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Message-ID: <9025e912-7151-4a1e-b1ba-91eafde12179@acm.org>
Date: Fri, 22 Nov 2024 12:18:40 -0800
From: Bart Van Assche <bvanassche@....org>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Will Deacon <will@...nel.org>, Waiman Long <longman@...hat.com>
Cc: linux-kernel@...r.kernel.org
Subject: Unexpected lockdep selftest failures
Hi,
With the for-next branch of this tree: git://git.kernel.dk/linux-block
(commit 12ab2c13ca77 ("Merge branch 'for-6.13/block' into for-next")) I
see the following:
[ 0.887603][ T0]
--------------------------------------------------------------------------
[ 0.888763][ T0] | Wound/wait tests |
[ 0.889310][ T0] ---------------------
[ 0.889867][ T0] ww api failures: ok |FAILED|
ok |
[ 0.892597][ T0] ww contexts mixing: ok | ok |
[ 0.894638][ T0] finishing ww context: ok | ok |
ok | ok |
[ 0.898020][ T0] locking mismatches: ok | ok |
ok |
[ 0.900689][ T0] EDEADLK handling: ok | ok |
ok | ok | ok | ok | ok | ok | ok | ok |
[ 0.908172][ T0] spinlock nest unlocked: ok |
[ 0.909484][ T0] spinlock nest test: ok |
[ 0.910902][ T0]
-----------------------------------------------------
[ 0.911824][ T0] |block | try
|context|
[ 0.912970][ T0]
-----------------------------------------------------
[ 0.913890][ T0] context: ok | ok |
ok |
[ 0.916613][ T0] try: ok | ok |
ok |
[ 0.919235][ T0] block: ok | ok |
ok |
[ 0.921852][ T0] spinlock: ok | ok
|FAILED|
[ 0.924666][ T0]
--------------------------------------------------------------------------
[ 0.925852][ T0] | queued read lock tests |
[ 0.926506][ T0] ---------------------------
[ 0.927132][ T0] hardirq read-lock/lock-read: ok |
[ 0.928496][ T0] hardirq lock-read/read-lock: ok |
[ 0.929860][ T0] hardirq inversion: ok |
[ 0.931269][ T0] --------------------
[ 0.931827][ T0] | fs_reclaim tests |
[ 0.932383][ T0] --------------------
[ 0.932932][ T0] correct nesting: ok |
[ 0.934252][ T0] wrong nesting: ok |
[ 0.935518][ T0] protected nesting: ok |
[ 0.936784][ T0]
--------------------------------------------------------------------------
[ 0.937936][ T0] | wait context tests |
[ 0.938516][ T0]
--------------------------------------------------------------------------
[ 0.939661][ T0] | rcu | raw |
spin |mutex |
[ 0.940646][ T0]
--------------------------------------------------------------------------
[ 0.941798][ T0] in hardirq context: ok | ok |
ok | ok |
[ 0.944946][ T0] in hardirq context (not threaded): ok | ok |
ok | ok |
[ 0.948072][ T0] in softirq context: ok | ok |
ok | ok |
[ 0.951206][ T0] in RCU context: ok | ok |
ok | ok |
[ 0.954345][ T0] in RCU-bh context: ok | ok |
ok | ok |
[ 0.957477][ T0] in RCU-sched context: ok | ok |
ok | ok |
[ 0.960612][ T0] in RAW_SPINLOCK context: ok | ok |
ok | ok |
[ 0.963927][ T0] in SPINLOCK context: ok | ok |
ok | ok |
[ 0.967252][ T0] in MUTEX context: ok | ok |
ok | ok |
[ 0.970571][ T0]
--------------------------------------------------------------------------
[ 0.971702][ T0] | local_lock tests |
[ 0.972422][ T0] ---------------------
[ 0.972965][ T0] local_lock inversion 2: ok |
[ 0.974319][ T0] local_lock inversion 3A: ok |
[ 0.975708][ T0] local_lock inversion 3B: ok |
[ 0.977106][ T0] hardirq_unsafe_softirq_safe: ok |
[ 0.978595][ T0]
--------------------------------------------------------------------------
[ 0.979723][ T0] | lockdep_set_subclass() name test|
[ 0.980424][ T0] -----------------------------------
[ 0.981123][ T0] compare name before and after: ok |
[ 0.982423][ T0]
-----------------------------------------------------------------
[ 0.983434][ T0] BUG: 2 unexpected failures (out of 395) -
debugging disabled! |
[ 0.984441][ T0]
-----------------------------------------------------------------
Is this a known issue?
Thanks,
Bart.
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