linux-kernel - Re: Linux 3.19-rc3

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Message-ID: <CA+8MBbK__PcB_bi56Vtmy7nq01uXv7XO7iAqJfz73-XnCA9_3Q@mail.gmail.com>
Date:	Fri, 9 Jan 2015 19:17:50 -0800
From:	Tony Luck <tony.luck@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"Kirill A. Shutemov" <kirill@...temov.name>,
	Catalin Marinas <catalin.marinas@....com>,
	Mark Langsdorf <mlangsdo@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: Linux 3.19-rc3

On Fri, Jan 9, 2015 at 6:27 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
> Big pages are a bad bad bad idea. They work fine for databases, and
> that's pretty much just about it. I'm sure there are some other loads,
> but they are few and far between.

For HPC too. They tend not to do a lot of I/O (and when they do it is
from a few big files). Then they just sit crunching over gigabytes of
memory for seven and a half million years before doing:

    printf("Answer is %d\n", 42);

-Tony
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