Commit graph

2475 commits

Author SHA1 Message Date
Robin Getz
cb00e99c0a fix - ensure we don't use bootconsoles after init has been released
Gerd Hoffmann pointed out that my patch from yesterday can lead
to a null pointer dereference if the kernel is booted with no
console, and no earlyprintk defined. This fixes that issue.

Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-21 20:23:53 -07:00
Robin Getz
0c5564bd91 ensure we don't use bootconsoles after init has been released
This is a followup to the cleanups for earlyprintk patch from Gerd Hoffmann

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=69331af79cf29e26d1231152a172a1a10c2df511

This ensures that a bootconsole is unregistered if it is not replaced.
The current implementation spews garbage out the bootconsole in this case,
since the bootconsole structure is normally in the init section, and is
freed, but still used.

Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Cc: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-20 22:42:01 -07:00
Christian Heim
e598fbaabd Remove double inclusion of linux/capability.h
Remove the second inclusion of linux/capability.h, which has been
introduced with "[PATCH] move capable() to capability.h" (commit
c59ede7b78)

Signed-off-by: Christian Heim <phreak@gentoo.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-19 10:12:32 -07:00
Linus Torvalds
738ddd3039 Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
  sched: run_rebalance_domains: s/SCHED_IDLE/CPU_IDLE/
  sched: fix sleeper bonus
  sched: make global code static
2007-08-12 11:06:45 -07:00
Thomas Gleixner
2464286ace genirq: suppress resend of level interrupts
Level type interrupts are resent by the interrupt hardware when they are
still active at irq_enable().

Suppress the resend mechanism for interrupts marked as level.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-12 11:05:45 -07:00
Thomas Gleixner
496634217e genirq: cleanup mismerge artifact
Commit 5a43a066b1: "genirq: Allow fasteoi
handler to retrigger disabled interrupts" was erroneously applied to
handle_level_irq().  This added the irq retrigger / resend functionality
to the level irq handler.

Revert the offending bits.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-12 11:05:45 -07:00
Oleg Nesterov
de0cf899bb sched: run_rebalance_domains: s/SCHED_IDLE/CPU_IDLE/
rebalance_domains(SCHED_IDLE) looks strange (typo), change it to CPU_IDLE.

the effect of this bug was slightly more agressive idle-balancing on
SMP than intended.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-12 18:08:19 +02:00
Ingo Molnar
5d2b3d3695 sched: fix sleeper bonus
Peter Ziljstra noticed that the sleeper bonus deduction code
was not properly rate-limited: a task that scheduled more
frequently would get a disproportionately large deduction.
So limit the deduction to delta_exec.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-12 18:08:19 +02:00
Adrian Bunk
6707de00fd sched: make global code static
This patch makes the following needlessly global code static:

- arch_reinit_sched_domains()
- struct attr_sched_mc_power_savings
- struct attr_sched_smt_power_savings

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-12 18:08:19 +02:00
Linus Torvalds
d291676ce8 Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
  sched debug: dont print kernel address in /proc/sched_debug
  sched: fix typo in the FAIR_GROUP_SCHED branch
  sched: improve rq-clock overflow logic
2007-08-11 15:58:37 -07:00
Peter Chubb
cd5bfea278 fix compilation with gcc 4.2
gcc-4.2 is a lot more picky about its symbol handling.  EXPORT_SYMBOL no
longer works on symbols that are undefined or defined with static scope.

For example, with CONFIG_PROFILE off, I see:

  kernel/profile.c:206: error: __ksymtab_profile_event_unregister causes a section type conflict
  kernel/profile.c:205: error: __ksymtab_profile_event_register causes a section type conflict

This patch moves the EXPORTs inside the #ifdef CONFIG_PROFILE, so we
only try to export symbols that are defined.

Also, in kernel/kprobes.c there's an EXPORT_SYMBOL_GPL() for
jprobes_return, which if CONFIG_JPROBES is undefined is a static
inline and gives the same error.

And in drivers/acpi/resources/rsxface.c, there's an
ACPI_EXPORT_SYMBOPL() for a static symbol. If it's static, it's not
accessible from outside the compilation unit, so should bot be exported.

These three changes allow building a zx1_defconfig kernel with gcc 4.2
on IA64.

[akpm@linux-foundation.org: export jpobe_return properly]
Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-11 15:47:42 -07:00
Miao Xie
6ddfca9548 timer: remove clockevents_unregister_notifier
I find a function(clockevents_unregister_notifier) which is not called by
anything in tree.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-11 15:47:42 -07:00
Rafael J. Wysocki
c5a69adff9 Hibernation: do not try to mark invalid PFNs as nosave
On some systems some PFNs reported by the early initialization code as
'nosave' may be invalid.  If we try to set the corresponding bits in the
hibernation bitmap, BUG_ON() in memory_bm_find_bit() will be triggered and
the system won't be able to boot (cf.
https://bugzilla.novell.com/show_bug.cgi?id=296242).

Prevent this from happening by verifying if the 'nosave' PFNs are valid in
mark_nosave_pages().

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-11 15:47:40 -07:00
Lee Schermerhorn
8daec965e7 Fix missing numa_zonelist_order sysctl
Misplaced #endif is hiding the numa_zonelist_order sysctl when !SECURITY.

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-11 15:47:40 -07:00
Ingo Molnar
5167e75f4d sched debug: dont print kernel address in /proc/sched_debug
Arjan van de Ven pointed out that we should not print kernel addresses
in world-readable /proc files - fix that.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-08-10 23:05:11 +02:00
Ingo Molnar
e56f31aad9 sched: fix typo in the FAIR_GROUP_SCHED branch
while there's no in-tree way to turn group scheduling at the moment,
fix a typo in it nevertheless.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-10 23:05:11 +02:00
Ingo Molnar
529c77261b sched: improve rq-clock overflow logic
improve the rq-clock overflow logic: limit the absolute rq->clock
delta since the last scheduler tick, instead of limiting the delta
itself.

tested by Arjan van de Ven - whole laptop was misbehaving due to
an incorrectly calibrated cpu_khz confusing sched_clock().

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-08-10 23:05:11 +02:00
Linus Torvalds
be12014dd7 Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched: (61 commits)
  sched: refine negative nice level granularity
  sched: fix update_stats_enqueue() reniced codepath
  sched: round a bit better
  sched: make the multiplication table more accurate
  sched: optimize update_rq_clock() calls in the load-balancer
  sched: optimize activate_task()
  sched: clean up set_curr_task_fair()
  sched: remove __update_rq_clock() call from entity_tick()
  sched: move the __update_rq_clock() call to scheduler_tick()
  sched debug: remove the 'u64 now' parameter from print_task()/_rq()
  sched: remove the 'u64 now' local variables
  sched: remove the 'u64 now' parameter from deactivate_task()
  sched: remove the 'u64 now' parameter from dequeue_task()
  sched: remove the 'u64 now' parameter from enqueue_task()
  sched: remove the 'u64 now' parameter from dec_nr_running()
  sched: remove the 'u64 now' parameter from inc_nr_running()
  sched: remove the 'u64 now' parameter from dec_load()
  sched: remove the 'u64 now' parameter from inc_load()
  sched: remove the 'u64 now' parameter from update_curr_load()
  sched: remove the 'u64 now' parameter from ->task_new()
  ...
2007-08-09 08:23:31 -07:00
Linus Torvalds
88ffc35059 Revert "genirq: temporary fix for level-triggered IRQ resend"
This reverts commit 0fc4969b86.  It was
always meant to be temporary, but it's generating more useless noise
than anything else, and we probably should never have done it in the
generic kernel (only had the people involved test it on their own).

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-09 08:10:16 -07:00
Ingo Molnar
7cff8cf61c sched: refine negative nice level granularity
refine the granularity of negative nice level tasks: let them
reschedule more often to offset the effect of them consuming
their wait_runtime proportionately slower. (This makes nice-0
task scheduling smoother in the presence of negatively
reniced tasks.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:52 +02:00
Ingo Molnar
a69edb5560 sched: fix update_stats_enqueue() reniced codepath
the key has to be rescaled to /weight even if it has a positive value.

(this change only affects the scheduling of reniced tasks)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:52 +02:00
Ingo Molnar
194081ebfa sched: round a bit better
round a tiny bit better in high-frequency rescheduling scenarios,
by rounding around zero instead of rounding down.

(this is pretty theoretical though)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:51 +02:00
Ingo Molnar
254753dc32 sched: make the multiplication table more accurate
do small deltas in the weight and multiplication constant table so
that the worst-case numeric error is better than 1:100000000. (8 digits)

the current error table is:

     nice       mult *   inv_mult   error
     ------------------------------------------
     -20:      88761 *      48388  -0.0000000065
     -19:      71755 *      59856  -0.0000000037
     -18:      56483 *      76040   0.0000000056
     -17:      46273 *      92818   0.0000000042
     -16:      36291 *     118348  -0.0000000065
     -15:      29154 *     147320  -0.0000000037
     -14:      23254 *     184698  -0.0000000009
     -13:      18705 *     229616  -0.0000000037
     -12:      14949 *     287308  -0.0000000009
     -11:      11916 *     360437  -0.0000000009
     -10:       9548 *     449829  -0.0000000009
      -9:       7620 *     563644  -0.0000000037
      -8:       6100 *     704093   0.0000000009
      -7:       4904 *     875809   0.0000000093
      -6:       3906 *    1099582  -0.0000000009
      -5:       3121 *    1376151  -0.0000000058
      -4:       2501 *    1717300   0.0000000009
      -3:       1991 *    2157191  -0.0000000035
      -2:       1586 *    2708050   0.0000000009
      -1:       1277 *    3363326   0.0000000014
       0:       1024 *    4194304   0.0000000000
       1:        820 *    5237765   0.0000000009
       2:        655 *    6557202   0.0000000033
       3:        526 *    8165337  -0.0000000079
       4:        423 *   10153587   0.0000000012
       5:        335 *   12820798   0.0000000079
       6:        272 *   15790321   0.0000000037
       7:        215 *   19976592  -0.0000000037
       8:        172 *   24970740  -0.0000000037
       9:        137 *   31350126  -0.0000000079
      10:        110 *   39045157  -0.0000000061
      11:         87 *   49367440  -0.0000000037
      12:         70 *   61356676   0.0000000056
      13:         56 *   76695844  -0.0000000075
      14:         45 *   95443717  -0.0000000072
      15:         36 *  119304647  -0.0000000009
      16:         29 *  148102320  -0.0000000037
      17:         23 *  186737708  -0.0000000028
      18:         18 *  238609294  -0.0000000009
      19:         15 *  286331153  -0.0000000002

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:51 +02:00
Ingo Molnar
6e82a3befe sched: optimize update_rq_clock() calls in the load-balancer
optimize update_rq_clock() calls in the load-balancer: update them
right after locking the runqueue(s) so that the pull functions do
not have to call it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:51 +02:00
Ingo Molnar
2daa357705 sched: optimize activate_task()
optimize activate_task() by removing update_rq_clock() from it.
(and add update_rq_clock() to all callsites of activate_task() that
did not have it before.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:51 +02:00
Ingo Molnar
c3b64f1e4f sched: clean up set_curr_task_fair()
clean up set_curr_task_fair().

( identity transformation that causes no change in functionality. )

   text    data     bss     dec     hex filename
  39170    3750      36   42956    a7cc sched.o.before
  39170    3750      36   42956    a7cc sched.o.after

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:51 +02:00
Ingo Molnar
d9e0e6aa6d sched: remove __update_rq_clock() call from entity_tick()
remove __update_rq_clock() call from entity_tick().

no change in functionality because scheduler_tick() already calls
__update_rq_clock().

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:51 +02:00
Ingo Molnar
546fe3c909 sched: move the __update_rq_clock() call to scheduler_tick()
move the __update_rq_clock() call from update_cpu_load() to
scheduler_tick().

( identity transformation that causes no change in functionality. )

this allows the direct use of rq->clock in ->task_tick() functions.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:51 +02:00
Ingo Molnar
a48da48b40 sched debug: remove the 'u64 now' parameter from print_task()/_rq()
remove the 'u64 now' parameter from sched_debug.c:print_task()/_rq().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:51 +02:00
Ingo Molnar
bdd4dfa89c sched: remove the 'u64 now' local variables
final step: remove all (now superfluous) 'u64 now' variables.

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:51 +02:00
Ingo Molnar
2e1cb74a50 sched: remove the 'u64 now' parameter from deactivate_task()
remove the 'u64 now' parameter from deactivate_task().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
69be72c13d sched: remove the 'u64 now' parameter from dequeue_task()
remove the 'u64 now' parameter from dequeue_task().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
8159f87e2b sched: remove the 'u64 now' parameter from enqueue_task()
remove the 'u64 now' parameter from enqueue_task().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
db53181e41 sched: remove the 'u64 now' parameter from dec_nr_running()
remove the 'u64 now' parameter from dec_nr_running().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
e5fa2237b5 sched: remove the 'u64 now' parameter from inc_nr_running()
remove the 'u64 now' parameter from inc_nr_running().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
79b5dddf83 sched: remove the 'u64 now' parameter from dec_load()
remove the 'u64 now' parameter from dec_load().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
29b4b623fe sched: remove the 'u64 now' parameter from inc_load()
remove the 'u64 now' parameter from inc_load().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
84a1d7a2f9 sched: remove the 'u64 now' parameter from update_curr_load()
remove the 'u64 now' parameter from update_curr_load().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
ee0827d8b5 sched: remove the 'u64 now' parameter from ->task_new()
remove the 'u64 now' parameter from ->task_new().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
31ee529cc2 sched: remove the 'u64 now' parameter from ->put_prev_task()
remove the 'u64 now' parameter from ->put_prev_task().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
ff95f3df54 sched: remove the 'u64 now' parameter from pick_next_task()
remove the 'u64 now' parameter from pick_next_task().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:49 +02:00
Ingo Molnar
fb8d472402 sched: remove the 'u64 now' parameter from ->pick_next_task()
remove the 'u64 now' parameter from ->pick_next_task().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:48 +02:00
Ingo Molnar
f02231e51a sched: remove the 'u64 now' parameter from ->dequeue_task()
remove the 'u64 now' parameter from ->dequeue_task().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:48 +02:00
Ingo Molnar
fd390f6a04 sched: remove the 'u64 now' parameter from ->enqueue_task()
remove the 'u64 now' parameter from ->enqueue_task().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:48 +02:00
Ingo Molnar
f1e14ef64d sched: remove the 'u64 now' parameter from update_curr_rt()
remove the 'u64 now' parameter from update_curr_rt().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:48 +02:00
Ingo Molnar
ab6cde2692 sched: remove the 'u64 now' parameter from put_prev_entity()
remove the 'u64 now' parameter from put_prev_entity().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:48 +02:00
Ingo Molnar
9948f4b2a7 sched: remove the 'u64 now' parameter from pick_next_entity()
remove the 'u64 now' parameter from pick_next_entity().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:48 +02:00
Ingo Molnar
8494f412ed sched: remove the 'u64 now' parameter from set_next_entity()
remove the 'u64 now' parameter from set_next_entity().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:48 +02:00
Ingo Molnar
525c2716a4 sched: remove the 'u64 now' parameter from dequeue_entity()
remove the 'u64 now' parameter from dequeue_entity().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:48 +02:00
Ingo Molnar
668031ca8f sched: remove the 'u64 now' parameter from enqueue_entity()
remove the 'u64 now' parameter from enqueue_entity().

( identity transformation that causes no change in functionality. )

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:48 +02:00