Date: Sun, 30 May 2004 12:01:31 -0600 From: Scott Long <scottl@freebsd.org> To: Don Bowman <don@sandvine.com> Cc: "'current@freebsd.org'" <current@freebsd.org> Subject: Re: too many holes in address space, memory ignored Message-ID: <40BA217B.50209@freebsd.org> In-Reply-To: <FE045D4D9F7AED4CBFF1B3B813C85337051D8DDC@mail.sandvine.com> References: <FE045D4D9F7AED4CBFF1B3B813C85337051D8DDC@mail.sandvine.com>
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Don Bowman wrote: > On my 4GB system with PAE disabled, i'm getting these > two messages out on boot: > 262144K of memory above 4GB ignored > Too many holes in the physical address space, giving up > > I'm assuming the first one is due to the address > space needing locations for memory mapped io like > PCI, so some ram is wasted. Actually, it's the opposite. The northbridge is remapping the memory that is normally hidden by the PCI window so that it doesn't get wasted. > The second... this comes from sys/i386/i386/machdep.c > Is there any reason i wouldn't just increase > 'vm_paddr_t phys_avail[10];' to a number > 10? > (and/or increase PHYSMAP_SIZE?) > Can't comment on the safety of that, other than to wonder if you have a the BIOS set to shadow a bunch of <1MB segments. Scott
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