From: Byungchul Park <byungchul.park@lge.com>
To: peterz@infradead.org, mingo@kernel.org
Cc: 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, willy@infradead.org,
npiggin@gmail.com, kernel-team@lge.com
Subject: [PATCH v6 07/15] lockdep: Avoid adding redundant direct links of crosslocks
Date: Tue, 14 Mar 2017 17:18:54 +0900 [thread overview]
Message-ID: <1489479542-27030-8-git-send-email-byungchul.park@lge.com> (raw)
In-Reply-To: <1489479542-27030-1-git-send-email-byungchul.park@lge.com>
On my machine (QEMU x86_64, 4 core, mem 512M, enable-kvm), this patch
does not make different between before/after in lockdep_stats. So this
patch looks unnecessary. However, I wonder if it's still true in other
systems. Could anybody check lockdep_stats in your system?
Before (apply all crossrelease patches except this patch):
lock-classes: 988 [max: 8191]
direct dependencies: 5814 [max: 32768]
indirect dependencies: 18915
all direct dependencies: 119802
dependency chains: 6350 [max: 65536]
dependency chain hlocks: 20771 [max: 327680]
in-hardirq chains: 52
in-softirq chains: 361
in-process chains: 5937
stack-trace entries: 80396 [max: 524288]
combined max dependencies: 113926468
hardirq-safe locks: 42
hardirq-unsafe locks: 644
softirq-safe locks: 129
softirq-unsafe locks: 561
irq-safe locks: 135
irq-unsafe locks: 644
hardirq-read-safe locks: 2
hardirq-read-unsafe locks: 127
softirq-read-safe locks: 11
softirq-read-unsafe locks: 119
irq-read-safe locks: 12
irq-read-unsafe locks: 127
uncategorized locks: 165
unused locks: 1
max locking depth: 14
max bfs queue depth: 168
debug_locks: 1
After (apply all crossrelease patches without exception):
lock-classes: 980 [max: 8191]
direct dependencies: 5604 [max: 32768]
indirect dependencies: 18517
all direct dependencies: 112620
dependency chains: 6215 [max: 65536]
dependency chain hlocks: 20401 [max: 327680]
in-hardirq chains: 51
in-softirq chains: 298
in-process chains: 5866
stack-trace entries: 78707 [max: 524288]
combined max dependencies: 91220116
hardirq-safe locks: 42
hardirq-unsafe locks: 637
softirq-safe locks: 117
softirq-unsafe locks: 561
irq-safe locks: 126
irq-unsafe locks: 637
hardirq-read-safe locks: 2
hardirq-read-unsafe locks: 127
softirq-read-safe locks: 10
softirq-read-unsafe locks: 119
irq-read-safe locks: 11
irq-read-unsafe locks: 127
uncategorized locks: 165
unused locks: 1
max locking depth: 15
max bfs queue depth: 168
debug_locks: 1
-----8<-----
next prev parent reply other threads:[~2017-03-14 8:26 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-14 8:18 [PATCH v6 00/15] lockdep: Implement crossrelease feature Byungchul Park
2017-03-14 8:18 ` [PATCH v6 01/15] lockdep: Refactor lookup_chain_cache() Byungchul Park
2017-03-14 8:18 ` [PATCH v6 02/15] lockdep: Add a function building a chain between two classes Byungchul Park
2017-03-14 8:18 ` [PATCH v6 03/15] lockdep: Change the meaning of check_prev_add()'s return value Byungchul Park
2017-03-14 8:18 ` [PATCH v6 04/15] lockdep: Make check_prev_add() able to handle external stack_trace Byungchul Park
2017-03-14 8:18 ` [PATCH v6 05/15] lockdep: Implement crossrelease feature Byungchul Park
2017-04-19 14:25 ` Peter Zijlstra
2017-04-24 5:11 ` Byungchul Park
2017-04-24 10:17 ` Peter Zijlstra
2017-04-25 5:40 ` Byungchul Park
2017-05-16 14:18 ` Peter Zijlstra
2017-05-18 6:22 ` Byungchul Park
2017-04-19 15:08 ` Peter Zijlstra
2017-04-24 4:36 ` Byungchul Park
2017-04-19 17:19 ` Peter Zijlstra
2017-04-24 3:04 ` Byungchul Park
2017-04-24 9:30 ` Peter Zijlstra
2017-04-25 6:59 ` Byungchul Park
2017-04-19 17:20 ` Peter Zijlstra
2017-04-24 3:13 ` Byungchul Park
2017-05-19 8:07 ` Byungchul Park
2017-05-19 10:30 ` Peter Zijlstra
2017-05-19 10:56 ` Byungchul Park
2017-03-14 8:18 ` [PATCH v6 06/15] lockdep: Handle non(or multi)-acquisition of a crosslock Byungchul Park
2017-03-14 8:18 ` Byungchul Park [this message]
2017-03-14 8:18 ` [PATCH v6 08/15] lockdep: Fix incorrect condition to print bug msgs for MAX_LOCKDEP_CHAIN_HLOCKS Byungchul Park
2017-03-14 8:18 ` [PATCH v6 09/15] lockdep: Make print_circular_bug() aware of crossrelease Byungchul Park
2017-03-14 8:18 ` [PATCH v6 10/15] lockdep: Apply crossrelease to completions Byungchul Park
2017-03-14 8:18 ` [PATCH v6 11/15] pagemap.h: Remove trailing white space Byungchul Park
2017-03-14 8:18 ` [PATCH v6 12/15] lockdep: Apply crossrelease to PG_locked locks Byungchul Park
2017-03-14 8:19 ` [PATCH v6 13/15] lockdep: Apply lock_acquire(release) on __Set(__Clear)PageLocked Byungchul Park
2017-03-14 8:19 ` [PATCH v6 14/15] lockdep: Move data of CONFIG_LOCKDEP_PAGELOCK from page to page_ext Byungchul Park
2017-03-14 8:19 ` [PATCH v6 15/15] lockdep: Crossrelease feature documentation Byungchul Park
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