From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f198.google.com (mail-io0-f198.google.com [209.85.223.198]) by kanga.kvack.org (Postfix) with ESMTP id 542876B02F3 for ; Wed, 31 May 2017 10:09:06 -0400 (EDT) Received: by mail-io0-f198.google.com with SMTP id l78so14375723iod.4 for ; Wed, 31 May 2017 07:09:06 -0700 (PDT) Received: from resqmta-ch2-08v.sys.comcast.net (resqmta-ch2-08v.sys.comcast.net. [2001:558:fe21:29:69:252:207:40]) by mx.google.com with ESMTPS id o197si14969122ioo.21.2017.05.31.07.09.05 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 31 May 2017 07:09:05 -0700 (PDT) Date: Wed, 31 May 2017 09:09:04 -0500 (CDT) From: Christoph Lameter Subject: Re: 4.12-rc ppc64 4k-page needs costly allocations In-Reply-To: <87h9014j7t.fsf@concordia.ellerman.id.au> Message-ID: References: <87h9014j7t.fsf@concordia.ellerman.id.au> Content-Type: text/plain; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Michael Ellerman Cc: Hugh Dickins , "Aneesh Kumar K.V" , linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org On Wed, 31 May 2017, Michael Ellerman wrote: > > SLUB: Unable to allocate memory on node -1, gfp=0x14000c0(GFP_KERNEL) > > cache: pgtable-2^12, object size: 32768, buffer size: 65536, default order: 4, min order: 4 > > pgtable-2^12 debugging increased min order, use slub_debug=O to disable. Ahh. Ok debugging increased the object size to an order 4. This should be order 3 without debugging. > > I did try booting with slub_debug=O as the message suggested, but that > > made no difference: it still hoped for but failed on order:4 allocations. I am curious as to what is going on there. Do you have the output from these failed allocations? -- 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