linux-toradex.git/lib/locking-selftest.c, branch v5.12-rc6

locking/selftests: Add local_lock inversion tests

2021-01-14T10:20:18+00:00

Test the local_lock_t inversion scenarios.

Signed-off-by: Peter Zijlstra (Intel)

locking/selftests: More granular debug_locks_verbose

2021-01-14T10:20:16+00:00

Showing all tests all the time is tiresome.

Signed-off-by: Peter Zijlstra (Intel)

lockdep/selftest: Add wait context selftests

2021-01-14T10:20:16+00:00

These tests are added for two purposes:

*	Test the implementation of wait context checks and related
	annotations.

*	Semi-document the rules for wait context nesting when
	PROVE_RAW_LOCK_NESTING=y.

The test cases are only avaible for PROVE_RAW_LOCK_NESTING=y, as wait
context checking makes more sense for that configuration.

Signed-off-by: Boqun Feng 
Signed-off-by: Peter Zijlstra (Intel) 
Link: https://lkml.kernel.org/r/20201208103112.2838119-5-boqun.feng@gmail.com

Merge branch 'akpm' (patches from Andrew)

2020-12-15T20:53:37+00:00

Merge misc updates from Andrew Morton:

 - a few random little subsystems

 - almost all of the MM patches which are staged ahead of linux-next
   material. I'll trickle to post-linux-next work in as the dependents
   get merged up.

Subsystems affected by this patch series: kthread, kbuild, ide, ntfs,
ocfs2, arch, and mm (slab-generic, slab, slub, dax, debug, pagecache,
gup, swap, shmem, memcg, pagemap, mremap, hmm, vmalloc, documentation,
kasan, pagealloc, memory-failure, hugetlb, vmscan, z3fold, compaction,
oom-kill, migration, cma, page-poison, userfaultfd, zswap, zsmalloc,
uaccess, zram, and cleanups).

* emailed patches from Andrew Morton : (200 commits)
  mm: cleanup kstrto*() usage
  mm: fix fall-through warnings for Clang
  mm: slub: convert sysfs sprintf family to sysfs_emit/sysfs_emit_at
  mm: shmem: convert shmem_enabled_show to use sysfs_emit_at
  mm:backing-dev: use sysfs_emit in macro defining functions
  mm: huge_memory: convert remaining use of sprintf to sysfs_emit and neatening
  mm: use sysfs_emit for struct kobject * uses
  mm: fix kernel-doc markups
  zram: break the strict dependency from lzo
  zram: add stat to gather incompressible pages since zram set up
  zram: support page writeback
  mm/process_vm_access: remove redundant initialization of iov_r
  mm/zsmalloc.c: rework the list_add code in insert_zspage()
  mm/zswap: move to use crypto_acomp API for hardware acceleration
  mm/zswap: fix passing zero to 'PTR_ERR' warning
  mm/zswap: make struct kernel_param_ops definitions const
  userfaultfd/selftests: hint the test runner on required privilege
  userfaultfd/selftests: fix retval check for userfaultfd_open()
  userfaultfd/selftests: always dump something in modes
  userfaultfd: selftests: make __{s,u}64 format specifiers portable
  ...

locking/selftests: add testcases for fs_reclaim

2020-12-15T20:13:41+00:00

Since I butchered this I figured better to make sure we have testcases for
this now.  Since we only have a locking context for __GFP_FS that's the
only thing we're testing right now.

Link: https://lkml.kernel.org/r/20201125162532.1299794-4-daniel.vetter@ffwll.ch
Signed-off-by: Daniel Vetter 
Acked-by: Peter Zijlstra (Intel) 
Cc: Dave Chinner 
Cc: Qian Cai 
Cc: Thomas Hellström (Intel) 
Cc: Jason Gunthorpe 
Cc: Maarten Lankhorst 
Cc: Christian König 
Cc: "Matthew Wilcox (Oracle)" 
Cc: Peter Zijlstra 
Cc: Ingo Molnar 
Cc: Will Deacon 
Cc: Christoph Lameter 
Cc: David Rientjes 
Cc: Ingo Molnar 
Cc: Jason Gunthorpe 
Cc: Joonsoo Kim 
Cc: Mathieu Desnoyers 
Cc: Michel Lespinasse 
Cc: Paul E. McKenney 
Cc: Pekka Enberg 
Cc: Randy Dunlap 
Cc: Sebastian Andrzej Siewior 
Cc: Thomas Gleixner 
Cc: Vlastimil Babka 
Cc: Waiman Long 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

lockdep/selftest: Add spin_nest_lock test

2020-12-03T10:20:50+00:00

Add a self test case to test the behavior for the following case:

	lock(A);
	lock_nest_lock(C1, A);
	lock(B);
	lock_nest_lock(C2, A);

This is a reproducer for a problem[1] reported by Chris Wilson, and is
helpful to prevent this.

[1]: https://lore.kernel.org/lkml/160390684819.31966.12048967113267928793@build.alporthouse.com/

Signed-off-by: Boqun Feng 
Signed-off-by: Peter Zijlstra (Intel) 
Link: https://lkml.kernel.org/r/20201102053743.450459-2-boqun.feng@gmail.com

lockdep/selftests: Fix PROVE_RAW_LOCK_NESTING

2020-12-03T10:20:50+00:00

The selftest nests rwlock_t inside raw_spinlock_t, this is invalid.

Reported-by: Boqun Feng 
Signed-off-by: Peter Zijlstra (Intel)

lockdep/selftest: Introduce recursion3

2020-08-26T10:42:08+00:00

Add a test case shows that USED_IN_*_READ and ENABLE_*_READ can cause
deadlock too.

Signed-off-by: Boqun Feng 
Signed-off-by: Peter Zijlstra (Intel) 
Link: https://lkml.kernel.org/r/20200807074238.1632519-20-boqun.feng@gmail.com

locking/selftest: Add test cases for queued_read_lock()

2020-08-26T10:42:07+00:00

Add two self test cases for the following case:

	P0:			P1:			P2:

				
	spin_lock_irq(&slock)	read_lock(&rwlock)
							write_lock_irq(&rwlock)
	read_lock(&rwlock)	spin_lock(&slock)

, which is a deadlock, as the read_lock() on P0 cannot get the lock
because of the fairness.

	P0:			P1:			P2:

	
	spin_lock(&slock)	read_lock(&rwlock)
							write_lock(&rwlock)
	read_lock(&rwlock)	spin_lock_irq(&slock)

, which is not a deadlock, as the read_lock() on P0 can get the lock
because it could use the unfair fastpass.

Signed-off-by: Boqun Feng 
Signed-off-by: Peter Zijlstra (Intel) 
Link: https://lkml.kernel.org/r/20200807074238.1632519-19-boqun.feng@gmail.com

Revert "locking/lockdep/selftests: Fix mixed read-write ABBA tests"

2020-08-26T10:42:07+00:00

This reverts commit d82fed75294229abc9d757f08a4817febae6c4f4.

Since we now could handle mixed read-write deadlock detection well, the
self tests could be detected as expected, no need to use this
work-around.

Signed-off-by: Boqun Feng 
Signed-off-by: Peter Zijlstra (Intel) 
Link: https://lkml.kernel.org/r/20200807074238.1632519-18-boqun.feng@gmail.com