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*---. Merge branches 'torture.2014.11.03a', 'cpu.2014.11.03a', 'doc.2014.11.13a', ↵Paul E. McKenney2014-11-1311-19/+8
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'fixes.2014.11.13a', 'signal.2014.10.29a' and 'rt.2014.10.29a' into HEAD cpu.2014.11.03a: Changes for per-CPU variables. doc.2014.11.13a: Documentation updates. fixes.2014.11.13a: Miscellaneous fixes. signal.2014.10.29a: Signal changes. rt.2014.10.29a: Real-time changes. torture.2014.11.03a: torture-test changes.
| | | * rcu: Remove redundant TREE_PREEMPT_RCU config optionPranith Kumar2014-10-2932-32/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PREEMPT_RCU and TREE_PREEMPT_RCU serve the same function after TINY_PREEMPT_RCU has been removed. This patch removes TREE_PREEMPT_RCU and uses PREEMPT_RCU config option in its place. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| | | * rcu: Unify boost and kthread prioritiesClark Williams2014-10-291-1/+1
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename CONFIG_RCU_BOOST_PRIO to CONFIG_RCU_KTHREAD_PRIO and use this value for both the per-CPU kthreads (rcuc/N) and the rcu boosting threads (rcub/n). Also, create the module_parameter rcutree.kthread_prio to be used on the kernel command line at boot to set a new value (rcutree.kthread_prio=N). Signed-off-by: Clark Williams <clark.williams@gmail.com> [ paulmck: Ported to rcu/dev, applied Paul Bolle and Peter Zijlstra feedback. ] Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| | * rcu: Remove CONFIG_RCU_CPU_STALL_VERBOSEPaul E. McKenney2014-10-2811-11/+0
| |/ | | | | | | | | | | | | | | | | | | | | The CONFIG_RCU_CPU_STALL_VERBOSE Kconfig parameter causes preemptible RCU's CPU stall warnings to dump out any preempted tasks that are blocking the current RCU grace period. This information is useful, and the default has been CONFIG_RCU_CPU_STALL_VERBOSE=y for some years. It is therefore time for this commit to remove this Kconfig parameter, so that future kernel builds will always act as if CONFIG_RCU_CPU_STALL_VERBOSE=y. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* | rcutorture: Remove stale test configurationsPranith Kumar2014-11-0371-1588/+0
| | | | | | | | | | | | | | Remove rcutorture configuration files which are no longer necessary. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* | rcutorture: Enable RCU self test in configsPranith Kumar2014-11-036-0/+12
|/ | | | | | | Add config and boot parameters to enable the self tests in rcutorture testing. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* locktorture: Support rwlocksDavidlohr Bueso2014-09-303-0/+8
| | | | | | | | | | Add a "rw_lock" torture test to stress kernel rwlocks and their irq variant. Reader critical regions are 5x longer than writers. As such a similar ratio of lock acquisitions is seen in the statistics. In the case of massive contention, both hold the lock for 1/10 of a second. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Rename rcutorture_runnable parameterPaul E. McKenney2014-09-161-1/+1
| | | | | | | | This commit changes rcutorture_runnable to torture_runnable, which is consistent with the names of the other parameters and is a bit shorter as well. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* locktorture: Add test scenario for rwsem_lockPaul E. McKenney2014-09-163-0/+8
| | | | Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* locktorture: Add test scenario for mutex_lockPaul E. McKenney2014-09-163-0/+8
| | | | Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* locktorture: Make torture scripting account for new _runnable namePaul E. McKenney2014-09-161-1/+1
| | | | Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* Merge branch 'rcu-tasks.2014.09.10a' into HEADPaul E. McKenney2014-09-167-0/+33
|\ | | | | | | rcu-tasks.2014.09.10a: Add RCU-tasks flavor of RCU.
| * rcutorture: Add RCU-tasks tests to default rcutorture listPaul E. McKenney2014-09-101-0/+3
| | | | | | | | | | | | | | | | | | Although the test cases have been added, they must be specified explicitly via the kvm.sh --configs argument in order to run them. This commit therefore adds the RCU-tasks tests to the CFLIST so that they will be run automatically by default. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| * rcutorture: Add RCU-tasks test casesPaul E. McKenney2014-09-076-0/+30
| | | | | | | | | | | | | | | | This commit adds the TASKS01 and TASKS02 Kconfig fragments, along with the corresponding TASKS01.boot and TASKS02.boot boot-parameter files specifying that rcutorture test RCU-tasks instead of the default flavor. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* | rcutorture: Specify CONFIG_CPUMASK_OFFSTACK=y for TREE07Paul E. McKenney2014-09-071-0/+1
| | | | | | | | | | | | | | | | This commit specifies offstack cpumasks in TREE07 in order to catch references to unallocated cpumask_var_t variables. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
* | rcutorture: Specify MAXSMP=y for TREE01Paul E. McKenney2014-09-072-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | Setting CONFIG_MAXSMP=y causes cpumasks to be moved offstack, which introduces the possibility of NULL cpumask_var_t pointers. This commit therefore enables CONFIG_MAXSMP=y in TREE01 to increase test coverage. However, because CONFIG_MAXSMP=y implies 8192 CPUs, we need to use the maxcpus= boot parameter to limit the number of CPUs to something reasonable, which in turn requires updating the scripts to handle this. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
* | rcutorture: Test partial nohz_full= configurationPaul E. McKenney2014-09-072-1/+2
|/ | | | | | | | | | | The current set of tests covers only cases where either all possible CPUs are nohz_full= CPUs or none of them are. Because there have been some recent bug escapes in cases where only some of the CPUs are nohz_full= CPUs, this commit add a configuration where only half of the CPUs are nohz_full= CPUs. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
* rcu: Remove CONFIG_PROVE_RCU_DELAYPaul E. McKenney2014-07-0915-15/+0
| | | | | | | | | The CONFIG_PROVE_RCU_DELAY Kconfig parameter doesn't appear to be very effective at finding race conditions, so this commit removes it. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Andi Kleen <ak@linux.intel.com> [ paulmck: Remove definition and uses as noted by Paul Bolle. ]
* rcutorture: Test RCU-sched primitives in TREE_PREEMPT_RCU kernelsPaul E. McKenney2014-05-141-0/+1
| | | | | | | | This commit ensures that RCU-sched primitives are tested in TREE_PREEMPT_RCU kernels, a combination that was previously omitted. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Add tracing-enabled variant of TREE02Paul E. McKenney2014-05-141-0/+25
| | | | | | | | This commit adds a CONFIG_RCU_TRACE=y version of TREE02 for debugging purposes. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* locktorture: Add vestigial locktorture configurationPaul E. McKenney2014-02-236-0/+59
| | | | | | | | This commit adds a trivial set of configuration files for lock torturing. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Introduce "rcu" directory level underneath configsPaul E. McKenney2014-02-2395-1/+1
| | | | | | | | | | | This commit uses the standard software ploy of introducing another level of indirection below the configs directory. This allows each torture-test suite to have its own set of Kconfig files, boot parameters, and version-specific scripts. Initially, we have only rcu, but lock will follow soonish. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Remove RCU dependencies from ver_functions.sh APIPaul E. McKenney2014-02-234-34/+57
| | | | | | | | | | | The current set of functions in ver_functions.sh have APIs that are specific to RCU. This commit therefore makes an RCU-independent function that outputs version-specific boot arguments. This has the benefit that a test-type-independent call in kvm-test-1-rcu.sh can now handle any type of test, given a test-type-specific set of files in a configs directory. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Create CFcommon file for common Kconfig parametersPaul E. McKenney2014-02-2316-15/+2
| | | | | | | | | | | | Currently, CONFIG_RCU_TORTURE_TEST=y is hardcoded into the kvm-test-1-rcu.sh script and CONFIG_PRINTK_TIME=y is mentioned in each and every configs file. This commit creates a CFcommon file for these two Kconfig parameters, and modifies kvm-test-1-rcu.sh to copy this new file into the .config file during the build. This change will allow these scripts to operate on torture types other than just rcutorture. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Create config files for scripted test-the-test testingPaul E. McKenney2014-02-232-0/+9
| | | | | | | | | This commit adds a pair of files in the configs directory to allow test-the-test runs of rcutorture via a "--configs BUSTED" argument to the kvm.sh script. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Reduce SRCU-N number of CPUsPaul E. McKenney2014-02-181-1/+1
| | | | | | | | | | Both SRCU-P and SRCU-N specify eight CPUs, which results in four iterations for a parallel run on 32 CPUs. This commit reduces SRCU-N to four CPUs (but leaving SRCU-P at eight) to speed up parallel runs, while maintaining essentially the same test coverage. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Stop tracking FSF's postal addressPaul E. McKenney2013-12-034-8/+8
| | | | | | | | | | | All of the rcutorture scripts has the usual GPL header, which contains a long-obsolete postal address for FSF. To avoid the need to track the FSF office's movements, this commit substitutes the URL where GPL may be found. Reported-by: Greg KH <gregkh@linuxfoundation.org> Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Add tracing-enabled version of TREE08Paul E. McKenney2013-12-031-0/+26
| | | | | | | | | | The TREE08 Kconfig fragment does not enable tracing, which is appropriate for its test case. However, this can be inconvenient in cases where TREE08 locates RCU bugs. This commit therefore adds a TREE08-T that differs from TREE08 only in enabling CONFIG_RCU_TRACE. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Greg KH <gregkh@linuxfoundation.org>
* rcutorture: Refactor TINY_RCU test casesPaul E. McKenney2013-12-037-90/+28
| | | | | | | | | The TINY_RCU test cases were first put in place many years ago, and have been incrementally modified rather than being reworked. This commit therefore completes a long-overdue reworking of the TINY_RCU test cases. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Greg KH <gregkh@linuxfoundation.org>
* rcutorture: Refactor TREE_RCU test casesPaul E. McKenney2013-12-0333-480/+233
| | | | | | | | | The TREE_RCU test cases were first put in place many years ago, and have been incrementally modified rather than being reworked. This commit therefore completes a long-overdue reworking of the TREE_RCU test cases. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Greg KH <gregkh@linuxfoundation.org>
* rcutorture: Add SRCU Kconfig-fragment filesPaul E. McKenney2013-12-034-0/+18
| | | | | | | Use .boot facility to ease inclusion of SRCU into automated testing. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Greg KH <gregkh@linuxfoundation.org>
* rcutorture: Add v3.12 version, which adds sysidle testingPaul E. McKenney2013-12-0323-0/+521
| | | | | | | | | The v3.12 version of the kernel added the CONFIG_NO_HZ_FULL_SYSIDLE Kconfig parameter, so this commit adds a version transition at that point. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Greg KH <gregkh@linuxfoundation.org>
* rcutorture: Add per-version default Kconfig fragments and module parametersPaul E. McKenney2013-12-0310-2/+227
| | | | | | | | | Different Kconfig parameters apply to different kernel versions, as do different rcutorture module parameters. This commit allows the rcutorture test scripts to adjust for different kernel versions. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Greg KH <gregkh@linuxfoundation.org>
* rcutorture: Add kernel-version argumentPaul E. McKenney2013-12-0342-0/+897
| | | | | Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Greg KH <gregkh@linuxfoundation.org>
* rcutorture: Add KVM-based test frameworkPaul E. McKenney2013-12-0324-0/+553
This commit adds the test framework that I used to test RCU under KVM. This consists of a group of scripts and Kconfig fragments. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Greg KH <gregkh@linuxfoundation.org>
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