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2008-02-08kernel: remove fastcall in kernel/*Harvey Harrison1-15/+14
[[email protected]: coding-style fixes] Signed-off-by: Harvey Harrison <[email protected]> Acked-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-12-06Add mutex_lock_killableLiam R. Howlett1-3/+33
Similar to mutex_lock_interruptible, it can be interrupted by a fatal signal only. Signed-off-by: Liam R. Howlett <[email protected]> Acked-by: Ingo Molnar <[email protected]> Signed-off-by: Matthew Wilcox <[email protected]>
2007-10-11lockdep: fixup mutex annotationsPeter Zijlstra1-15/+20
The fancy mutex_lock fastpath has too many indirections to track the caller hence all contentions are perceived to come from mutex_lock(). Avoid this by explicitly not using the fastpath code (it was disabled already anyway). Signed-off-by: Peter Zijlstra <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2007-07-19lockstat: measure lock bouncingPeter Zijlstra1-1/+1
__acquire | lock _____ | \ | __contended | | | wait | _______/ |/ | __acquired | __release | unlock We measure acquisition and contention bouncing. This is done by recording a cpu stamp in each lock instance. Contention bouncing requires the cpu stamp to be set on acquisition. Hence we move __acquired into the generic path. __acquired is then used to measure acquisition bouncing by comparing the current cpu with the old stamp before replacing it. __contended is used to measure contention bouncing (only useful for preemptable locks) [[email protected]: cleanups] Signed-off-by: Peter Zijlstra <[email protected]> Acked-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-07-19lockstat: hook into spinlock_t, rwlock_t, rwsem and mutexPeter Zijlstra1-0/+8
Call the new lockstat tracking functions from the various lock primitives. Signed-off-by: Peter Zijlstra <[email protected]> Acked-by: Ingo Molnar <[email protected]> Acked-by: Jason Baron <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-05-09wrap access to thread_infoRoman Zippel1-4/+4
Recently a few direct accesses to the thread_info in the task structure snuck back, so this wraps them with the appropriate wrapper. Signed-off-by: Roman Zippel <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-12-08[PATCH] lockdep: avoid lockdep warning in mdNeilBrown1-0/+9
md_open takes ->reconfig_mutex which causes lockdep to complain. This (normally) doesn't have deadlock potential as the possible conflict is with a reconfig_mutex in a different device. I say "normally" because if a loop were created in the array->member hierarchy a deadlock could happen. However that causes bigger problems than a deadlock and should be fixed independently. So we flag the lock in md_open as a nested lock. This requires defining mutex_lock_interruptible_nested. Cc: Ingo Molnar <[email protected]> Acked-by: Peter Zijlstra <[email protected]> Acked-by: Ingo Molnar <[email protected]> Signed-off-by: Neil Brown <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-07-03[PATCH] lockdep: prove mutex locking correctnessIngo Molnar1-6/+22
Use the lock validator framework to prove mutex locking correctness. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Arjan van de Ven <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-07-03[PATCH] lockdep: mutex section binutils workaroundIngo Molnar1-1/+1
Work around weird section nesting build bug causing smp-alternatives failures under certain circumstances. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Arjan van de Ven <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-07-03[PATCH] lockdep: better lock debuggingIngo Molnar1-24/+28
Generic lock debugging: - generalized lock debugging framework. For example, a bug in one lock subsystem turns off debugging in all lock subsystems. - got rid of the caller address passing (__IP__/__IP_DECL__/etc.) from the mutex/rtmutex debugging code: it caused way too much prototype hackery, and lockdep will give the same information anyway. - ability to do silent tests - check lock freeing in vfree too. - more finegrained debugging options, to allow distributions to turn off more expensive debugging features. There's no separate 'held mutexes' list anymore - but there's a 'held locks' stack within lockdep, which unifies deadlock detection across all lock classes. (this is independent of the lockdep validation stuff - lockdep first checks whether we are holding a lock already) Here are the current debugging options: CONFIG_DEBUG_MUTEXES=y CONFIG_DEBUG_LOCK_ALLOC=y which do: config DEBUG_MUTEXES bool "Mutex debugging, basic checks" config DEBUG_LOCK_ALLOC bool "Detect incorrect freeing of live mutexes" Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Arjan van de Ven <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-07-03[PATCH] lockdep: rename DEBUG_WARN_ON()Ingo Molnar1-3/+3
Rename DEBUG_WARN_ON() to the less generic DEBUG_LOCKS_WARN_ON() name, so that it's clear that this is a lock-debugging internal mechanism. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-06-26[PATCH] work around ppc64 bootup bug by making mutex-debugging save/restore irqsIngo Molnar1-9/+12
It seems ppc64 wants to lock mutexes in early bootup code, with interrupts disabled, and they expect interrupts to stay disabled, else they crash. Work around this bug by making mutex debugging variants save/restore irq flags. Signed-off-by: Ingo Molnar <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] mutex: trivial whitespace cleanupsIngo Molnar1-4/+1
Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] mark mutex_lock*() as might_sleep()Ingo Molnar1-0/+2
Mark mutex_lock() and mutex_lock_interruptible() as might_sleep() functions. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] fix i386 mutex fastpath on FRAME_POINTER && !DEBUG_MUTEXESIngo Molnar1-9/+0
Call the mutex slowpath more conservatively - e.g. FRAME_POINTERS can change the calling convention, in which case a direct branch to the slowpath becomes illegal. Bug found by Hugh Dickins. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-09[PATCH] mutex subsystem, coreIngo Molnar1-0/+325
mutex implementation, core files: just the basic subsystem, no users of it. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Arjan van de Ven <[email protected]>
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