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From: Peter Zijlstra <peterz@infradead.org>
To: Byungchul Park <byungchul.park@lge.com>
Cc: mingo@kernel.org, tglx@linutronix.de, walken@google.com,
	boqun.feng@gmail.com, kirill@shutemov.name,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	iamjoonsoo.kim@lge.com, akpm@linux-foundation.org,
	npiggin@gmail.com
Subject: Re: [PATCH v5 06/13] lockdep: Implement crossrelease feature
Date: Thu, 2 Mar 2017 14:41:03 +0100	[thread overview]
Message-ID: <20170302134103.GS6515@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1484745459-2055-7-git-send-email-byungchul.park@lge.com>

On Wed, Jan 18, 2017 at 10:17:32PM +0900, Byungchul Park wrote:
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index a6c8db1..7890661 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1042,6 +1042,19 @@ config DEBUG_LOCK_ALLOC
>  	 spin_lock_init()/mutex_init()/etc., or whether there is any lock
>  	 held during task exit.
>  
> +config LOCKDEP_CROSSRELEASE
> +	bool "Lock debugging: make lockdep work for crosslocks"
> +	select LOCKDEP
> +	select TRACE_IRQFLAGS
> +	default n
> +	help
> +	 This makes lockdep work for crosslock which is a lock allowed to
> +	 be released in a different context from the acquisition context.
> +	 Normally a lock must be released in the context acquiring the lock.
> +	 However, relexing this constraint helps synchronization primitives
> +	 such as page locks or completions can use the lock correctness
> +	 detector, lockdep.
> +
>  config PROVE_LOCKING
>  	bool "Lock debugging: prove locking correctness"
>  	depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT


Does CROSSRELEASE && !PROVE_LOCKING make any sense?

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  parent reply	other threads:[~2017-03-02 13:41 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-18 13:17 [PATCH v5 00/13] lockdep: Implement crossrelease feature Byungchul Park
2017-01-18 13:17 ` [PATCH v5 01/13] lockdep: Refactor lookup_chain_cache() Byungchul Park
2017-01-19  9:16   ` Boqun Feng
2017-01-19  9:52     ` Byungchul Park
2017-01-26  7:53     ` Byungchul Park
2017-01-18 13:17 ` [PATCH v5 02/13] lockdep: Fix wrong condition to print bug msgs for MAX_LOCKDEP_CHAIN_HLOCKS Byungchul Park
2017-01-18 13:17 ` [PATCH v5 03/13] lockdep: Add a function building a chain between two classes Byungchul Park
2017-01-18 13:17 ` [PATCH v5 04/13] lockdep: Refactor save_trace() Byungchul Park
2017-01-18 13:17 ` [PATCH v5 05/13] lockdep: Pass a callback arg to check_prev_add() to handle stack_trace Byungchul Park
2017-01-26  7:43   ` Byungchul Park
2017-01-18 13:17 ` [PATCH v5 06/13] lockdep: Implement crossrelease feature Byungchul Park
2017-02-28 12:26   ` Peter Zijlstra
2017-02-28 12:45   ` Peter Zijlstra
2017-02-28 12:49     ` Peter Zijlstra
2017-03-01  6:20       ` Byungchul Park
2017-02-28 13:05   ` Peter Zijlstra
2017-02-28 13:28     ` Byungchul Park
2017-02-28 13:35       ` Peter Zijlstra
2017-02-28 14:00         ` Byungchul Park
2017-02-28 13:10   ` Peter Zijlstra
2017-02-28 13:24     ` Byungchul Park
2017-02-28 18:29       ` Peter Zijlstra
2017-03-01  4:40         ` Byungchul Park
2017-03-01 10:45           ` Peter Zijlstra
2017-03-01 12:10             ` Byungchul Park
2017-02-28 13:40   ` Peter Zijlstra
2017-03-01  5:43     ` Byungchul Park
2017-03-01 12:28       ` Peter Zijlstra
2017-03-02 13:40         ` Peter Zijlstra
2017-03-03  0:17           ` Byungchul Park
2017-03-03  8:14             ` Peter Zijlstra
2017-03-03  9:13               ` Peter Zijlstra
2017-03-03  9:32                 ` Peter Zijlstra
2017-03-05  3:33                 ` Byungchul Park
2017-03-05  3:08               ` Byungchul Park
2017-03-07 11:42                 ` Peter Zijlstra
2017-03-03  0:39           ` Byungchul Park
2017-02-28 15:49   ` Peter Zijlstra
2017-03-01  5:17     ` Byungchul Park
2017-03-01  6:18       ` Byungchul Park
2017-03-02  2:52       ` Byungchul Park
2017-02-28 18:15   ` Peter Zijlstra
2017-03-01  7:21     ` Byungchul Park
2017-03-01 10:43       ` Peter Zijlstra
2017-03-01 12:27         ` Byungchul Park
2017-03-02  4:20     ` Matthew Wilcox
2017-03-02  4:45       ` byungchul.park
2017-03-02 14:39         ` Matthew Wilcox
2017-03-02 23:50           ` Byungchul Park
2017-03-05  8:01             ` Byungchul Park
2017-03-14  7:36     ` Byungchul Park
2017-03-02 13:41   ` Peter Zijlstra [this message]
2017-03-02 23:43     ` Byungchul Park
2017-01-18 13:17 ` [PATCH v5 07/13] lockdep: Make print_circular_bug() aware of crossrelease Byungchul Park
2017-01-18 13:17 ` [PATCH v5 08/13] lockdep: Apply crossrelease to completions Byungchul Park
2017-01-18 13:17 ` [PATCH v5 09/13] pagemap.h: Remove trailing white space Byungchul Park
2017-01-18 13:17 ` [PATCH v5 10/13] lockdep: Apply crossrelease to PG_locked locks Byungchul Park
2017-01-18 13:17 ` [PATCH v5 11/13] lockdep: Apply lock_acquire(release) on __Set(__Clear)PageLocked Byungchul Park
2017-01-18 13:17 ` [PATCH v5 12/13] lockdep: Move data of CONFIG_LOCKDEP_PAGELOCK from page to page_ext Byungchul Park
2017-01-18 13:17 ` [PATCH v5 13/13] lockdep: Crossrelease feature documentation Byungchul Park
2017-01-20  9:08   ` [REVISED DOCUMENT] " Byungchul Park
2017-02-20  8:38 ` [PATCH v5 00/13] lockdep: Implement crossrelease feature Byungchul Park

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