[openib-general] A Couple of IPoIB related issues

[Hal Rosenstock]

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.

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
 [__alloc_pages+980/1168] __alloc_pages+0x3d4/0x490
 [<c01470d4>] __alloc_pages+0x3d4/0x490
 [kmem_getpages+50/160] kmem_getpages+0x32/0xa0
 [<c0149cf2>] kmem_getpages+0x32/0xa0
 [cache_grow+179/368] cache_grow+0xb3/0x170
 [<c014aa63>] cache_grow+0xb3/0x170
 [cache_alloc_refill+365/576] cache_alloc_refill+0x16d/0x240
 ...

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

-- Hal