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, npiggin@gmail.com
Subject: [PATCH v4 08/15] lockdep: Make crossrelease use save_stack_trace_fast()
Date: Fri, 9 Dec 2016 14:12:04 +0900 [thread overview]
Message-ID: <1481260331-360-9-git-send-email-byungchul.park@lge.com> (raw)
In-Reply-To: <1481260331-360-1-git-send-email-byungchul.park@lge.com>
Currently crossrelease feature uses save_stack_trace() to save
backtrace. However, it has much overhead. So this patch makes it
use save_stack_trace_norm() instead, which has smaller overhead.
Signed-off-by: Byungchul Park <byungchul.park@lge.com>
---
kernel/locking/lockdep.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 2c8b2c1..fbd07ee 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4768,7 +4768,7 @@ static void add_plock(struct held_lock *hlock, unsigned int prev_gen_id,
plock->trace.max_entries = MAX_PLOCK_TRACE_ENTRIES;
plock->trace.entries = plock->trace_entries;
plock->trace.skip = 3;
- save_stack_trace(&plock->trace);
+ save_stack_trace_fast(&plock->trace);
}
}
--
1.9.1
WARNING: multiple messages have this Message-ID (diff)
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, npiggin@gmail.com
Subject: [PATCH v4 08/15] lockdep: Make crossrelease use save_stack_trace_fast()
Date: Fri, 9 Dec 2016 14:12:04 +0900 [thread overview]
Message-ID: <1481260331-360-9-git-send-email-byungchul.park@lge.com> (raw)
In-Reply-To: <1481260331-360-1-git-send-email-byungchul.park@lge.com>
Currently crossrelease feature uses save_stack_trace() to save
backtrace. However, it has much overhead. So this patch makes it
use save_stack_trace_norm() instead, which has smaller overhead.
Signed-off-by: Byungchul Park <byungchul.park@lge.com>
---
kernel/locking/lockdep.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 2c8b2c1..fbd07ee 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4768,7 +4768,7 @@ static void add_plock(struct held_lock *hlock, unsigned int prev_gen_id,
plock->trace.max_entries = MAX_PLOCK_TRACE_ENTRIES;
plock->trace.entries = plock->trace_entries;
plock->trace.skip = 3;
- save_stack_trace(&plock->trace);
+ save_stack_trace_fast(&plock->trace);
}
}
--
1.9.1
--
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next prev parent reply other threads:[~2016-12-09 5:18 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-09 5:11 [PATCH v4 00/15] lockdep: Implement crossrelease feature Byungchul Park
2016-12-09 5:11 ` Byungchul Park
2016-12-09 5:11 ` [PATCH v4 01/15] x86/dumpstack: Optimize save_stack_trace Byungchul Park
2016-12-09 5:11 ` Byungchul Park
2016-12-09 5:11 ` [PATCH v4 02/15] x86/dumpstack: Add save_stack_trace()_fast() Byungchul Park
2016-12-09 5:11 ` Byungchul Park
2016-12-09 5:11 ` [PATCH v4 03/15] lockdep: Refactor lookup_chain_cache() Byungchul Park
2016-12-09 5:11 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 04/15] lockdep: Add a function building a chain between two classes Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2017-01-10 21:00 ` Peter Zijlstra
2017-01-10 21:00 ` Peter Zijlstra
2017-01-12 1:41 ` Byungchul Park
2017-01-12 1:41 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 05/15] lockdep: Make check_prev_add can use a separate stack_trace Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2017-01-12 16:16 ` Peter Zijlstra
2017-01-12 16:16 ` Peter Zijlstra
2017-01-13 2:45 ` Byungchul Park
2017-01-13 2:45 ` Byungchul Park
2017-01-13 4:09 ` [PATCH] lockdep: Make a stack_trace instance passed to check_prev_add as an arg Byungchul Park
2017-01-13 4:38 ` Byungchul Park
2017-01-13 10:11 ` [PATCH v4 05/15] lockdep: Make check_prev_add can use a separate stack_trace Byungchul Park
2017-01-13 10:11 ` Byungchul Park
2017-01-13 10:17 ` [PATCH 1/2] lockdep: Refactor save_trace() Byungchul Park
2017-01-13 10:17 ` [PATCH 2/2] lockdep: Pass a callback arg to check_prev_add() to handle stack_trace Byungchul Park
2017-01-17 15:54 ` [PATCH v4 05/15] lockdep: Make check_prev_add can use a separate stack_trace Peter Zijlstra
2017-01-17 15:54 ` Peter Zijlstra
2017-01-18 2:04 ` Byungchul Park
2017-01-18 2:04 ` Byungchul Park
2017-01-18 15:10 ` Peter Zijlstra
2017-01-18 15:10 ` Peter Zijlstra
2017-01-19 2:47 ` Byungchul Park
2017-01-19 2:47 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 06/15] lockdep: Make save_trace can skip stack tracing of the current Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2017-01-12 16:37 ` Peter Zijlstra
2017-01-12 16:37 ` Peter Zijlstra
2017-01-13 0:18 ` Byungchul Park
2017-01-13 0:18 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 07/15] lockdep: Implement crossrelease feature Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2017-01-13 4:39 ` Lai Jiangshan
2017-01-13 4:39 ` Lai Jiangshan
2017-01-13 5:02 ` Byungchul Park
2017-01-13 5:02 ` Byungchul Park
2017-01-16 15:10 ` Peter Zijlstra
2017-01-16 15:10 ` Peter Zijlstra
2017-01-17 2:05 ` Byungchul Park
2017-01-17 2:05 ` Byungchul Park
2017-01-17 7:12 ` Peter Zijlstra
2017-01-17 7:12 ` Peter Zijlstra
2017-01-17 7:49 ` Byungchul Park
2017-01-17 7:49 ` Byungchul Park
2017-01-17 7:14 ` Peter Zijlstra
2017-01-17 7:14 ` Peter Zijlstra
2017-01-17 7:45 ` Byungchul Park
2017-01-17 7:45 ` Byungchul Park
2017-01-16 15:13 ` Peter Zijlstra
2017-01-16 15:13 ` Peter Zijlstra
2017-01-17 2:33 ` Byungchul Park
2017-01-17 2:33 ` Byungchul Park
2017-01-17 6:24 ` Boqun Feng
2017-01-17 7:43 ` Byungchul Park
2017-01-17 7:43 ` Byungchul Park
2016-12-09 5:12 ` Byungchul Park [this message]
2016-12-09 5:12 ` [PATCH v4 08/15] lockdep: Make crossrelease use save_stack_trace_fast() Byungchul Park
2016-12-09 5:12 ` [PATCH v4 09/15] lockdep: Make print_circular_bug() crosslock-aware Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 10/15] lockdep: Apply crossrelease to completion operation Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 11/15] pagemap.h: Remove trailing white space Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 12/15] lockdep: Apply crossrelease to PG_locked lock Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 13/15] lockdep: Apply lock_acquire(release) on __Set(__Clear)PageLocked Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 14/15] lockdep: Move data used in CONFIG_LOCKDEP_PAGELOCK from page to page_ext Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2016-12-09 5:12 ` [PATCH v4 15/15] lockdep: Crossrelease feature documentation Byungchul Park
2016-12-09 5:12 ` Byungchul Park
2017-01-10 20:08 ` Peter Zijlstra
2017-01-10 20:08 ` Peter Zijlstra
2017-01-11 1:29 ` Byungchul Park
2017-01-11 1:29 ` Byungchul Park
2017-01-18 6:42 ` Boqun Feng
2017-01-18 10:53 ` Byungchul Park
2017-01-18 10:53 ` Byungchul Park
2017-01-18 11:03 ` Peter Zijlstra
2017-01-18 11:03 ` Peter Zijlstra
2017-01-18 11:54 ` Byungchul Park
2017-01-18 11:54 ` Byungchul Park
2017-01-18 12:07 ` Peter Zijlstra
2017-01-18 12:07 ` Peter Zijlstra
2017-01-18 12:14 ` byungchul.park
2017-01-18 12:14 ` byungchul.park
2017-01-18 14:12 ` Peter Zijlstra
2017-01-18 14:12 ` Peter Zijlstra
2017-01-19 1:54 ` Byungchul Park
2017-01-19 1:54 ` Byungchul Park
2017-01-18 12:49 ` byungchul.park
2017-01-18 12:49 ` byungchul.park
2016-12-09 5:21 ` [FYI] Output of 'cat /proc/lockdep' after applying crossrelease Byungchul Park
2016-12-09 5:21 ` Byungchul Park
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