From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Bug in kernel code?
Date: 28 Aug 2002 14:54:59 -0700 [thread overview]
Message-ID: <akjgrj$o7m$1@cesium.transmeta.com> (raw)
In-Reply-To: 20020827.212649.102436426.davem@redhat.com
Followup to: <20020827.212649.102436426.davem@redhat.com>
By author: "David S. Miller" <davem@redhat.com>
In newsgroup: linux.dev.kernel
>
> From: "Stephen Biggs" <s.biggs@softier.com>
> Date: Tue, 27 Aug 2002 21:29:06 -0700
>
> You tell me. You're saying a billion pages (((unsigned long)(~0)) >> 2) also crashes) is never
> going to be realistically possible?
>
> On a 32-bit system? No. x86 cpus are architectually limited
> to 64GB of memory, shift that right by PAGE_SIZE (13) and we're
> still within bounds. ^^^^^^^^^^^^^^
>
PAGE_SHIFT, 12.
The maximum possible page count of any known 32-bit system (64 GB @ 4K
for x86) is 2^24 pages.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2002-08-28 21:51 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3D6BB5C3.16057.2E515C@localhost>
[not found] ` <20020827.172304.22017977.davem@redhat.com>
2002-08-28 0:32 ` Bug in kernel code? Stephen C. Biggs
2002-08-28 0:29 ` David S. Miller
2002-08-28 0:40 ` Stephen C. Biggs
2002-08-28 0:42 ` David S. Miller
2002-08-28 1:09 ` Stephen C. Biggs
2002-08-28 1:09 ` David S. Miller
2002-08-28 1:24 ` Stephen C. Biggs
2002-08-28 1:23 ` David S. Miller
2002-08-28 2:42 ` Stephen C. Biggs
2002-08-28 3:39 ` David S. Miller
2002-08-28 3:57 ` Luca Barbieri
2002-08-28 3:58 ` David S. Miller
2002-08-28 4:10 ` Luca Barbieri
2002-08-28 4:07 ` David S. Miller
2002-08-28 4:29 ` Luca Barbieri
2002-08-28 4:29 ` Stephen Biggs
2002-08-28 4:26 ` David S. Miller
2002-08-28 21:54 ` H. Peter Anvin [this message]
2002-08-28 2:49 ` Re[2]: " Stephen C. Biggs
2002-08-28 0:54 ` Stephen C. Biggs
2002-08-28 0:25 Stephen C. Biggs
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