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xen-devel
Re: [Xen-devel] Re: Continuing problems booting
Gerd Hoffmann wrote:
Update: latest kernel (rc7 based) crashes. rc6 from somewhen last week
is the working one. rc7 messages:
unhandled page fault (ec=0003)
page table walk from c1c55000
l1[0x055] = 9c55061 1c55
-> rw access to r/o page?
EIP c140f4c3
c140f2d2 <alloc_bootmem_core>:
[ ... ]
c140f4c3: f3 ab rep stos %eax,%es:(%edi)
-> memset(page,0,PAGE_SIZE) ?
Dom0 domain builder says page tables are at c1c55000 -> c1c6a000
/me guesses the initial page tables are released to the page allocator,
but still they are mapped r/o => boom as soon as one happens to get
allocated. Which probably happens very soon on memory-constrained
machines like mine, while other might stay up longer and show strange
bugs later on ;)
Hm. You should see "XEN PAGETABLES" in the early reservations, which
should protect them from then on. Oh, look, its only doing it in the
64-bit setup.
BTW: The trick to see the messages on the laptop screen is:
kernel /xen-3.3.gz vga=text-80x50,keep
module /vmlinuz-2.6.29-rc7-tip-kraxel ro root=/dev/zen/rawhide \
console=hvc0
Hm, OK. But normal vga console should work. Works fine on 64-bit;
can't think of why they might differ...
J
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