Messages in this thread | | | Date | Tue, 30 Jun 2009 11:52:33 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [BUG 2.6.31-rc1] HIGHMEM64G causes hang in PCI init on 32-bit x86 |
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Rolf Eike Beer wrote: > H. Peter Anvin wrote: >> Mikael Pettersson wrote: >>> Thanks, 2.6.31-rc1 vanilla (which didn't boot) plus this one does boot. >>> /proc/iomem now looks as follows: >> ... as it should. So far so good, and this is a real problem. >> >> However, there is something that really bothers me: *why does this help >> on Mikael's system, which is PAE and therefore has a 64-bit >> resource_size_t*? This whole patch should be a no-op! There is still >> something that doesn't make sense. >> >> The use of "unsigned long" in ram_alignment() will overflow after 2^52 >> bytes, but again, that's not the issue here, since the highest "start" >> value we have is (0x2 << 32). > > I assume you meant "2^32" and (0x1 << 32)? >
No, I meant 2^52 and (0x2 << 32) [== 2^33.]
-hpa
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