[PATCH v7 0/5] Reset PCIe devices to address DMA problem on kdump with iommu

[Yinghai Lu]

On Mon, Jan 7, 2013 at 11:09 AM, Thomas Renninger <trenn at suse.de> wrote:
> e820: BIOS-provided physical RAM map:
> BIOS-e820: [mem 0x0000000000000100-0x000000000009bfff] usable
> BIOS-e820: [mem 0x0000000000100000-0x00000000bd2effff] usable
> BIOS-e820: [mem 0x00000000bd2f0000-0x00000000bd31bfff] reserved
> BIOS-e820: [mem 0x00000000bd31c000-0x00000000bd35afff] ACPI data
> BIOS-e820: [mem 0x00000000bd35b000-0x00000000bfffffff] reserved
> BIOS-e820: [mem 0x00000000e0000000-0x00000000efffffff] reserved
> BIOS-e820: [mem 0x00000000fe000000-0x00000000ffffffff] reserved
> BIOS-e820: [mem 0x0000000100000000-0x000000603fffffff] usable
> debug: ignoring loglevel setting.
> e820: last_pfn = 0x6040000 max_arch_pfn = 0x400000000
> NX (Execute Disable) protection: active
> e820: user-defined physical RAM map:
> user: [mem 0x0000000000000000-0x000000000009ffff] usable
> user: [mem 0x00000000070a0000-0x000000001effafff] usable
> user: [mem 0x00000000bd31c000-0x00000000bd35afff] ACPI data

can you make sure kdump kernel command line take
"memmap=256M$3584M" ?

it will make mmconf working.

> megasas: 06.504.01.00-rc1 Mon. Oct. 1 17:00:00 PDT 2012

also need to append "debug ignore_loglevel" to see why the disks are not
probed.

Thanks

Yinghai