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Date: Tue, 13 Aug 2013 16:55:21 -0700
Message-ID: <CA+55aFyeEK6FfNC-7SjGdYVrjiES0V7JNUG==P5p6iu+UNiAfA@mail.gmail.com>
Subject: Re: [RFC v3 0/5] Transparent on-demand struct page initialization
 embedded in the buddy allocator
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Nathan Zimmer <nzimmer@sgi.com>
Cc: Mike Travis <travis@sgi.com>, Peter Anvin <hpa@zytor.com>,
        Ingo Molnar <mingo@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-mm <linux-mm@kvack.org>, Robin Holt <holt@sgi.com>,
        Rob Landley <rob@landley.net>,
        Daniel J Blueman <daniel@numascale-asia.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Yinghai Lu <yinghai@kernel.org>, Mel Gorman <mgorman@suse.de>
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On Tue, Aug 13, 2013 at 4:10 PM, Nathan Zimmer <nzimmer@sgi.com> wrote:
>
> The only mm structure we are adding to is a new flag in page->flags.
> That didn't seem too much.

I don't agree.

I see only downsides, and no upsides. Doing the same thing *without*
the downsides seems straightforward, so I simply see no reason for any
extra flags or tests at runtime.

               Linus
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