Re: [Xen-devel] Failure to get memory for GATT table, again

[Jacob Gorm Hansen <jacobg@xxxxxxx>]

Jacob Gorm Hansen wrote:
> Jacob Gorm Hansen wrote:
> I instrumented some more, apparently the page has the wrong owner, 
> causing the mmu update to fail. The page is almost at the top of memory, 
> probably outside of dom0s reservation.
Remming out the ownership test in xen's get_page() made the intel-agp 
module load without errors. Unless someone beats me to it, I will try to 
figure out what makes the AGPGART code wish to exceed dom0s memory area 
tomorrow Seattle time.
The fglrx module also loads fine, but attempting to start X ends up like 
this;
Oops: 0000 [#1]
DEBUG_PAGEALLOC
Modules linked in: fglrx intel_agp agpgart
CPU:    0
EIP:    0061:[<c0143596>]    Tainted: P      VLI
EFLAGS: 00213206   (2.6.10-xen0)
EIP is at remap_pfn_range+0x176/0x220
eax: c0523000   ebx: 000e0001   ecx: 00000027   edx: 000e0001
esi: 00062000   edi: f23e7188   ebp: 00162000   esp: f22efe8c
ds: 007b   es: 007b   ss: 0069
Process X (pid: 6571, threadinfo=f22ee000 task=f6b63b20)
Stack: 00162000 b7c00000 000dff9f 00062000 f23f6b7c f23f5ddc b7d62000 
f23f6b7c
       b7c62000 f125ac70 f125ac70 f8921260 f88f5781 f125ac70 b7c62000 
0002839f
       00100000 00000027 f18e5f6c f89213fc f88f66ec f18e5f6c f125ac70 
00000004
Call Trace:
 [<f88f5781>] __ke_vm_map+0x191/0x250 [fglrx]
 [<f88f66ec>] firegl_mmap+0x1bc/0x460 [fglrx]
 [<c014629f>] do_mmap_pgoff+0x35f/0x730
 [<c0110e76>] old_mmap+0xd6/0x110
 [<c0109530>] syscall_call+0x7/0xb
Code: e0 05 01 d0 8b 00 f6 c4 08 74 2a 8b 44 24 44 89 d9 c1 e1 0c 09 c1 
f6 c1 01 74 18 a1 80 c8 4e c0 89 ca c1 ea 0c 81 e1 ff 0f 00 00 <8b> 04 
90 c1 e0 0c 09 c1 89 0f 43 83 c7 04 81 c6 00 10 00 00 74

-- however, I just blindly replaced all virt_to_phys calls with 
virt_to_machine in the wrapper code, and that is probably wrong. Problem 
is if there are similar address conversions inside the binary-only part 
of the module.
Jacob


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