[openib-general] Re: A Couple of IPoIB related issues

[Michael S. Tsirkin]

Quoting r. Hal Rosenstock <halr at voltaire.com>:
> Subject: A Couple of IPoIB related issues
> 
> Hi,
> 
> Two issues have been observed when running IPoIB:
> 
> 1. NETDEV WATCHDOG: ib0: transmit timed out
> ib0: transmit timeout: latency 360052
> 
> This occurs once a minute on heavy pings.

could you be running some kind of daemon with UDP?

> 2. __alloc_pages() warnings
> 
> here is a partial log quote:
> ---
> 
> The following is only an harmless informational message.
> Unless you get a _continuous_flood_ of these messages it means
> everything is working fine. Allocations from irqs cannot be
> perfectly reliable and the kernel is designed to handle that.
> ping: page allocation failure. order:0, mode:0x20

mode 20 is GFP_ATOMIC, so there's no reason to worry.
...

> Any idea on what could be causing these or how to go about isolating
> them ? Thanks.
> 
> -- Hal

-- 
MST