Messages in this thread |  | | From | "H. Peter Anvin" <> | Subject | Re: Bug in kernel code? | Date | 28 Aug 2002 14:54:59 -0700 |
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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.
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