95 lines
2.9 KiB
Plaintext
95 lines
2.9 KiB
Plaintext
This document gives a brief rationale for the TREE_RCU-related test
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cases, a group that includes TREE_PREEMPT_RCU.
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Kconfig Parameters:
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CONFIG_DEBUG_LOCK_ALLOC -- Do three, covering CONFIG_PROVE_LOCKING & not.
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CONFIG_DEBUG_OBJECTS_RCU_HEAD -- Do one.
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CONFIG_HOTPLUG_CPU -- Do half. (Every second.)
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CONFIG_HZ_PERIODIC -- Do one.
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CONFIG_NO_HZ_IDLE -- Do those not otherwise specified. (Groups of two.)
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CONFIG_NO_HZ_FULL -- Do two, one with CONFIG_NO_HZ_FULL_SYSIDLE.
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CONFIG_NO_HZ_FULL_SYSIDLE -- Do one.
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CONFIG_PREEMPT -- Do half. (First three and #8.)
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CONFIG_PROVE_LOCKING -- Do all but two, covering CONFIG_PROVE_RCU and not.
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CONFIG_PROVE_RCU -- Do all but one under CONFIG_PROVE_LOCKING.
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CONFIG_RCU_BOOST -- one of TREE_PREEMPT_RCU.
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CONFIG_RCU_BOOST_PRIO -- set to 2 for _BOOST testing.
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CONFIG_RCU_CPU_STALL_INFO -- do one with and without _VERBOSE.
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CONFIG_RCU_CPU_STALL_VERBOSE -- do one with and without _INFO.
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CONFIG_RCU_FANOUT -- Cover hierarchy as currently, but overlap with others.
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CONFIG_RCU_FANOUT_EXACT -- Do one.
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CONFIG_RCU_FANOUT_LEAF -- Do one non-default.
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CONFIG_RCU_FAST_NO_HZ -- Do one, but not with CONFIG_RCU_NOCB_CPU_ALL.
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CONFIG_RCU_NOCB_CPU -- Do three, see below.
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CONFIG_RCU_NOCB_CPU_ALL -- Do one.
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CONFIG_RCU_NOCB_CPU_NONE -- Do one.
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CONFIG_RCU_NOCB_CPU_ZERO -- Do one.
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CONFIG_RCU_TRACE -- Do half.
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CONFIG_SMP -- Need one !SMP for TREE_PREEMPT_RCU.
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RCU-bh: Do one with PREEMPT and one with !PREEMPT.
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RCU-sched: Do one with PREEMPT but not BOOST.
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Hierarchy:
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TREE01. CONFIG_NR_CPUS=8, CONFIG_RCU_FANOUT=8, CONFIG_RCU_FANOUT_EXACT=n.
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TREE02. CONFIG_NR_CPUS=8, CONFIG_RCU_FANOUT=3, CONFIG_RCU_FANOUT_EXACT=n,
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CONFIG_RCU_FANOUT_LEAF=3.
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TREE03. CONFIG_NR_CPUS=8, CONFIG_RCU_FANOUT=4, CONFIG_RCU_FANOUT_EXACT=n,
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CONFIG_RCU_FANOUT_LEAF=4.
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TREE04. CONFIG_NR_CPUS=8, CONFIG_RCU_FANOUT=2, CONFIG_RCU_FANOUT_EXACT=n,
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CONFIG_RCU_FANOUT_LEAF=2.
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TREE05. CONFIG_NR_CPUS=8, CONFIG_RCU_FANOUT=6, CONFIG_RCU_FANOUT_EXACT=n
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CONFIG_RCU_FANOUT_LEAF=6.
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TREE06. CONFIG_NR_CPUS=8, CONFIG_RCU_FANOUT=6, CONFIG_RCU_FANOUT_EXACT=y
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CONFIG_RCU_FANOUT_LEAF=6.
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TREE07. CONFIG_NR_CPUS=16, CONFIG_RCU_FANOUT=2, CONFIG_RCU_FANOUT_EXACT=n,
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CONFIG_RCU_FANOUT_LEAF=2.
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TREE08. CONFIG_NR_CPUS=16, CONFIG_RCU_FANOUT=3, CONFIG_RCU_FANOUT_EXACT=y,
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CONFIG_RCU_FANOUT_LEAF=2.
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TREE09. CONFIG_NR_CPUS=1.
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Kconfig Parameters Ignored:
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CONFIG_64BIT
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Used only to check CONFIG_RCU_FANOUT value, inspection suffices.
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CONFIG_NO_HZ_FULL_SYSIDLE_SMALL
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Defer until Frederic uses this.
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CONFIG_PREEMPT_COUNT
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CONFIG_PREEMPT_RCU
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Redundant with CONFIG_PREEMPT, ignore.
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CONFIG_RCU_BOOST_DELAY
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Inspection suffices, ignore.
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CONFIG_RCU_CPU_STALL_TIMEOUT
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Inspection suffices, ignore.
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CONFIG_RCU_STALL_COMMON
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Implied by TREE_RCU and TREE_PREEMPT_RCU.
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CONFIG_RCU_TORTURE_TEST
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CONFIG_RCU_TORTURE_TEST_RUNNABLE
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Always used in KVM testing.
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CONFIG_RCU_USER_QS
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Redundant with CONFIG_NO_HZ_FULL.
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CONFIG_TREE_PREEMPT_RCU
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CONFIG_TREE_RCU
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These are controlled by CONFIG_PREEMPT.
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