, Rik van Riel , Michal Hocko , Guy Shattah , Anshuman Khandual , Michal Nazarewicz , Vlastimil Babka , David Nellans , Laura Abbott , Pavel Machek , Dave Hansen , Mike Kravetz On February 16, 2018 7:02:53 PM GMT+01:00, Randy Dunlap wrote: >On 02/16/2018 08:01 AM, Christoph Lameter wrote: >> Control over this feature is by writing to /proc/zoneinfo=2E >>=20 >> F=2Ee=2E to ensure that 2000 16K pages stay available for jumbo >> frames do >>=20 >> echo "2=3D2000" >/proc/zoneinfo >>=20 >> or through the order=3D on the kernel command line=2E >> F=2Ee=2E >>=20 >> order=3D2=3D2000,4N2=3D500 > > >Please document the the kernel command line option in >Documentation/admin-guide/kernel-parameters=2Etxt=2E > >I suppose that /proc/zoneinfo should be added somewhere in >Documentation/vm/ >but I'm not sure where that would be=2E It's in Documentation/sysctl/vm=2Etxt and in 'man proc' [1] [1] https://git=2Ekernel=2Eorg/pub/scm/docs/man-pages/man-pages=2Egit/tree= /man5/proc=2E5 >thanks, --=20 Sincerely yours, Mike=2E -- 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