Steven Rostedt db630637b2 [PATCH] clean up and remove some extra spinlocks from rtmutex ... Oleg brought up some interesting points about grabbing the pi_lock for some protections. In this discussion, I realized that there are some places that the pi_lock is being grabbed when it really wasn't necessary. Also this patch does a little bit of clean up. This patch basically does three things: 1) renames the "boost" variable to "chain_walk". Since it is used in the debugging case when it isn't going to be boosted. It better describes what the test is going to do if it succeeds. 2) moves get_task_struct to just before the unlocking of the wait_lock. This removes duplicate code, and makes it a little easier to read. The owner wont go away while either the pi_lock or the wait_lock are held. 3) removes the pi_locking and owner blocked checking completely from the debugging case. This is because the grabbing the lock and doing the check, then releasing the lock is just so full of races. It's just as good to go ahead and call the pi_chain_walk function, since after releasing the lock the owner can then block anyway, and we would have missed that. For the debug case, we really do want to do the chain walk to test for deadlocks anyway. [oleg@tv-sign.ru: more of the same] Signed-of-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Esben Nielsen <nielsen.esben@googlemail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-09-29 09:18:09 -07:00
..
irq	[PATCH] irq: remove a extra line	2006-09-29 09:18:07 -07:00
power	Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6	2006-09-26 11:49:46 -07:00
time	[PATCH] time: rename clocksource functions	2006-06-26 09:58:21 -07:00
.gitignore	gitignore: ignore more generated files	2006-01-03 11:35:26 +01:00
acct.c	[PATCH] Fix sighand->siglock usage in kernel/acct.c	2006-07-14 21:53:54 -07:00
audit.c	[PATCH] selinux: rename selinux_ctxid_to_string	2006-09-26 08:48:52 -07:00
audit.h	[PATCH] audit: AUDIT_PERM support	2006-09-11 13:32:30 -04:00
auditfilter.c	[PATCH] selinux: rename selinux_ctxid_to_string	2006-09-26 08:48:52 -07:00
auditsc.c	[PATCH] selinux: rename selinux_ctxid_to_string	2006-09-26 08:48:52 -07:00
capability.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
compat.c	[PATCH] N32 sigset and __COMPAT_ENDIAN_SWAP__	2006-06-25 10:01:15 -07:00
configs.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
cpu.c	[PATCH] Disable CPU hotplug during suspend	2006-09-26 08:48:59 -07:00
cpuset.c	[PATCH] inode-diet: Eliminate i_blksize from the inode structure	2006-09-27 08:26:18 -07:00
delayacct.c	[PATCH] task delay accounting fixes	2006-09-01 11:39:08 -07:00
dma.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
exec_domain.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
exit.c	[PATCH] eligible_child: remove an obsolete ->tgid check	2006-09-02 14:51:27 -07:00
extable.c	[PATCH] symbol_put_addr() locks kernel	2006-05-15 11:20:55 -07:00
fork.c	[PATCH] ifdef blktrace debugging fields	2006-09-29 09:18:09 -07:00
futex_compat.c	[PATCH] futex: Apply recent futex fixes to futex_compat	2006-08-06 08:57:49 -07:00
futex.c	[PATCH] Use the correct restart option for futex_lock_pi	2006-09-08 10:22:50 -07:00
hrtimer.c	[PATCH] fix hrtimer percpu usage typo	2006-08-14 12:54:28 -07:00
itimer.c	[PATCH] hrtimers: remove data field	2006-03-26 08:57:03 -08:00
kallsyms.c	[PATCH] null-terminate over-long /proc/kallsyms symbols	2006-07-14 21:53:52 -07:00
Kconfig.hz	[PATCH] i386: Selectable Frequency of the Timer Interrupt	2005-06-23 09:45:10 -07:00
Kconfig.preempt	[PATCH] sched: voluntary kernel preemption	2005-06-25 16:24:45 -07:00
kexec.c	[POWERPC] Add the use of the firmware soft-reset-nmi to kdump.	2006-06-28 15:18:52 +10:00
kfifo.c	[PATCH] gfp flags annotations - part 1	2005-10-08 15:00:57 -07:00
kmod.c	[PATCH] bug fix in kernel/kmod.c	2006-09-16 12:54:32 -07:00
kprobes.c	[PATCH] IA64: kprobe invalidate icache of jump buffer	2006-07-31 13:28:38 -07:00
ksysfs.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
kthread.c	[PATCH] remove kernel/kthread.c:kthread_stop_sem()	2006-07-14 21:53:52 -07:00
lockdep_internals.h	[PATCH] lockdep: double the number of stack-trace entries	2006-09-13 07:32:14 -07:00
lockdep_proc.c	[PATCH] lockdep: procfs	2006-07-03 15:27:04 -07:00
lockdep.c	[PATCH] Avoid recursion in lockdep when stack tracer takes locks	2006-09-26 10:52:34 +02:00
Makefile	[PATCH] per-task-delay-accounting: taskstats interface	2006-07-14 21:53:56 -07:00
module.c	[PATCH] load_module: no BUG if module_subsys uninitialized	2006-09-25 17:38:36 -07:00
mutex-debug.c	[PATCH] lockdep: prove mutex locking correctness	2006-07-03 15:27:04 -07:00
mutex-debug.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
mutex.c	[PATCH] lockdep: prove mutex locking correctness	2006-07-03 15:27:04 -07:00
mutex.h	[PATCH] lockdep: prove mutex locking correctness	2006-07-03 15:27:04 -07:00
panic.c	[PATCH] Add the __stack_chk_fail() function	2006-09-26 10:52:39 +02:00
params.c	[PATCH] module_subsys: initialize earlier	2006-09-29 09:18:08 -07:00
pid.c	[PATCH] pid: remove temporary debug code in attach_pid	2006-09-27 08:26:19 -07:00
posix-cpu-timers.c	[PATCH] arm_timer: remove a racy and obsolete PF_EXITING check	2006-06-17 10:52:13 -07:00
posix-timers.c	[PATCH] hrtimers: remove data field	2006-03-26 08:57:03 -08:00
printk.c	[PATCH] PM: make it possible to disable console suspending	2006-09-26 08:49:03 -07:00
profile.c	[PATCH] Profiling: require buffer allocation on the correct node	2006-09-26 08:48:50 -07:00
ptrace.c	[PATCH] NOMMU: Check that access_process_vm() has a valid target	2006-09-27 08:26:14 -07:00
rcupdate.c	[PATCH] rcu_do_batch: make ->qlen decrement irq safe	2006-09-13 07:32:14 -07:00
rcutorture.c	[PATCH] rcu: add lock annotations to rcu{,_bh}_torture_read_{lock,unlock}	2006-09-29 09:18:08 -07:00
relay.c	[PATCH] kernel-doc for relay interface	2006-09-29 09:18:06 -07:00
resource.c	Resources: insert identical resources above existing resources	2006-09-26 17:43:52 -07:00
rtmutex_common.h	[PATCH] pi-futex: futex_lock_pi/futex_unlock_pi support	2006-06-27 17:32:47 -07:00
rtmutex-debug.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
rtmutex-debug.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
rtmutex-tester.c	[PATCH] Add try_to_freeze() to rt-test kthreads	2006-07-14 21:53:53 -07:00
rtmutex.c	[PATCH] clean up and remove some extra spinlocks from rtmutex	2006-09-29 09:18:09 -07:00
rtmutex.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
rwsem.c	[PATCH] lockdep: prove rwsem locking correctness	2006-07-03 15:27:04 -07:00
sched.c	[PATCH] Fix longstanding load balancing bug in the scheduler	2006-09-26 08:48:43 -07:00
seccomp.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
signal.c	[PATCH] NOMMU: move the fallback arch_vma_name() to a sensible place	2006-09-27 08:26:15 -07:00
softirq.c	[PATCH] Reducing local_bh_enable/disable overhead in irqtrace	2006-07-31 13:28:42 -07:00
softlockup.c	[PATCH] cpu hotplug: replace __devinit* with __cpuinit* for cpu notifications	2006-07-31 13:28:39 -07:00
spinlock.c	[PATCH] remove generic__raw_read_trylock()	2006-09-29 09:18:03 -07:00
stacktrace.c	[PATCH] lockdep: stacktrace subsystem, core	2006-07-03 15:27:02 -07:00
stop_machine.c	[PATCH] Remove redundant up() in stop_machine()	2006-08-27 11:01:31 -07:00
sys_ni.c	[PATCH] sys_move_pages: 32bit support (i386, x86_64)	2006-06-23 07:42:53 -07:00
sys.c	[PATCH] x86: Add portable getcpu call	2006-09-26 10:52:28 +02:00
sysctl.c	[PATCH] sysctl: Allow /proc/sys without sys_sysctl	2006-09-27 08:26:19 -07:00
taskstats.c	[NETLINK]: Extend netlink messaging interface	2006-09-22 14:53:43 -07:00
time.c	[PATCH] Time: Introduce arch generic time accessors	2006-06-26 09:58:20 -07:00
timer.c	[PATCH] timer: add lock annotation to lock_timer_base	2006-09-29 09:18:09 -07:00
uid16.c	[PATCH] Add more prevent_tail_call()	2006-04-19 16:27:18 -07:00
unwind.c	[PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder	2006-09-26 10:52:41 +02:00
user.c	[PATCH] selinux: add hooks for key subsystem	2006-06-22 15:05:55 -07:00
wait.c	[PATCH] uninline init_waitqueue_head()	2006-07-10 13:24:25 -07:00
workqueue.c	[PATCH] workqueue: remove lock_cpu_hotplug()	2006-08-14 12:54:29 -07:00