From: "Martin J. Bligh" <mbligh@google.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [PATCH] Default CONFIG_DEBUG_MUTEXES to n
Date: Sat, 15 Apr 2006 15:45:38 -0700 [thread overview]
Message-ID: <44417792.2070900@google.com> (raw)
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CONFIG_DEBUG_MUTEXES has a significant performant impact (reduced perf
of reaim by 50% on ia32 NUMA boxes). It should not be on by default.
Signed-off-by: Martin J. Bligh <mbligh@google.com>
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diff -aurpN -X /home/mbligh/.diff.exclude linux-2.6.17-rc1/lib/Kconfig.debug 2.6.17-rc1_no_mutex_dbg/lib/Kconfig.debug
--- linux-2.6.17-rc1/lib/Kconfig.debug 2006-04-15 15:28:54.000000000 -0700
+++ 2.6.17-rc1_no_mutex_dbg/lib/Kconfig.debug 2006-04-15 15:44:14.000000000 -0700
@@ -101,7 +101,7 @@ config DEBUG_PREEMPT
config DEBUG_MUTEXES
bool "Mutex debugging, deadlock detection"
- default y
+ default n
depends on DEBUG_KERNEL
help
This allows mutex semantics violations and mutex related deadlocks
@@ -109,6 +109,7 @@ config DEBUG_MUTEXES
config DEBUG_SPINLOCK
bool "Spinlock debugging"
+ default n
depends on DEBUG_KERNEL
help
Say Y here and build SMP to catch missing spinlock initialization
next reply other threads:[~2006-04-15 22:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-15 22:45 Martin J. Bligh [this message]
2006-04-15 23:06 ` [PATCH] Default CONFIG_DEBUG_MUTEXES to n Adrian Bunk
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