linux-toradex.git/kernel, branch v2.6.28.3

relay: fix lock imbalance in relay_late_setup_files

2009-02-02T17:53:29+00:00

commit b786c6a98ef6fa81114ba7b9fbfc0d67060775e3 upstream.

One fail path in relay_late_setup_files() omits
mutex_unlock(&relay_channels_mutex);
Add it.

Signed-off-by: Jiri Slaby 
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

resources: skip sanity check of busy resources

2009-02-02T17:53:22+00:00

commit 3ac52669c7a24b93663acfcab606d1065ed1accd upstream.

Impact: reduce false positives in iomem_map_sanity_check()

Some drivers (vesafb) only map/reserve a portion of a resource.
If then some other driver comes in and maps the whole resource,
the current code WARN_ON's. This is not the intent of the checks
in iomem_map_sanity_check(); rather these checks want to
warn when crossing *hardware* resources only.

This patch skips BUSY resources as suggested by Linus.

Note: having two drivers talk to the same hardware at the same
time is obviously not optimal behavior, but that's a separate story.

Signed-off-by: Arjan van de Ven 
Signed-off-by: Ingo Molnar 
Signed-off-by: Kyle McMartin 
Signed-off-by: Greg Kroah-Hartman

sched: fix update_min_vruntime

2009-01-25T00:41:35+00:00

commit e17036dac189dd034c092a91df56aa740db7146d upstream.

Impact: fix SCHED_IDLE latency problems

OK, so we have 1 running task A (which is obviously curr and the tree is
equally obviously empty).

'A' nicely chugs along, doing its thing, carrying min_vruntime along as it
goes.

Then some whacko speed freak SCHED_IDLE task gets inserted due to SMP
balancing, which is very likely far right, in that case

update_curr
  update_min_vruntime
    cfs_rq->rb_leftmost := true (the crazy task sitting in a tree)
      vruntime = se->vruntime

and voila, min_vruntime is waaay right of where it ought to be.

OK, so why did I write it like that to begin with...

Aah, yes.

Say we've just dequeued current

schedule
  deactivate_task(prev)
    dequeue_entity
      update_min_vruntime

Then we'll set

  vruntime = cfs_rq->min_vruntime;

we find !cfs_rq->curr, but do find someone in the tree. Then we _must_
do vruntime = se->vruntime, because

 vruntime = min_vruntime(vruntime := cfs_rq->min_vruntime, se->vruntime)

will not advance vruntime, and cause lags the other way around (which we
fixed with that initial patch: 1af5f730fc1bf7c62ec9fb2d307206e18bf40a69
(sched: more accurate min_vruntime accounting).

Signed-off-by: Peter Zijlstra 
Tested-by: Mike Galbraith 
Acked-by: Mike Galbraith 
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

getrusage: RUSAGE_THREAD should return ru_utime and ru_stime

2009-01-18T18:44:05+00:00

commit 8916edef5888c5d8fe283714416a9ca95b4c3431 upstream.

Impact: task stats regression fix

Original getrusage(RUSAGE_THREAD) implementation can return ru_utime and
ru_stime. But commit "f06febc: timers: fix itimer/many thread hang" broke it.

this patch restores it.

Signed-off-by: KOSAKI Motohiro 
Acked-by: Roland McGrath 
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 32

2009-01-18T18:44:01+00:00

commit d4e82042c4cfa87a7d51710b71f568fe80132551 upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 31

2009-01-18T18:44:01+00:00

commit 836f92adf121f806e9beb5b6b88bd5c9c4ea3f24 upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 30

2009-01-18T18:44:01+00:00

commit 6559eed8ca7db0531a207cd80be5e28cd6f213c5 upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 27

2009-01-18T18:44:00+00:00

commit 1e7bfb2134dfec37ce04fb3a4ca89299e892d10c upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 26

2009-01-18T18:44:00+00:00

commit c4ea37c26a691ad0b7e86aa5884aab27830e95c9 upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 24

2009-01-18T18:44:00+00:00

commit e48fbb699f82ef1e80bd7126046394d2dc9ca7e6 upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman