Linux AER reporting
Keith Busch
keith.busch at intel.com
Mon Aug 22 09:15:40 PDT 2016
Hi Nisha,
The Linux NVMe driver didn't add AER support until commit:
| commit a0a3408ee614848c27b0d36c2fe490da3b387b8d
| Author: Keith Busch <keith.busch at intel.com>
| Date: Mon Dec 7 15:30:31 2015 -0700
|
| NVMe: Add pci error handlers
If you don't have the commit, AER's may cause problems for NVMe.
I think 4.4 was the first kernel release to include it.
On Mon, Aug 22, 2016 at 08:52:10AM -0700, Nisha Miller wrote:
> Hi all,
>
> We have a PCIE SSD controller using NVME. This controller works on
> Windows and Linux. However, we are seeing a problem under Linux.
>
> In the nvme Linux driver in function nvme_kthread() the CSTS register
> is read once a second to check for controller status failure. In our
> case we see that occasionally this register is read as 0xFFFFFFFF.
> Whenever this happens, the kernel just hangs. This seems to be PCIe
> read error and we are trying to gather further information. How does
> one use Linux AER with the nvme driver?
>
> We are using Centos 7.2 with Kernel 3.19.8. PCIe AER has been enabled
> in the kernel and aerdriver.forceload=y is set in the command line.
>
> TIA
> Nisha Miller
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