From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f199.google.com (mail-io0-f199.google.com [209.85.223.199]) by kanga.kvack.org (Postfix) with ESMTP id 6D31F8E0001 for ; Mon, 10 Sep 2018 20:35:46 -0400 (EDT) Received: by mail-io0-f199.google.com with SMTP id f4-v6so2328053ioh.13 for ; Mon, 10 Sep 2018 17:35:46 -0700 (PDT) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id g18-v6sor11367346ita.91.2018.09.10.17.35.45 for (Google Transport Security); Mon, 10 Sep 2018 17:35:45 -0700 (PDT) MIME-Version: 1.0 References: <20180910232615.4068.29155.stgit@localhost.localdomain> <20180910234341.4068.26882.stgit@localhost.localdomain> In-Reply-To: <20180910234341.4068.26882.stgit@localhost.localdomain> From: Alexander Duyck Date: Mon, 10 Sep 2018 17:35:34 -0700 Message-ID: Subject: Re: [PATCH 1/4] mm: Provide kernel parameter to allow disabling page init poisoning Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm , LKML , linux-nvdimm@lists.01.org Cc: pavel.tatashin@microsoft.com, Michal Hocko , dave.jiang@intel.com, Ingo Molnar , Dave Hansen , jglisse@redhat.com, Andrew Morton , logang@deltatee.com, dan.j.williams@intel.com, "Kirill A. Shutemov" On Mon, Sep 10, 2018 at 4:43 PM Alexander Duyck wrote: > > From: Alexander Duyck > > On systems with a large amount of memory it can take a significant amount > of time to initialize all of the page structs with the PAGE_POISON_PATTERN > value. I have seen it take over 2 minutes to initialize a system with > over 12GB of RAM. Minor typo. I meant 12TB here, not 12GB. - Alex