kernel news – 12.01.2013

Posted: January 12, 2013 in kernel

-Paul E. McKenney has 3.8 regression fixes related to RCU:

Paul Gortmaker found some problems with no-CBs-CPU support in 3.8
mainline, and kindly supplied fixes. The first problem is soft-lockup
complaints that can occur on systems running with no-CBs CPUs that have
long periods of time where RCU is completely idle, which can happen on
some embedded systems. The second problem is a documentation error
for the “rcutree.rcu_nocb_poll” boot parameter. In this case, Paul Gortmaker
(rightly) noted that the need for “rcutree.” was inconsistent with the
“rcu_nocbs=” boot parameter. The fix therefore to make the boot
parameter named “rcu_nocb_poll”.

These problems only affect kernels built with the new CONFIG_RCU_NOCB_CPU
kernel parameter, but still should be fixed.

These fixes are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/urgent

-Trond Myklebust has a minor NFS client fix, Greg KH has three stable
kernels – 3.2.7, 3.4.25 and 3.0.58, Guenter Roeck has hwmon patches
for -rc4, and that’s all for today.

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