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Subject: Re: PCI Express support for 2.4 kernel
From: Arjan van de Ven <arjanv@redhat.com>
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To: Vladimir Kondratiev <vladimir.kondratiev@intel.com>
Cc: Gabriel Paubert <paubert@iram.es>, linux-kernel@vger.kernel.org,
       Jeff Garzik <jgarzik@pobox.com>, Alan Cox <alan@redhat.com>,
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       zaitcev@redhat.com, hch@infradead.org
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> I should be missing something here. You have 256M of physical address=20
> space at 0xe0000000 occupied.
> You can do nothing with it, it is simply present. Then, ioremap maps it=20
> somewhere in high memory.
> It should not conflict with kernel RAM, for which trivial mapping (+3G)=20
> used.

the thing is that typically you have a maximum of 168Mb or so of
ioremap/vmalloc space (they share the same pool). That is, ff your
system has >=3D 1Gb of ram, if it has less ran the ioremap/vmalloc space
is bigger....


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