Messages in this thread | | | Date | Mon, 15 Mar 2004 10:19:48 +0100 | From | Ingo Molnar <> | Subject | Re: 2.6.4-mm1 - 4g patch breaks when X86_4G not selected |
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* Neil Brown <neilb@cse.unsw.edu.au> wrote:
> And it turns out it was spot on. Applying 4g-2.6.0-test2-mm2-A5.patch > (on top of preceding -mm1 patches) causes my server not to boot.
hm. Since your .config boots on akpm's box, this is some BIOS dependency creating an early-boot problem i fear. Debugging such bugs is hard. One way would be via the PC speaker:
movb $0x3,%al; outb %al,$0x61
this will cause a continuous beep on a typical PC - it works in 16-bit code too, doesnt have any memory-model assumptions, etc.
the first place to put this would be startup_32 - do we get to this point at all? (check CONFIG_4G first, to make sure the beep triggers.) If it beeps, then move it down until you find the place that crashes.
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