1 This document gives a brief rationale for the TREE_RCU-related test 2 cases, a group that includes PREEMPT_RCU. 3 4 5 Kconfig Parameters: 6 7 CONFIG_DEBUG_LOCK_ALLOC -- Do three, covering CONFIG_PROVE_LOCKING & not. 8 CONFIG_DEBUG_OBJECTS_RCU_HEAD -- Do one. 9 CONFIG_HZ_PERIODIC -- Do one. 10 CONFIG_NO_HZ_IDLE -- Do those not otherwise specified. (Groups of two.) 11 CONFIG_NO_HZ_FULL -- Do two, one with partial CPU enablement. 12 CONFIG_PREEMPT -- Do half. (First three and #8.) 13 CONFIG_PROVE_LOCKING -- Do several, covering CONFIG_DEBUG_LOCK_ALLOC=y and not. 14 CONFIG_PROVE_RCU -- Hardwired to CONFIG_PROVE_LOCKING. 15 CONFIG_RCU_BOOST -- one of PREEMPT_RCU. 16 CONFIG_RCU_FANOUT -- Cover hierarchy, but overlap with others. 17 CONFIG_RCU_FANOUT_LEAF -- Do one non-default. 18 CONFIG_RCU_NOCB_CPU -- Do three, one with no rcu_nocbs CPUs, one with 19 rcu_nocbs=0, and one with all rcu_nocbs CPUs. 20 CONFIG_RCU_TRACE -- Do half. 21 CONFIG_SMP -- Need one !SMP for PREEMPT_RCU. 22 CONFIG_RCU_EXPERT=n -- Do a few, but these have to be vanilla configurations. 23 CONFIG_RCU_EQS_DEBUG -- Do at least one for CONFIG_NO_HZ_FULL and not. 24 25 RCU-bh: Do one with PREEMPT and one with !PREEMPT. 26 RCU-sched: Do one with PREEMPT but not BOOST. 27 28 29 Boot parameters: 30 31 nohz_full - do at least one. 32 maxcpu -- do at least one. 33 rcupdate.rcu_self_test_bh -- Do at least one each, offloaded and not. 34 rcupdate.rcu_self_test_sched -- Do at least one each, offloaded and not. 35 rcupdate.rcu_self_test -- Do at least one each, offloaded and not. 36 rcutree.rcu_fanout_exact -- Do at least one. 37 38 39 Kconfig Parameters Ignored: 40 41 CONFIG_64BIT 42 43 Used only to check CONFIG_RCU_FANOUT value, inspection suffices. 44 45 CONFIG_PREEMPT_COUNT 46 CONFIG_PREEMPT_RCU 47 48 Redundant with CONFIG_PREEMPT, ignore. 49 50 CONFIG_RCU_BOOST_DELAY 51 52 Inspection suffices, ignore. 53 54 CONFIG_RCU_CPU_STALL_TIMEOUT 55 56 Inspection suffices, ignore. 57 58 CONFIG_RCU_STALL_COMMON 59 60 Implied by TREE_RCU and PREEMPT_RCU. 61 62 CONFIG_RCU_TORTURE_TEST 63 CONFIG_RCU_TORTURE_TEST_RUNNABLE 64 65 Always used in KVM testing. 66 67 CONFIG_PREEMPT_RCU 68 CONFIG_TREE_RCU 69 CONFIG_TINY_RCU 70 CONFIG_TASKS_RCU 71 72 These are controlled by CONFIG_PREEMPT and/or CONFIG_SMP. 73 74 75 boot parameters ignored: TBD
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