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[PATCH] lockdep: locking API self tests
Introduce DEBUG_LOCKING_API_SELFTESTS, which uses the generic lock debugging
code's silent-failure feature to run a matrix of testcases. There are 210
testcases currently:
+-----------------------
| Locking API testsuite:
+------------------------------+------+------+------+------+------+------+
| spin |wlock |rlock |mutex | wsem | rsem |
-------------------------------+------+------+------+------+------+------+
A-A deadlock: ok | ok | ok | ok | ok | ok |
A-B-B-A deadlock: ok | ok | ok | ok | ok | ok |
A-B-B-C-C-A deadlock: ok | ok | ok | ok | ok | ok |
A-B-C-A-B-C deadlock: ok | ok | ok | ok | ok | ok |
A-B-B-C-C-D-D-A deadlock: ok | ok | ok | ok | ok | ok |
A-B-C-D-B-D-D-A deadlock: ok | ok | ok | ok | ok | ok |
A-B-C-D-B-C-D-A deadlock: ok | ok | ok | ok | ok | ok |
double unlock: ok | ok | ok | ok | ok | ok |
bad unlock order: ok | ok | ok | ok | ok | ok |
--------------------------------------+------+------+------+------+------+
recursive read-lock: | ok | | ok |
--------------------------------------+------+------+------+------+------+
non-nested unlock: ok | ok | ok | ok |
--------------------------------------+------+------+------+
hard-irqs-on + irq-safe-A/12: ok | ok | ok |
soft-irqs-on + irq-safe-A/12: ok | ok | ok |
hard-irqs-on + irq-safe-A/21: ok | ok | ok |
soft-irqs-on + irq-safe-A/21: ok | ok | ok |
sirq-safe-A => hirqs-on/12: ok | ok | ok |
sirq-safe-A => hirqs-on/21: ok | ok | ok |
hard-safe-A + irqs-on/12: ok | ok | ok |
soft-safe-A + irqs-on/12: ok | ok | ok |
hard-safe-A + irqs-on/21: ok | ok | ok |
soft-safe-A + irqs-on/21: ok | ok | ok |
hard-safe-A + unsafe-B #1/123: ok | ok | ok |
soft-safe-A + unsafe-B #1/123: ok | ok | ok |
hard-safe-A + unsafe-B #1/132: ok | ok | ok |
soft-safe-A + unsafe-B #1/132: ok | ok | ok |
hard-safe-A + unsafe-B #1/213: ok | ok | ok |
soft-safe-A + unsafe-B #1/213: ok | ok | ok |
hard-safe-A + unsafe-B #1/231: ok | ok | ok |
soft-safe-A + unsafe-B #1/231: ok | ok | ok |
hard-safe-A + unsafe-B #1/312: ok | ok | ok |
soft-safe-A + unsafe-B #1/312: ok | ok | ok |
hard-safe-A + unsafe-B #1/321: ok | ok | ok |
soft-safe-A + unsafe-B #1/321: ok | ok | ok |
hard-safe-A + unsafe-B #2/123: ok | ok | ok |
soft-safe-A + unsafe-B #2/123: ok | ok | ok |
hard-safe-A + unsafe-B #2/132: ok | ok | ok |
soft-safe-A + unsafe-B #2/132: ok | ok | ok |
hard-safe-A + unsafe-B #2/213: ok | ok | ok |
soft-safe-A + unsafe-B #2/213: ok | ok | ok |
hard-safe-A + unsafe-B #2/231: ok | ok | ok |
soft-safe-A + unsafe-B #2/231: ok | ok | ok |
hard-safe-A + unsafe-B #2/312: ok | ok | ok |
soft-safe-A + unsafe-B #2/312: ok | ok | ok |
hard-safe-A + unsafe-B #2/321: ok | ok | ok |
soft-safe-A + unsafe-B #2/321: ok | ok | ok |
hard-irq lock-inversion/123: ok | ok | ok |
soft-irq lock-inversion/123: ok | ok | ok |
hard-irq lock-inversion/132: ok | ok | ok |
soft-irq lock-inversion/132: ok | ok | ok |
hard-irq lock-inversion/213: ok | ok | ok |
soft-irq lock-inversion/213: ok | ok | ok |
hard-irq lock-inversion/231: ok | ok | ok |
soft-irq lock-inversion/231: ok | ok | ok |
hard-irq lock-inversion/312: ok | ok | ok |
soft-irq lock-inversion/312: ok | ok | ok |
hard-irq lock-inversion/321: ok | ok | ok |
soft-irq lock-inversion/321: ok | ok | ok |
hard-irq read-recursion/123: ok |
soft-irq read-recursion/123: ok |
hard-irq read-recursion/132: ok |
soft-irq read-recursion/132: ok |
hard-irq read-recursion/213: ok |
soft-irq read-recursion/213: ok |
hard-irq read-recursion/231: ok |
soft-irq read-recursion/231: ok |
hard-irq read-recursion/312: ok |
soft-irq read-recursion/312: ok |
hard-irq read-recursion/321: ok |
soft-irq read-recursion/321: ok |
--------------------------------+-----+----------------
Good, all 210 testcases passed! |
--------------------------------+
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar
Linus Torvalds
parent
1f194a4c39
commit
cae2ed9aa5
18 changed files with 1347 additions and 0 deletions
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@ -435,6 +435,15 @@ running once the system is up.
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debug [KNL] Enable kernel debugging (events log level).
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debug [KNL] Enable kernel debugging (events log level).
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debug_locks_verbose=
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[KNL] verbose self-tests
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Format=<0|1>
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Print debugging info while doing the locking API
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self-tests.
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We default to 0 (no extra messages), setting it to
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1 will print _a lot_ more information - normally
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only useful to kernel developers.
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decnet= [HW,NET]
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decnet= [HW,NET]
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Format: <area>[,<node>]
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Format: <area>[,<node>]
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See also Documentation/networking/decnet.txt.
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See also Documentation/networking/decnet.txt.
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@ -149,6 +149,17 @@ config DEBUG_SPINLOCK_SLEEP
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If you say Y here, various routines which may sleep will become very
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If you say Y here, various routines which may sleep will become very
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noisy if they are called with a spinlock held.
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noisy if they are called with a spinlock held.
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config DEBUG_LOCKING_API_SELFTESTS
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bool "Locking API boot-time self-tests"
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depends on DEBUG_KERNEL
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help
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Say Y here if you want the kernel to run a short self-test during
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bootup. The self-test checks whether common types of locking bugs
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are detected by debugging mechanisms or not. (if you disable
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lock debugging then those bugs wont be detected of course.)
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The following locking APIs are covered: spinlocks, rwlocks,
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mutexes and rwsems.
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config STACKTRACE
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config STACKTRACE
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bool
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bool
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depends on STACKTRACE_SUPPORT
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depends on STACKTRACE_SUPPORT
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@ -18,6 +18,7 @@ CFLAGS_kobject.o += -DDEBUG
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CFLAGS_kobject_uevent.o += -DDEBUG
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CFLAGS_kobject_uevent.o += -DDEBUG
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endif
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endif
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obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
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obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o
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obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o
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lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
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lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
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lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
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lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
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9
lib/locking-selftest-hardirq.h
Normal file
9
lib/locking-selftest-hardirq.h
Normal file
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@ -0,0 +1,9 @@
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#undef IRQ_DISABLE
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#undef IRQ_ENABLE
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#undef IRQ_ENTER
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#undef IRQ_EXIT
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#define IRQ_ENABLE HARDIRQ_ENABLE
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#define IRQ_DISABLE HARDIRQ_DISABLE
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#define IRQ_ENTER HARDIRQ_ENTER
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#define IRQ_EXIT HARDIRQ_EXIT
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11
lib/locking-selftest-mutex.h
Normal file
11
lib/locking-selftest-mutex.h
Normal file
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@ -0,0 +1,11 @@
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#undef LOCK
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#define LOCK ML
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#undef UNLOCK
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#define UNLOCK MU
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#undef RLOCK
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#undef WLOCK
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#undef INIT
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#define INIT MI
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2
lib/locking-selftest-rlock-hardirq.h
Normal file
2
lib/locking-selftest-rlock-hardirq.h
Normal file
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@ -0,0 +1,2 @@
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#include "locking-selftest-rlock.h"
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#include "locking-selftest-hardirq.h"
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2
lib/locking-selftest-rlock-softirq.h
Normal file
2
lib/locking-selftest-rlock-softirq.h
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@ -0,0 +1,2 @@
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#include "locking-selftest-rlock.h"
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#include "locking-selftest-softirq.h"
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14
lib/locking-selftest-rlock.h
Normal file
14
lib/locking-selftest-rlock.h
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@ -0,0 +1,14 @@
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#undef LOCK
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#define LOCK RL
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#undef UNLOCK
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#define UNLOCK RU
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#undef RLOCK
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#define RLOCK RL
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#undef WLOCK
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#define WLOCK WL
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#undef INIT
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#define INIT RWI
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14
lib/locking-selftest-rsem.h
Normal file
14
lib/locking-selftest-rsem.h
Normal file
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@ -0,0 +1,14 @@
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#undef LOCK
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#define LOCK RSL
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#undef UNLOCK
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#define UNLOCK RSU
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#undef RLOCK
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#define RLOCK RSL
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#undef WLOCK
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#define WLOCK WSL
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#undef INIT
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#define INIT RWSI
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9
lib/locking-selftest-softirq.h
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9
lib/locking-selftest-softirq.h
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@ -0,0 +1,9 @@
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#undef IRQ_DISABLE
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#undef IRQ_ENABLE
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#undef IRQ_ENTER
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#undef IRQ_EXIT
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#define IRQ_DISABLE SOFTIRQ_DISABLE
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#define IRQ_ENABLE SOFTIRQ_ENABLE
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#define IRQ_ENTER SOFTIRQ_ENTER
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#define IRQ_EXIT SOFTIRQ_EXIT
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2
lib/locking-selftest-spin-hardirq.h
Normal file
2
lib/locking-selftest-spin-hardirq.h
Normal file
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@ -0,0 +1,2 @@
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#include "locking-selftest-spin.h"
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#include "locking-selftest-hardirq.h"
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2
lib/locking-selftest-spin-softirq.h
Normal file
2
lib/locking-selftest-spin-softirq.h
Normal file
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@ -0,0 +1,2 @@
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#include "locking-selftest-spin.h"
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#include "locking-selftest-softirq.h"
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11
lib/locking-selftest-spin.h
Normal file
11
lib/locking-selftest-spin.h
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@ -0,0 +1,11 @@
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#undef LOCK
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#define LOCK L
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#undef UNLOCK
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#define UNLOCK U
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#undef RLOCK
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#undef WLOCK
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#undef INIT
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#define INIT SI
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2
lib/locking-selftest-wlock-hardirq.h
Normal file
2
lib/locking-selftest-wlock-hardirq.h
Normal file
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@ -0,0 +1,2 @@
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#include "locking-selftest-wlock.h"
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#include "locking-selftest-hardirq.h"
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2
lib/locking-selftest-wlock-softirq.h
Normal file
2
lib/locking-selftest-wlock-softirq.h
Normal file
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@ -0,0 +1,2 @@
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#include "locking-selftest-wlock.h"
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#include "locking-selftest-softirq.h"
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14
lib/locking-selftest-wlock.h
Normal file
14
lib/locking-selftest-wlock.h
Normal file
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@ -0,0 +1,14 @@
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#undef LOCK
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#define LOCK WL
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#undef UNLOCK
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#define UNLOCK WU
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#undef RLOCK
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#define RLOCK RL
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#undef WLOCK
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#define WLOCK WL
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#undef INIT
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#define INIT RWI
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14
lib/locking-selftest-wsem.h
Normal file
14
lib/locking-selftest-wsem.h
Normal file
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@ -0,0 +1,14 @@
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#undef LOCK
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#define LOCK WSL
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#undef UNLOCK
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#define UNLOCK WSU
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#undef RLOCK
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#define RLOCK RSL
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#undef WLOCK
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#define WLOCK WSL
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#undef INIT
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#define INIT RWSI
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1218
lib/locking-selftest.c
Normal file
1218
lib/locking-selftest.c
Normal file
File diff suppressed because it is too large
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