linux-stable.git/kernel/lockdep_proc.c, branch master

locking: Move the lockdep code to kernel/locking/

2013-11-06T06:55:08+00:00

Suggested-by: Ingo Molnar 
Signed-off-by: Peter Zijlstra 
Link: http://lkml.kernel.org/n/tip-wl7s3tta5isufzfguc23et06@git.kernel.org
Signed-off-by: Ingo Molnar

lockstat: Report avg wait and hold times

2013-10-09T06:19:08+00:00

While both the nr and total times are showed, having the avg
lock hold and wait times show in the report is quite useful when
working on performance related issues. Furthermore, I find
myself constantly doing the calculations manually.

In addition, some of the documentation examples were changed to
easily update them to show the two new columns. No textual
change otherwise, as descriptions match the lockstat output.

Signed-off-by: Davidlohr Bueso 
Cc: aswin@hp.com
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1380746928.2313.14.camel@buesod1.americas.hpqcorp.net
[ Fixlets: changed a seq_printf() to seq_puts(), converted spaces to tabs. ]
Signed-off-by: Ingo Molnar

lockdep: Use KSYM_NAME_LEN'ed buffer for __get_key_name()

2012-10-24T10:39:09+00:00

Not a big deal, but since other __get_key_name() callers
use it lets be consistent.

Signed-off-by: Cyrill Gorcunov 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20121020190519.GH25467@moon
Signed-off-by: Ingo Molnar

kernel: Map most files to use export.h instead of module.h

2011-10-31T13:20:12+00:00

The changed files were only including linux/module.h for the
EXPORT_SYMBOL infrastructure, and nothing else.  Revector them
onto the isolated export header for faster compile times.

Nothing to see here but a whole lot of instances of:

  -#include 
  +#include 

This commit is only changing the kernel dir; next targets
will probably be mm, fs, the arch dirs, etc.

Signed-off-by: Paul Gortmaker

lockdep: Remove unused 'factor' variable from lockdep_stats_show()

2011-03-23T12:54:47+00:00

Signed-off-by: Sergey Senozhatsky 
Cc: Peter Zijlstra 
LKML-Reference: <20110323123828.GB4244@swordfish.minsk.epam.com>
Signed-off-by: Ingo Molnar

locking, lockdep: Convert sprintf_symbol to %pS

2010-11-10T09:23:58+00:00

Signed-off-by: Joe Perches 
Cc: Peter Zijlstra 
Cc: Jiri Kosina 
LKML-Reference: <1288998760-11775-6-git-send-email-joe@perches.com>
Signed-off-by: Ingo Molnar

lockstat: Make lockstat counting per cpu

2010-04-05T22:15:37+00:00

Locking statistics are implemented using global atomic
variables. This is usually fine unless some path write them very
often.

This is the case for the function and function graph tracers
that disable irqs for each entry saved (except if the function
tracer is in preempt disabled only mode).
And calls to local_irq_save/restore() increment
hardirqs_on_events and hardirqs_off_events stats (or similar
stats for redundant versions).

Incrementing these global vars for each function ends up in too
much cache bouncing if lockstats are enabled.

To solve this, implement the debug_atomic_*() operations using
per cpu vars.

 -v2: Use per_cpu() instead of get_cpu_var() to fetch the desired
      cpu vars on debug_atomic_read()

 -v3: Store the stats in a structure. No need for local_t as we
      are NMI/irq safe.

 -v4: Fix tons of build errors. I thought I had tested it but I
      probably forgot to select the relevant config.

Suggested-by: Steven Rostedt 
Signed-off-by: Frederic Weisbecker 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
LKML-Reference: <1270505417-8144-1-git-send-regression-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar 
Cc: Peter Zijlstra 
Cc: Steven Rostedt

seq_file: constify seq_operations

2009-09-23T14:39:29+00:00

Make all seq_operations structs const, to help mitigate against
revectoring user-triggerable function pointers.

This is derived from the grsecurity patch, although generated from scratch
because it's simpler than extracting the changes from there.

Signed-off-by: James Morris 
Acked-by: Serge Hallyn 
Acked-by: Casey Schaufler 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge commit 'v2.6.31-rc8' into core/locking

2009-08-31T16:05:25+00:00

Merge reason: we were on -rc4, move to -rc8 before applying
              a new batch of locking infrastructure changes.

Signed-off-by: Ingo Molnar

lockdep: Remove recursion stattistics

2009-08-29T11:22:36+00:00

Since lockdep has introduced BFS to avoid recursion, statistics
for recursion does not make any sense now. So remove them.

Signed-off-by: Ming Lei 
Cc: a.p.zijlstra@chello.nl
LKML-Reference: <1251542879-5211-1-git-send-email-tom.leiming@gmail.com>
Signed-off-by: Ingo Molnar