linux-toradex.git/kernel, branch v2.6.19-rc1

Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/configh

2006-10-04T16:59:57+00:00

* master.kernel.org:/pub/scm/linux/kernel/git/davej/configh:
  Remove all inclusions of 

Manually resolved trivial path conflicts due to removed files in
the sound/oss/ subdirectory.

Merge branch 'audit.b32' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current

2006-10-04T15:15:55+00:00

* 'audit.b32' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current:
  [PATCH] message types updated
  [PATCH] name_count array overrun
  [PATCH] PPID filtering fix
  [PATCH] arch filter lists with < or > should not be accepted

[PATCH] rcu: simplify/improve batch tuning

2006-10-04T14:55:31+00:00

Kill a hard-to-calculate 'rsinterval' boot parameter and per-cpu
rcu_data.last_rs_qlen.  Instead, it adds adds a flag rcu_ctrlblk.signaled,
which records the fact that one of CPUs has sent a resched IPI since the
last rcu_start_batch().

Roughly speaking, we need two rcu_start_batch()s in order to move callbacks
from ->nxtlist to ->donelist.  This means that when ->qlen exceeds qhimark
and continues to grow, we should send a resched IPI, and then do it again
after we gone through a quiescent state.

On the other hand, if it was already sent, we don't need to do it again
when another CPU detects overflow of the queue.

Signed-off-by: Oleg Nesterov 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] rcu: add sched torture type to rcutorture

2006-10-04T14:55:31+00:00

Implement torture testing for the "sched" variant of RCU, which uses
preempt_disable, preempt_enable, and synchronize_sched.

Signed-off-by: Josh Triplett 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] rcu: add rcu_bh_sync torture type to rcutorture

2006-10-04T14:55:31+00:00

Use the newly-generic synchronous deferred free function to implement torture
testing for rcu_bh using synchronize_rcu_bh rather than the asynchronous
call_rcu_bh.

Signed-off-by: Josh Triplett 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] rcu: add rcu_sync torture type to rcutorture

2006-10-04T14:55:31+00:00

Use the newly-generic synchronous deferred free function to implement torture
testing for RCU using synchronize_rcu rather than the asynchronous call_rcu.

Signed-off-by: Josh Triplett 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] rcu: refactor srcu_torture_deferred_free to work for any implementation

2006-10-04T14:55:31+00:00

Make srcu_torture_deferred_free use cur_ops->sync() so it will work for any
implementation.  Move and rename it in preparation for use in the ops of other
implementations.

Signed-off-by: Josh Triplett 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] RCU: add fake writers to rcutorture

2006-10-04T14:55:31+00:00

rcutorture currently has one writer and an arbitrary number of readers.  To
better exercise some of the code paths in RCU implementations, add fake
writer threads which call the synchronize function for the RCU variant in a
loop, with a delay between calls to arrange for different numbers of
writers running in parallel.

[bunk@stusta.de: cleanup]
Acked-by: Paul McKenney 
Cc: Dipkanar Sarma 
Signed-off-by: Josh Triplett 
Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] rcu: Fix sign bug making rcu_random always return the same sequence

2006-10-04T14:55:31+00:00

rcu_random uses a counter rrs_count to occasionally mix data from
get_random_bytes into the state of its pseudorandom generator.  However,
the rrs_counter gets declared as an unsigned long, and rcu_random checks
for --rrs_count < 0, so this code will never mix any real random data into
the state, and will thus always return the same sequence of random numbers.

Also, change the return value of rcu_random from long to unsigned long, to
avoid potential issues caused by the use of the % operator, which can
return negative values for negative left operands.

Signed-off-by: Josh Triplett 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] rcu: Avoid kthread_stop on invalid pointer if rcutorture reader startup fails

2006-10-04T14:55:30+00:00

rcu_torture_init kmallocs the array of reader threads, then creates each
one with kthread_run, cleaning up with rcu_torture_cleanup if this fails.
rcu_torture_cleanup calls kthread_stop on any non-NULL pointer in the
array; however, any readers after the one that failed to start up will have
invalid pointers, not null pointers.  Avoid this by using kzalloc instead.

Signed-off-by: Josh Triplett 
Acked-by: Paul E. McKenney 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds