Re: PCI Express support for 2.4 kernel

Arjan van de Ven
2003-12-15T13:16:55Z

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> I should be missing something here. You have 256M of physical address
> space at 0xe0000000 occupied.
> You can do nothing with it, it is simply present. Then, ioremap maps it
> somewhere in high memory.
> It should not conflict with kernel RAM, for which trivial mapping (+3G)
> 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 >= 1Gb of ram, if it has less ran the ioremap/vmalloc space
is bigger....

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