On 11/14/2017 5:40 AM, Wiles, Keith wrote:
On Nov 12, 2017, at 11:08 PM, Tan, Jianfeng <jianfeng....@intel.com> wrote:
Hi Jianjian,
-----Original Message-----
From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Jianjian Huo
Sent: Wednesday, November 8, 2017 5:13 AM
To: dev@dpdk.org
Subject: [dpdk-dev] DPDK memory error check and offline bad pages
Hi dpdk developers,
I have a question regarding how DPDK memory module treats memory
errors.
You mean hardware error which cannot be fixed by ECC?
In Linux kernel, it has mechanism (mcelog and EDAC) to monitor the memory
controller and report correctable/uncorrectable memory errors. Using some
configurations, if memory errors exceed threshold, system can offline bad
memory pages and avoid applications to access/crash.
DPDK app is just one of applications. Are there any framework to notify such
error to applications?
To notify is the first thing, to recover is another thing which takes more
effort.
Do we have similar mechanism in DPDK?
No, as far as I know.
Because DPDK runs as a normal user space application in Linux then the current
features in the Linux Kernel can be used correct?
I suppose so, but we still have not leveraged any of those features
explicitly AFAIK. Implicitly? Tend to be problematic, as DPDK only
translates physical address once at the very beginning.
Thanks,
Jianfeng
Thanks,
Jianfeng
Thanks,
Jianjian
Regards,
Keith
