Description of problem:
The Ethernet Channnel Bonding driver (bonding v.2.6.0) present in
kernel 2.6.9-5.EL has a bug in that it causes a kernel panic every
time the bonded interface is brought down. This happens only when the
bond is setup in mode 4 (IEEE 802.3ad mode a.k.a "dynamic link
This bug was reported and fixed by Intel in bonding v.2.6.1.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Setup a bond (say bond0) with two slaves in mode 4
2. ifdown bond0
kernel panic with OOPS
Created attachment 110179 [details]
FYI. This patch has made it upstream in the stable 2.6.10 kernel tree.
From 2.6.10 Changelog:
[PATCH] Fix for 802.3ad shutdown issue
The patch below fixes a problem with shutting down 802.3ad
bonds on the 2.6
kernel. Taking the interface down or removing the module
causes a stack
dump if spinlock debugging is enabled. This patch was
generated from the
This patch has been peer reviewed by our Linux software
and the fix has been verified by our test labs.
Signed-off-by: Mitch Williams <email@example.com>
Signed-off-by: Andrew Morton <firstname.lastname@example.org>
Signed-off-by: Jeff Garzik <email@example.com>
Ritesh has regressed and confirms that this issue is fixed in U1 beta.
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
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.