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locking/csd_lock: Add Kconfig option for csd_debug default
The csd_debug kernel parameter works well, but is inconvenient in cases where it is more closely associated with boot loaders or automation than with a particular kernel version or release. Thererfore, provide a new CSD_LOCK_WAIT_DEBUG_DEFAULT Kconfig option that defaults csd_debug to 1 when selected and 0 otherwise, with this latter being the default. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20230321005516.50558-1-paulmck@kernel.org
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3 changed files with 14 additions and 3 deletions
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@ -893,8 +893,10 @@
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handling. When switched on, additional debug data is
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handling. When switched on, additional debug data is
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printed to the console in case a hanging CPU is
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printed to the console in case a hanging CPU is
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detected, and that CPU is pinged again in order to try
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detected, and that CPU is pinged again in order to try
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to resolve the hang situation.
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to resolve the hang situation. The default value of
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0: disable csdlock debugging (default)
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this option depends on the CSD_LOCK_WAIT_DEBUG_DEFAULT
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Kconfig option.
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0: disable csdlock debugging
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1: enable basic csdlock debugging (minor impact)
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1: enable basic csdlock debugging (minor impact)
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ext: enable extended csdlock debugging (more impact,
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ext: enable extended csdlock debugging (more impact,
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but more data)
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but more data)
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@ -158,7 +158,7 @@ void __init call_function_init(void)
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#ifdef CONFIG_CSD_LOCK_WAIT_DEBUG
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#ifdef CONFIG_CSD_LOCK_WAIT_DEBUG
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static DEFINE_STATIC_KEY_FALSE(csdlock_debug_enabled);
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static DEFINE_STATIC_KEY_MAYBE(CONFIG_CSD_LOCK_WAIT_DEBUG_DEFAULT, csdlock_debug_enabled);
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static DEFINE_STATIC_KEY_FALSE(csdlock_debug_extended);
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static DEFINE_STATIC_KEY_FALSE(csdlock_debug_extended);
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static int __init csdlock_debug(char *str)
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static int __init csdlock_debug(char *str)
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@ -1480,6 +1480,15 @@ config CSD_LOCK_WAIT_DEBUG
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include the IPI handler function currently executing (if any)
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include the IPI handler function currently executing (if any)
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and relevant stack traces.
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and relevant stack traces.
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config CSD_LOCK_WAIT_DEBUG_DEFAULT
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bool "Default csd_lock_wait() debugging on at boot time"
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depends on CSD_LOCK_WAIT_DEBUG
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depends on 64BIT
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default n
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help
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This option causes the csdlock_debug= kernel boot parameter to
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default to 1 (basic debugging) instead of 0 (no debugging).
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endmenu # lock debugging
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endmenu # lock debugging
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config TRACE_IRQFLAGS
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config TRACE_IRQFLAGS
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