+++ This bug was initially created as a clone of Bug #515274 +++
The network utilization graphics in ganglia report shows peaks
of petabytes, when the network interface is just Gigabit eth.
Broadcom developer (Michael Chan) confirmed that NIC BCM5706 and
BCM5708 are very similar in design so BCM5706 could suffer the same
problem described below:
The statistics block DMA on 5708 can be messed up occasionally on the
average of about once per hour. If the user is reading the counters
within one second after the corruption, the counters will be all
messed up. One second later, the counters will be ok again until the
next corruption occurs.
The workaround is to disable the periodic statistics DMA. Instead,
we manually trigger the DMA once a second in bnx2_timer(). This
manual trigger of the DMA avoids the problem.
Applied on net-next-2.6:
Author: Michael Chan <email@example.com>
Date: Fri Aug 21 16:20:46 2009 +0000
bnx2: Apply BROKEN_STATS workaround to 5706 and 5708.
Add flag to expand the workaround to both chips.
Signed-off-by: Michael Chan <firstname.lastname@example.org>
Signed-off-by: David S. Miller <email@example.com>
Created attachment 364026 [details]
patch for RHEL5u5
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update
You can download this test kernel from http://people.redhat.com/dzickus/el5
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An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
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