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Message-ID: <20130124122849.GC3104@gmail.com> Date: Thu, 24 Jan 2013 13:28:49 +0100 From: Ingo Molnar <mingo@...nel.org> To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Cc: mingo@...e.hu, paul.gortmaker@...driver.com, fweisbec@...il.com, linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org Subject: Re: [GIT PULL rcu/urgent] Fixes for RCU regressions in 3.8 * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote: > Hello, Ingo, > > 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=<cpumap>" 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 > > Thanx, Paul > > ------------------> > Paul Gortmaker (2): > rcu: Prevent soft-lockup complaints about no-CBs CPUs > rcu: Make rcu_nocb_poll an early_param instead of module_param > > Documentation/kernel-parameters.txt | 2 +- > kernel/rcutree_plugin.h | 13 ++++++++++--- > 2 files changed, 11 insertions(+), 4 deletions(-) Pulled, thanks a lot Paul! Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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