>
> OK, I found this one (sorry for the delay, I was away).
>
> Does this work for you? It works for me...
Yes, it works! Thanks!
Now the kernel starts booting but crashes with
Kernel Panic - not syncing: Kernel compiled for Pentium+, requires TSC feature!
lguest: CRASH: Kernel compiled for Pentium+, requires TSC feature!
I think it was already reported on this mailing list, but I can't find it now.
This is Linus current git head with your patch.
# cat /proc/cpuinfo
processor : 0
vendor_id : CentaurHauls
cpu family : 6
model : 13
model name : VIA C7 Processor 1800MHz
stepping : 0
cpu MHz : 1795.528
cache size : 128 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse *tsc* msr pae mce cx8 apic sep mtrr cmov pat
clflush acpi mmx fxsr
sse sse2 tm nx pni est tm2 xtpr rng rng_en ace ace_en ace2 ace2_en phe phe_en
pmm pmm_en
bogomips : 3592.71
clflush size : 64
>
> Thanks very much for your report!
> Rusty.
> ==
> Robert Bragg's 5dc331852848a38ca00a2817e5b98a1d0561b116 tightened
> (ie. fixed) the checking in __get_vm_area, and it broke lguest.
>
> lguest should pass a valid "end" parameter, not some random constant.
>
> Signed-off-by: Rusty Russell <[EMAIL PROTECTED]>
> Cc: Robert Bragg <[EMAIL PROTECTED]>
>
> diff -r f5dc1442dc61 drivers/lguest/core.c
> --- a/drivers/lguest/core.c Tue Mar 04 14:21:38 2008 +1100
> +++ b/drivers/lguest/core.c Tue Mar 04 21:06:41 2008 +1100
> @@ -71,9 +71,11 @@ static __init int map_switcher(void)
>
> /* Now we reserve the "virtual memory area" we want: 0xFFC00000
> * (SWITCHER_ADDR). We might not get it in theory, but in practice
> - * it's worked so far. */
> + * it's worked so far. The +1 is because __get_vm_area allocates a
> + * guard page, so we need space for that. */
> switcher_vma = __get_vm_area(TOTAL_SWITCHER_PAGES * PAGE_SIZE,
> - VM_ALLOC, SWITCHER_ADDR, VMALLOC_END);
> + VM_ALLOC, SWITCHER_ADDR, SWITCHER_ADDR
> + + (TOTAL_SWITCHER_PAGES+1) * PAGE_SIZE);
> if (!switcher_vma) {
> err = -ENOMEM;
> printk("lguest: could not map switcher pages high\n");
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