[dpdk-dev] [PATCH v4] eal: Set numa node value for system which not support it.

[Thomas Monjalon]

26/06/2017 11:14, Sergio Gonzalez Monroy:
> On 23/06/2017 14:02, Thomas Monjalon wrote:
> > 22/06/2017 17:15, Sergio Gonzalez Monroy:
> >> Just fyi, the summary line should be lowercase apart from acronyms (DPDK
> >> guidelines).
> >>
> >> On 11/05/2017 02:56, Tonghao Zhang wrote:
> >>> The NUMA node information for PCI devices provided through
> >>> sysfs is invalid for AMD Opteron(TM) Processor 62xx and 63xx
> >>> on Red Hat Enterprise Linux 6, and VMs on some hypervisors.
> >>> It is good to see more checking for valid values.
> >>>
> >>> Signed-off-by: Tonghao Zhang <nic at opencloud.tech>
> >>> ---
> >> IMHO the message could be slightly improved by adding some of the
> >> replies that you made to your v3.
> >> ie. Typical wrong numa node in VMs
> >>
> >> $ cat /sys/devices/pci0000:00/0000:00:18.6/numa_node
> >> -1
> > [...]
> >> The code changes look fine, so I leave it to Thomas regarding the commit
> >> message :)
> >>
> >> Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy at intel.com>
> > Applied, thanks
> 
> It looks like some systems have quite a few devices that report -1 as 
> numa_node value causing lots of warning messages being printed.
> Quick fixes that come to mind would be:
> 1) Change log level to DEBUG

As it is important for performance, it should not be just for DEBUG.

> 2) Add static var to only print the message once.

Yes good idea.

> I also think that the message itself should show at least the BDF to at 
> least know which devices are reporting bad numa_node values.

With the static variable, we will have only the first device BDF.
Is it relevant?