linux-kernel - Re: [PATCH 1/4] mm: Provide kernel parameter to allow disabling page init poisoning

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Message-ID: <CAKgT0UcP4G-Y8ad2yGh_kGSSD4ry-Z+FtZ+6wwFzUS3YkpeFyg@mail.gmail.com>
Date:   Mon, 10 Sep 2018 17:35:34 -0700
From:   Alexander Duyck <alexander.duyck@...il.com>
To:     linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
        linux-nvdimm@...ts.01.org
Cc:     pavel.tatashin@...rosoft.com, Michal Hocko <mhocko@...e.com>,
        dave.jiang@...el.com, Ingo Molnar <mingo@...nel.org>,
        Dave Hansen <dave.hansen@...el.com>, jglisse@...hat.com,
        Andrew Morton <akpm@...ux-foundation.org>, logang@...tatee.com,
        dan.j.williams@...el.com,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH 1/4] mm: Provide kernel parameter to allow disabling page
 init poisoning

On Mon, Sep 10, 2018 at 4:43 PM Alexander Duyck
<alexander.duyck@...il.com> wrote:
>
> From: Alexander Duyck <alexander.h.duyck@...el.com>
>
> 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