Peter Zijlstra e914985897 locking/lockdep/selftests: Add mixed read-write ABBA tests ...

Currently lockdep has limited support for recursive readers, add a few
mixed read-write ABBA selftests to show the extend of these
limitations.

  [    0.000000] ----------------------------------------------------------------------------
  [    0.000000]                                  | spin |wlock |rlock |mutex | wsem | rsem |
  [    0.000000]   --------------------------------------------------------------------------

  [    0.000000]   mixed read-lock/lock-write ABBA:             |FAILED|             |  ok  |
  [    0.000000]    mixed read-lock/lock-read ABBA:             |  ok  |             |  ok  |
  [    0.000000]  mixed write-lock/lock-write ABBA:             |  ok  |             |  ok  |

This clearly illustrates the case where lockdep fails to find a
deadlock.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boqun.feng@gmail.com
Cc: byungchul.park@lge.com
Cc: david@fromorbit.com
Cc: johannes@sipsolutions.net
Cc: oleg@redhat.com
Cc: tj@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2017-08-25 11:06:31 +02:00

..

842

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2016-03-17 21:38:27 -07:00

fonts

lib/fonts/Kconfig: keep non-Sparc fonts listed together

2017-02-27 18:43:46 -08:00

lz4

lib/lz4: remove back-compat wrappers

2017-02-24 17:46:57 -08:00

lzo

lzo: check for length overrun in variable length encoding.

2014-09-28 11:08:01 +02:00

mpi

mpi: Fix NULL ptr dereference in mpi_powm() [ver #3]

2016-11-25 12:57:50 +11:00

raid6

lib/raid6: Add log-of-2 table for RAID6 HW requiring disk position

2017-05-16 10:01:57 +05:30

reed_solomon

…

xz

…

zlib_deflate

zlib_deflate/deftree: remove bi_reverse()

2015-09-10 13:29:01 -07:00

zlib_inflate

lib/zlib_inflate/inftrees.c: fix potential buffer overflow

2017-05-08 17:15:12 -07:00

.gitignore

…

argv_split.c

…

asn1_decoder.c

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2016-05-17 09:33:39 -07:00

assoc_array.c

assoc_array: don't call compare_object() on a node

2016-04-06 14:06:48 +01:00

atomic64_test.c

lib/atomic64_test.c: add a test that atomic64_inc_not_zero() returns an int

2017-07-14 15:05:13 -07:00

atomic64.c

locking/atomic: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()

2016-06-16 10:48:32 +02:00

audit.c

syscalls: implement execveat() system call

2014-12-13 12:42:51 -08:00

bcd.c

…

bch.c

…

bitmap.c

bitmap: optimise bitmap_set and bitmap_clear of a single bit

2017-07-10 16:32:34 -07:00

bitrev.c

ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction

2014-12-22 16:43:06 +00:00

bsearch.c

lib/bsearch.c: micro-optimize pivot position calculation

2017-07-10 16:32:35 -07:00

btree.c

treewide: Remove old email address

2015-11-23 09:44:58 +01:00

bug.c

debug: Add _ONCE() logic to report_bug()

2017-03-30 09:37:20 +02:00

build_OID_registry

…

bust_spinlocks.c

…

chacha20.c

random: replace non-blocking pool with a Chacha20-based CRNG

2016-07-03 00:57:23 -04:00

check_signature.c

…

checksum.c

ipv4: Update parameters for csum_tcpudp_magic to their original types

2016-03-13 23:55:13 -04:00

clz_ctz.c

…

clz_tab.c

…

cmdline.c

lib/cmdline.c: fix get_options() overflow while parsing ranges

2017-06-23 16:15:55 -07:00

compat_audit.c

…

cordic.c

…

cpu_rmap.c

sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask()

2015-05-27 15:22:15 +02:00

cpumask.c

sched/fair, cpumask: Export for_each_cpu_wrap()

2017-05-15 10:15:23 +02:00

crc4.c

lib: Add crc4 module

2017-06-09 11:52:07 +02:00

crc7.c

…

crc8.c

…

crc16.c

…

crc32.c

lib: add module support to crc32 tests

2017-02-24 17:46:57 -08:00

crc32defs.h

…

crc32test.c

lib: add module support to crc32 tests

2017-02-24 17:46:57 -08:00

crc-ccitt.c

…

crc-itu-t.c

lib: crc-itu-t.[ch] fix 0x0x prefix in integer constants

2015-05-26 15:26:43 +02:00

crc-t10dif.c

lib: introduce crc_t10dif_update()

2015-05-30 22:42:24 -07:00

ctype.c

…

debug_info.c

kbuild: include core debug info when DEBUG_INFO_REDUCED

2015-06-11 15:08:32 +02:00

debug_locks.c

…

debugobjects.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

dec_and_lock.c

…

decompress_bunzip2.c

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10 13:29:01 -07:00

decompress_inflate.c

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10 13:29:01 -07:00

decompress_unlz4.c

lib/decompress_unlz4: change module to work with new LZ4 module version

2017-02-24 17:46:57 -08:00

decompress_unlzma.c

lib/decompress_unlzma: Do a NULL check for pointer

2015-09-10 13:29:01 -07:00

decompress_unlzo.c

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10 13:29:01 -07:00

decompress_unxz.c

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10 13:29:01 -07:00

decompress.c

lib/decompress: set the compressor name to NULL on error

2015-07-17 16:39:54 -07:00

devres.c

devres: fix devm_ioremap_*() offset parameter kerneldoc description

2017-04-24 13:53:13 -05:00

digsig.c

KEYS: Differentiate uses of rcu_dereference_key() and user_key_payload()

2017-03-02 10:09:00 +11:00

div64.c

__div64_32(): make it overridable at compile time

2015-11-16 14:42:12 -05:00

dma-debug.c

Merge tag 'dmaengine-4.12-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2017-05-09 15:40:28 -07:00

dma-noop.c

dma: Take into account dma_pfn_offset

2017-06-28 06:55:01 -07:00

dma-virt.c

dma-virt: remove dma_supported and mapping_error methods

2017-06-28 06:54:41 -07:00

dump_stack.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>

2017-03-02 08:42:34 +01:00

dynamic_debug.c

dynamic_debug: add jump label support

2016-08-04 08:50:07 -04:00

dynamic_queue_limits.c

lib/dynamic_queue_limits.c: simplify includes

2015-02-12 18:54:15 -08:00

earlycpio.c

lib/cpio: Make find_cpio_data()'s offset arg optional

2016-06-08 11:04:19 +02:00

errseq.c

lib: add errseq_t type and infrastructure for handling it

2017-07-06 07:02:24 -04:00

extable.c

lib/extable.c: use bsearch() library function in search_extable()

2017-07-10 16:32:35 -07:00

fault-inject.c

fault-inject: fix wrong should_fail() decision in task context

2017-08-10 15:54:06 -07:00

fdt_empty_tree.c

…

fdt_ro.c

…

fdt_rw.c

…

fdt_strerror.c

…

fdt_sw.c

…

fdt_wip.c

…

fdt.c

…

find_bit.c

lib/find_bit.c: micro-optimise find_next_*_bit

2017-02-24 17:46:57 -08:00

flex_array.c

…

flex_proportions.c

percpu_counter: Rename __percpu_counter_add to percpu_counter_add_batch

2017-06-20 15:42:32 -04:00

gcd.c

lib/GCD.c: use binary GCD algorithm instead of Euclidean

2016-05-20 17:58:30 -07:00

gen_crc32table.c

lib: crc32: constify crc32 lookup table

2015-02-13 21:21:35 -08:00

genalloc.c

lib/genalloc.c: start search from start of chunk

2016-10-27 18:43:43 -07:00

glob.c

lib: add module support to glob tests

2017-02-24 17:46:57 -08:00

globtest.c

lib: add module support to glob tests

2017-02-24 17:46:57 -08:00

hexdump.c

lib/hexdump.c: truncate output in case of overflow

2015-11-06 17:50:42 -08:00

hweight.c

x86/hweight: Get rid of the special calling convention

2016-06-08 15:01:02 +02:00

idr.c

idr: Add missing __rcu annotations

2017-02-13 21:44:10 -05:00

inflate.c

…

int_sqrt.c

…

interval_tree_test.c

lib/interval_tree_test.c: allow full tree search

2017-07-10 16:32:35 -07:00

interval_tree.c

lib/interval_tree.c: simplify includes

2015-02-12 18:54:15 -08:00

iomap_copy.c

lib/iomap_copy.c: add __ioread32_copy()

2016-01-20 17:09:18 -08:00

iomap.c

…

iommu-common.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

2015-11-05 16:34:48 -08:00

iommu-helper.c

lib/iommu-helper: skip to next segment

2016-08-02 19:35:07 -04:00

ioremap.c

mm: convert generic code to 5-level paging

2017-03-09 11:48:47 -08:00

iov_iter.c

Merge branch 'uaccess-work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-07-07 20:39:20 -07:00

irq_poll.c

Merge tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

2016-10-15 10:03:15 -07:00

irq_regs.c

…

is_single_threaded.c

sched/headers: Prepare to move 'init_task' and 'init_thread_union' from <linux/sched.h> to <linux/sched/task.h>

2017-03-02 08:42:38 +01:00

jedec_ddr_data.c

…

kasprintf.c

lib/kasprintf.c: add sanity check to kvasprintf

2016-01-16 11:17:27 -08:00

Kconfig

Merge tag 'libnvdimm-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

2017-07-07 09:44:06 -07:00

Kconfig.debug

Merge branch 'linus' into locking/core, to pick up fixes

2017-08-25 11:04:51 +02:00

Kconfig.kasan

mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB

2016-07-28 16:07:41 -07:00

Kconfig.kgdb

lib: update location of kgdb documentation

2017-05-16 08:44:22 -03:00

Kconfig.kmemcheck

…

Kconfig.ubsan

Kconfig: lib/Kconfig.ubsan fix reference to ubsan documentation

2016-12-14 16:04:08 -08:00

kfifo.c

kfifo: use BUG_ON

2014-08-08 15:57:25 -07:00

klist.c

klist: fix starting point removed bug in klist iterators

2016-02-07 22:18:47 -08:00

kobject_uevent.c

kobject: support passing in variables for synthetic uevents

2017-05-25 18:30:51 +02:00

kobject.c

kobject: Export kobject_get_unless_zero()

2017-03-22 20:11:35 -06:00

kstrtox.c

lib/kstrtox.c: use "unsigned int" more

2017-07-10 16:32:34 -07:00

kstrtox.h

…

lcm.c

block: fix blk_stack_limits() regression due to lcm() change

2015-03-31 09:45:50 -06:00

libcrc32c.c

crypto: Work around deallocated stack frame reference gcc bug on sparc.

2017-06-08 17:36:03 +08:00

list_debug.c

bug: switch data corruption check to __must_check

2017-02-24 17:46:56 -08:00

list_sort.c

lib: add module support to linked list sorting tests

2017-05-08 17:15:10 -07:00

llist.c

lib/llist.c: fix data race in llist_del_first

2015-11-06 17:50:42 -08:00

locking-selftest-hardirq.h

…

locking-selftest-mutex.h

…

locking-selftest-rlock-hardirq.h

…

locking-selftest-rlock-softirq.h

…

locking-selftest-rlock.h

…

locking-selftest-rsem.h

…

locking-selftest-rtmutex.h

locking/selftest: Add RT-mutex support

2017-06-08 10:35:50 +02:00

locking-selftest-softirq.h

…

locking-selftest-spin-hardirq.h

…

locking-selftest-spin-softirq.h

…

locking-selftest-spin.h

…

locking-selftest-wlock-hardirq.h

…

locking-selftest-wlock-softirq.h

…

locking-selftest-wlock.h

…

locking-selftest-wsem.h

…

locking-selftest.c

locking/lockdep/selftests: Add mixed read-write ABBA tests

2017-08-25 11:06:31 +02:00

lockref.c

locking/core: Remove cpu_relax_lowlatency() users

2016-11-16 10:15:10 +01:00

lru_cache.c

lru_cache: Converted lc_seq_printf_status to return void

2015-11-25 09:22:02 -07:00

Makefile

kmod: add test driver to stress test the module loader

2017-07-14 15:05:13 -07:00

memory-notifier-error-inject.c

…

memweight.c

…

net_utils.c

mac_pton: Use bool not int return

2014-06-25 17:45:43 -07:00

netdev-notifier-error-inject.c

net: Add support for CHANGEUPPER notifier error injection

2015-12-03 11:49:23 -05:00

nlattr.c

net: manual clean code which call skb_put_[data:zero]

2017-06-20 13:30:15 -04:00

nmi_backtrace.c

printk: Use the main logbuf in NMI when logbuf_lock is available

2017-05-19 14:42:19 +02:00

nodemask.c

include/linux/nodemask.h: create next_node_in() helper

2016-05-19 19:12:14 -07:00

notifier-error-inject.c

…

notifier-error-inject.h

…

of-reconfig-notifier-error-inject.c

…

oid_registry.c

…

once.c

once: make helper generic for calling functions once

2015-10-08 05:26:36 -07:00

parman.c

lib: Introduce priority array area manager

2017-02-03 16:35:42 -05:00

parser.c

parser: add u64 number parser

2016-12-06 10:17:03 +02:00

pci_iomap.c

Merge tag 'libnvdimm-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

2015-09-08 14:35:59 -07:00

percpu_counter.c

writeback: rework wb_[dec|inc]_stat family of functions

2017-07-12 16:26:05 -07:00

percpu_ida.c

sched/headers: Prepare to remove the <linux/gfp.h> include from <linux/sched.h>

2017-03-02 08:42:34 +01:00

percpu_test.c

…

percpu-refcount.c

percpu-refcount: support synchronous switch to atomic mode.

2017-03-22 19:18:43 -07:00

plist.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>

2017-03-02 08:42:27 +01:00

pm-notifier-error-inject.c

…

prime_numbers.c

lib/prime_numbers: Suppress warn on kmalloc failure

2017-01-23 09:17:12 +01:00

radix-tree.c

lockdep: allow to disable reclaim lockup detection

2017-05-03 15:52:09 -07:00

random32.c

Merge tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

2016-10-15 10:03:15 -07:00

ratelimit.c

ratelimit: extend to print suppressed messages on release

2016-08-02 19:35:06 -04:00

rational.c

…

rbtree_test.c

…

rbtree.c

rbtree: use designated initializers

2017-02-24 17:46:57 -08:00

reciprocal_div.c

…

refcount.c

locking/refcount: Create unchecked atomic_t implementation

2017-06-28 18:54:46 +02:00

rhashtable.c

Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random

2017-07-15 12:44:02 -07:00

sbitmap.c

sbitmap: add sbitmap_get_shallow() operation

2017-04-14 14:06:52 -06:00

scatterlist.c

scatterlist: add sg_zero_buffer() helper

2017-06-15 14:30:14 +02:00

seq_buf.c

tracing: Use seq_buf_used() in seq_buf_to_user() instead of len

2015-12-23 14:27:20 -05:00

sg_pool.c

lib: scatterlist: move SG pool code from SCSI driver to lib/sg_pool.c

2016-04-15 16:53:14 -04:00

sg_split.c

lib: scatterlist: add sg splitting function

2015-08-24 14:28:01 -06:00

sha1.c

lib: EXPORT_SYMBOL sha_init

2015-03-23 22:12:08 -04:00

show_mem.c

lib/show_mem.c: teach show_mem to work with the given nodemask

2017-02-22 16:41:30 -08:00

siphash.c

siphash: implement HalfSipHash1-3 for hash tables

2017-01-09 13:58:57 -05:00

smp_processor_id.c

sched/core: Enable might_sleep() and smp_processor_id() checks early

2017-05-23 10:01:38 +02:00

sort.c

lib: add CONFIG_TEST_SORT to enable self-test of sort()

2017-02-24 17:46:57 -08:00

stackdepot.c

lib/stackdepot: export save/fetch stack for drivers

2016-11-11 08:12:37 -08:00

stmp_device.c

lib/stmp_device.c: replace module.h include

2015-02-12 18:54:16 -08:00

string_helpers.c

string_helpers: add kstrdup_quotable_file

2016-04-21 10:47:26 +10:00

string.c

include/linux/string.h: add the option of fortified string.h functions

2017-07-12 16:26:03 -07:00

strncpy_from_user.c

lib: harden strncpy_from_user

2016-10-11 15:06:30 -07:00

strnlen_user.c

kill strlen_user()

2017-05-15 23:40:22 -04:00

swiotlb.c

swiotlb: ensure that page-sized mappings are page-aligned

2017-01-15 12:37:24 -05:00

syscall.c

lib/syscall: Clear return values when no stack

2017-03-24 07:43:35 +01:00

test_bitmap.c

bitmap: optimise bitmap_set and bitmap_clear of a single bit

2017-07-10 16:32:34 -07:00

test_bpf.c

net: introduce __skb_put_[zero, data, u8]

2017-06-20 13:30:14 -04:00

test_firmware.c

test_firmware: add test custom fallback trigger

2017-01-25 11:52:34 +01:00

test_hash.c

lib/test_hash.c: fix warning in preprocessor symbol evaluation

2016-09-01 17:52:01 -07:00

test_hexdump.c

test_hexdump: print statistics at the end

2016-01-20 17:09:18 -08:00

test_kasan.c

kasan: report only the first error by default

2017-03-31 17:13:30 -07:00

test_kmod.c

test_kmod: fix small memory leak on filesystem tests

2017-08-10 15:54:06 -07:00

test_list_sort.c

lib: add module support to linked list sorting tests

2017-05-08 17:15:10 -07:00

test_module.c

…

test_parman.c

lib: fix spelling mistake: "actualy" -> "actually"

2017-02-26 11:03:38 -05:00

test_printf.c

mm, printk: introduce new format string for flags

2016-03-15 16:55:16 -07:00

test_rhashtable.c

lib: test_rhashtable: Fix KASAN warning

2017-07-25 12:35:23 -07:00

test_siphash.c

siphash: implement HalfSipHash1-3 for hash tables

2017-01-09 13:58:57 -05:00

test_sort.c

Revert "lib/test_sort.c: make it explicitly non-modular"

2017-05-08 17:15:10 -07:00

test_static_key_base.c

locking/static_keys: Provide a selftest

2015-08-03 11:51:12 +02:00

test_static_keys.c

locking/static_keys: Avoid nested functions

2016-02-09 10:27:29 +01:00

test_sysctl.c

test_sysctl: test against int proc_dointvec() array support

2017-07-12 16:26:00 -07:00

test_user_copy.c

lib: remove check for AVR32 arch in test_user_copy

2017-05-01 09:36:30 +02:00

test_uuid.c

uuid: fix incorrect uuid_equal conversion in test_uuid_test

2017-07-21 09:38:30 +02:00

test-kstrtox.c

kstrto*: accept "-0" for signed conversion

2015-09-10 13:29:01 -07:00

test-string_helpers.c

lib/test-string_helpers.c: fix and improve string_get_size() tests

2016-02-03 08:28:43 -08:00

textsearch.c

lib/textsearch.c: remove textsearch_put reference from comments

2014-10-14 02:18:14 +02:00

timerqueue.c

timerqueue: Use rb_entry_safe() instead of open-coding it

2017-01-20 08:03:42 +01:00

ts_bm.c

…

ts_fsm.c

…

ts_kmp.c

…

ubsan.c

UBSAN: fix typo in format string

2016-08-02 17:31:41 -04:00

ubsan.h

UBSAN: run-time undefined behavior sanity checker

2016-01-20 17:09:18 -08:00

ucs2_string.c

lib/ucs2_string: Speed up ucs2_utf8size()

2016-09-09 16:08:46 +01:00

usercopy.c

copy_{from,to}_user(): move kasan checks and might_fault() out-of-line

2017-06-29 22:21:20 -04:00

uuid.c

uuid: hoist uuid_is_null() helper from libnvdimm

2017-06-05 16:59:05 +02:00

vsprintf.c

Merge tag 'devicetree-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

2017-07-07 10:37:54 -07:00

win_minmax.c

lib/win_minmax: windowed min or max estimator

2016-09-21 00:22:59 -04:00