Re: [PATCH v7u1 00/31] x86, boot, 64bit: Add support for loadingramdisk and bzImage above 4G

[Yinghai Lu]

On Tue, Jan 15, 2013 at 8:43 AM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
> On Tue, Jan 15, 2013 at 4:19 AM, Stefano Stabellini
> <stefano.stabellini@xxxxxxxxxxxxx> wrote:
>>> could be found at:
>>>
>>>         git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-x86-boot
>>
>> I tried to boot this kernel as PV guest with 2GB of RAM, but
>> unfortunately it crashes early on at boot (earlyprintk=xen log
>> appended).
>>
>>
>>
>> mapping kernel into physical memory
>> about to get started...
>> [    0.000000] Initializing cgroup subsys cpuset
>> [    0.000000] Linux version 3.8.0-rc3+ (sstabellini@st22) (gcc version 4.4.5 (Debian 4.4.5-8) ) #4 SMP Tue Jan 15 12:11:59 UTC 2013
>> [    0.000000] Command line: root=/dev/xvda1 rw loglevel=9 debug console=hvc0 earlyprintk=xen
>> [    0.000000] ACPI in unprivileged domain disabled
>> [    0.000000] e820: BIOS-provided physical RAM map:
>> [    0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
>> [    0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
>> [    0.000000] Xen: [mem 0x0000000000100000-0x000000007fffffff] usable
>> [    0.000000] bootconsole [xenboot0] enabled
>> [    0.000000] NX (Execute Disable) protection: active
>> [    0.000000] DMI not present or invalid.
>> [    0.000000] e820: update [mem 0x00000000-0x0000ffff] usable ==> reserved
>> [    0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
>> [    0.000000] No AGP bridge found
>> [    0.000000] e820: last_pfn = 0x80000 max_arch_pfn = 0x400000000
>> [    0.000000] Base memory trampoline at [ffff88000009a000] 9a000 size 24576
>> [    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
>> [    0.000000]  [mem 0x00000000-0x000fffff] page 4k
>> [    0.000000] init_memory_mapping: [mem 0x7fe00000-0x7fffffff]
>> [    0.000000]  [mem 0x7fe00000-0x7fffffff] page 4k
>> [    0.000000] BRK [0x023b8000, 0x023b8fff] PGTABLE
>> [    0.000000] BRK [0x023b9000, 0x023b9fff] PGTABLE
>> [    0.000000] init_memory_mapping: [mem 0x7c000000-0x7fdfffff]
>> [    0.000000]  [mem 0x7c000000-0x7fdfffff] page 4k
>> [    0.000000] BRK [0x023ba000, 0x023bafff] PGTABLE
>> [    0.000000] BRK [0x023bb000, 0x023bbfff] PGTABLE
>> [    0.000000] BRK [0x023bc000, 0x023bcfff] PGTABLE
>> [    0.000000] init_memory_mapping: [mem 0x00100000-0x7bffffff]
>> [    0.000000]  [mem 0x00100000-0x7bffffff] page 4k
>> (XEN) d15:v0: unhandled page fault (ec=0000)
>> (XEN) Pagetable walk from ffffea0000080330:
>> (XEN)  L4[0x1d4] = 0000000000000000 ffffffffffffffff
>> (XEN) domain_crash_sync called from entry.S
>> (XEN) Domain 15 (vcpu#0) crashed on cpu#3:
>> (XEN) ----[ Xen-4.3-unstable  x86_64  debug=y  Not tainted ]----
>
> ok, i think i know the cause for now,  will check if there is good way
> to fix it.

Can you please test attached patch?

Thanks

Yinghai

Attachment: fix_xen_2g.patch
Description: Binary data