[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <466D8D4B.8050100@zytor.com>
Date: Mon, 11 Jun 2007 10:58:35 -0700
From: "H. Peter Anvin" <hpa@...or.com>
To: Rene Herman <rene.herman@...il.com>
CC: Dave Jones <davej@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Andy Whitcroft <apw@...dowen.org>,
Steve Fox <drfickle@...ibm.com>, Mel Gorman <mel@....ul.ie>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] move the kernel to 16MB for NUMA-Q
Rene Herman wrote:
>
> Aligning the kernel image on 4M could gain an additional TLB entry if
> the kernel image would fit in one (4M aligned) hugepage, but not in the
> 3M that's left after loading the kernel at 1M physical. And that stuff
> about the MTRRs...
>
Yup. Most CPUs won't actually use a largepage for the kernel if it's
below 4 MB (2 MB with PAE, so that's what x86-64 uses.)
-hpa
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists