Re: [PATCH] perf/x86/intel/uncore: fix IMC missing box initialization

[Stephane Eranian]

On Fri, Apr 24, 2015 at 7:03 AM, Vince Weaver <vincent.weaver@xxxxxxxxx> wrote:
> On Fri, 24 Apr 2015, Vince Weaver wrote:
>
>> [   79.473121] kernel BUG at mm/vmalloc.c:1335!
>> [   79.477705] invalid opcode: 0000 [#1] SMP
> ...
>> [   79.694391] Call Trace:
>> [   79.696997]  <IRQ>
>> [   79.699090]  [<ffffffff811b2130>] get_vm_area_caller+0x40/0x50
>> [   79.705505]  [<ffffffff81039f4d>] ? snb_uncore_imc_init_box+0x6d/0x90
>
> This maps to:
>
>         static void snb_uncore_imc_init_box(struct intel_uncore_box *box) {
>                 ...
>                 box->io_addr = ioremap(addr, SNB_UNCORE_PCI_IMC_MAP_SIZE);
>
> The machine I am seeing this on is a Haswell desktop, Intel 6/60/3.
>
I also got that on one Lenovo IvyBridge laptop but I had just updated the BIOS.
It was working before with older kernels. I am not sure what is going on here.
It will be easier to debug once I get my desktop Haswell back and setup with
serial console. Need to verify that the address of the BAR is the same compared
with older kernels.

Maybe Bjorn can shed some lights. Why would ioremap() die like this in the
latest 4.0 tree.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/