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From: Waiman Long <longman@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
	Boqun Feng <boqun.feng@gmail.com>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	Davidlohr Bueso <dave@stgolabs.net>
Cc: linux-kernel@vger.kernel.org, Juri Lelli <juri.lelli@redhat.com>,
	Waiman Long <longman@redhat.com>
Subject: [PATCH 0/4] locking/ww_mutex: Fix locktorture ww_mutex test problems
Date: Tue, 16 Mar 2021 11:31:15 -0400	[thread overview]
Message-ID: <20210316153119.13802-1-longman@redhat.com> (raw)

It was found that lockdep splat was produced whenever the ww_mutex
locktorture test was run on a kernel with lockdep enabled. It turns out
that there are bugs both in the ww_mutex and the locktorture code. This
patch series fix these bugs so that the ww_mutex locktorture test is
able to run without producing unexpected lockdep splat.

Patches 1 & 2 are clean-up patches for ww_mutex. Patch 3 fixes the lockdep
bug in ww_mutex and patch 4 fixes a bug in the locktorture code.

Waiman Long (4):
  locking/ww_mutex: Simplify use_ww_ctx & ww_ctx handling
  locking/ww_mutex: Fix acquire/release imbalance in
    ww_acquire_init()/ww_acquire_fini()
  locking/ww_mutex: Treat ww_mutex_lock() like a trylock
  locking/locktorture: Fix incorrect use of ww_acquire_ctx in ww_mutex
    test

 include/linux/ww_mutex.h     |  5 ++-
 kernel/locking/locktorture.c | 86 +++++++++++++++++++++++-------------
 kernel/locking/mutex.c       | 30 ++++++++-----
 3 files changed, 77 insertions(+), 44 deletions(-)

-- 
2.18.1


             reply	other threads:[~2021-03-16 15:32 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 15:31 Waiman Long [this message]
2021-03-16 15:31 ` [PATCH 1/4] locking/ww_mutex: Simplify use_ww_ctx & ww_ctx handling Waiman Long
2021-03-16 18:55   ` Davidlohr Bueso
2021-03-17 12:38   ` [tip: locking/urgent] " tip-bot2 for Waiman Long
2021-03-17 12:59     ` Peter Zijlstra
2021-03-17 13:43       ` Waiman Long
2021-03-17 13:55         ` Peter Zijlstra
2021-03-17 14:10           ` Waiman Long
2021-03-17 14:17             ` Peter Zijlstra
2021-03-17 14:33             ` Waiman Long
2021-03-16 15:31 ` [PATCH 2/4] locking/ww_mutex: Fix acquire/release imbalance in ww_acquire_init()/ww_acquire_fini() Waiman Long
2021-03-17 12:38   ` [tip: locking/urgent] " tip-bot2 for Waiman Long
2021-03-16 15:31 ` [PATCH 3/4] locking/ww_mutex: Treat ww_mutex_lock() like a trylock Waiman Long
2021-03-17  3:01   ` Davidlohr Bueso
2021-03-17 12:38   ` [tip: locking/urgent] " tip-bot2 for Waiman Long
2021-03-17 13:12     ` Peter Zijlstra
2021-03-17 13:31       ` Peter Zijlstra
2021-03-17 14:03         ` Waiman Long
2021-03-17 15:35           ` Waiman Long
2021-03-17 16:48             ` Peter Zijlstra
2021-03-17 17:40               ` Peter Zijlstra
2021-03-17 17:45                 ` Peter Zijlstra
2021-03-17 18:32                   ` Waiman Long
2021-03-17 19:58                     ` Peter Zijlstra
2021-03-17 20:20                       ` Waiman Long
2021-03-17 18:14                 ` Waiman Long
2021-03-18  2:24   ` [PATCH 3/4] " Boqun Feng
2021-03-18  2:54     ` Waiman Long
2021-03-18  6:36       ` Boqun Feng
2021-03-16 15:31 ` [PATCH 4/4] locking/locktorture: Fix incorrect use of ww_acquire_ctx in ww_mutex test Waiman Long
2021-03-17  5:16   ` Davidlohr Bueso
2021-03-17 13:21     ` Waiman Long

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