On Mon, 2008-12-08 at 15:56 +0000, Chandru wrote:
> Hi Bob,
>
> This problem was recently reported on a LS42 blade and the patch given by you
> also resolved the issue here too. However I made couple of changes to
> kexec-tools to ignore GART memory region and not have elf headers created to
> it. This patch also seemed to work on a LS21.
>
> Thanks,
> Chandru
Hi Chandru,
I tried your patch on kexec-tools, and I'm seeing a zero-length section
in /proc/vmcore (using readelf -e /proc/vmcore) right after the GART
hole:
/proc/iomem in the main kernel shows:
01000000-08ffffff : Crash kernel
20000000-23ffffff : GART
cfe4e000-cfe55fff : ACPI Tables
And readelf -e /proc/vmcore in the kdump kernel shows:
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
...
LOAD 0x000000000144d99c 0xffff810009000000 0x0000000009000000
0x0000000017000000 0x0000000017000000 RWE 0
LOAD 0x000000001844d99c 0xffff810024000000 0x0000000024000000
0x00000000abe4e000 0x00000000abe4e000 RWE 0
LOAD 0x00000000c429b99c 0xffff810024000000 0x0000000024000000
0x0000000000000000 0x0000000000000000 RWE 0
...
The first LOAD shown covers 09000000-20000000, the System RAM between
the Crash kernel and the GART.
The next LOAD covers 24000000-cfe4e000, which is the System RAM between
the GART and the ACPI Tables. So that all looks good.
Then the next LOAD is also at 24000000 with a 0 in the size fields.
I haven't had a chance to check the code yet.
Bob Montgomery
