18 Nov, 2009
1 commit
-
[ tglx: compacted it a bit ]
Signed-off-by: Alexey Dobriyan
LKML-Reference:
Signed-off-by: Andrew Morton
Signed-off-by: Thomas Gleixner
08 Nov, 2009
1 commit
-
If a parent directory (ie /proc/irq/) could not be created
we should not attempt to create subdirectories. Otherwise it
would lead that "smp_affinity" and "spurious" entries are may be
registered under /proc root instead of a proper place.Signed-off-by: Cyrill Gorcunov
Cc: Rusty Russell
Cc: Yinghai Lu
LKML-Reference:
Signed-off-by: Ingo Molnar
04 Nov, 2009
2 commits
-
commit 74296a8ed added this function for debug purposes, but it was
never used for anything. Remove it.Signed-off-by: Thomas Gleixner
-
Fix docbook comments to match the actual function names
(set_irq_msi, handle_percpu_irq).Signed-off-by: Liuwenyi
Signed-off-by: Thomas Gleixner
22 Oct, 2009
1 commit
-
Increase TEST_SUSPEND_SECONDS to 10 so the warning in
suspend_test_finish() doesn't annoy the users of slower systems so much.Also, make the warning print the suspend-resume cycle time, so that we
know why the warning actually triggered.Patch prepared during the hacking session at the Kernel Summit in Tokyo.
Signed-off-by: Rafael J. Wysocki
Signed-off-by: Linus Torvalds
16 Oct, 2009
1 commit
-
* branch 'tty-fixes'
tty: use the new 'flush_delayed_work()' helper to do ldisc flush
workqueue: add 'flush_delayed_work()' to run and wait for delayed work
tty: Make flush_to_ldisc() locking more robust
15 Oct, 2009
6 commits
-
* branch 'tty-fixes':
tty: use the new 'flush_delayed_work()' helper to do ldisc flush
workqueue: add 'flush_delayed_work()' to run and wait for delayed work
Make flush_to_ldisc properly handle parallel calls -
…/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
oprofile: warn on freeing event buffer too early
oprofile: fix race condition in event_buffer free
lockdep: Use cpu_clock() for lockstat -
…l/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Fix missing kernel-doc notation
Revert "x86, timers: Check for pending timers after (device) interrupts"
sched: Update the clock of runqueue select_task_rq() selected -
…nel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing/filters: Fix memory leak when setting a filter
tracing: fix trace_vprintk call -
It basically turns a delayed work into an immediate work, and then waits
for it to finish, thus allowing you to force (and wait for) an immediate
flush of a delayed work.We'll want to use this in the tty layer to clean up tty_flush_to_ldisc().
Acked-by: Oleg Nesterov
[ Fixed to use 'del_timer_sync()' as noted by Oleg ]
Signed-off-by: Linus Torvalds -
It basically turns a delayed work into an immediate work, and then waits
for it to finish.
14 Oct, 2009
1 commit
-
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
cciss: Add cciss_allow_hpsa module parameter
cciss: Fix multiple calls to pci_release_regions
blk-settings: fix function parameter kernel-doc notation
writeback: kill space in debugfs item name
writeback: account IO throttling wait as iowait
elv_iosched_store(): fix strstrip() misuse
cfq-iosched: avoid probable slice overrun when idling
cfq-iosched: apply bool value where we return 0/1
cfq-iosched: fix think time allowed for seekers
cfq-iosched: fix the slice residual sign
cfq-iosched: abstract out the 'may this cfqq dispatch' logic
block: use proper BLK_RW_ASYNC in blk_queue_start_tag()
block: Seperate read and write statistics of in_flight requests v2
block: get rid of kblock_schedule_delayed_work()
cfq-iosched: fix possible problem with jiffies wraparound
cfq-iosched: fix issue with rq-rq merging and fifo list ordering
13 Oct, 2009
1 commit
-
Every time we set a filter, we leak memory allocated by
postfix_append_operand() and postfix_append_op().Signed-off-by: Li Zefan
Cc: Steven Rostedt
Cc: Frederic Weisbecker
Cc: Tom Zanussi
Cc: # for v2.6.31.x
LKML-Reference:
Signed-off-by: Ingo Molnar
12 Oct, 2009
2 commits
-
The following htmldocs warnings:
Warning(kernel/sched.c:685): No description found for parameter 'cpu'
Warning(kernel/sched.c:3676): No description found for parameter 'sd'Trigger because new parameters were added to update_rq_clock() and
update_group_power() without updating the kernel-doc notation.Signed-off-by: Jaswinder Singh Rajput
Signed-off-by: Randy Dunlap
Cc: Andrew Morton
Cc: Steven Rostedt
Cc: Peter Zijlstra
LKML-Reference:
Signed-off-by: Ingo Molnar -
After m68k's task_thread_info() doesn't refer to current,
it's possible to remove sched.h from interrupt.h and not break m68k!
Many thanks to Heiko Carstens for allowing this.Signed-off-by: Alexey Dobriyan
09 Oct, 2009
9 commits
-
In try_to_wake_up(), we update the runqueue clock, but
select_task_rq() may select a different runqueue than the one we
updated, leaving the new runqueue's clock stale for a bit.This patch cures occasional huge latencies reported by latencytop
when coming out of idle on a mostly idle NO_HZ box.Signed-off-by: Mike Galbraith
Signed-off-by: Peter Zijlstra
LKML-Reference:
Signed-off-by: Ingo Molnar -
Some tracepoint magic (TRACE_EVENT(lock_acquired)) relies on
the fact that lock hold times are positive and uses div64 on
that. That triggered a build warning on MIPS, and probably
causes bad output in certain circumstances as well.Make it truly positive.
Reported-by: Andrew Morton
Signed-off-by: Peter Zijlstra
LKML-Reference:
Signed-off-by: Ingo Molnar -
It makes sense to do IOWAIT when someone is blocked
due to IO throttle, as suggested by Kame and Peter.There is an old comment for not doing IOWAIT on throttle,
however it has been mismatching the code for a long time.If we stop accounting IOWAIT for 2.6.32, it could be an
undesirable behavior change. So restore the io_schedule.CC: KAMEZAWA Hiroyuki
CC: Peter Zijlstra
Signed-off-by: Wu Fengguang
Signed-off-by: Jens Axboe -
The addition of trace_array_{v}printk used the wrong function for
trace_vprintk to call. This broke trace_marker and trace_vprintk
itself. Although trace_printk may not have been affected by those
that end up calling trace_vbprintk.Signed-off-by: Steven Rostedt
-
…/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
futex: fix requeue_pi key imbalance
futex: Fix typo in FUTEX_WAIT/WAKE_BITSET_PRIVATE definitions
rcu: Place root rcu_node structure in separate lockdep class
rcu: Make hot-unplugged CPU relinquish its own RCU callbacks
rcu: Move rcu_barrier() to rcutree
futex: Move exit_pi_state() call to release_mm()
futex: Nullify robust lists after cleanup
futex: Fix locking imbalance
panic: Fix panic message visibility by calling bust_spinlocks(0) before dying
rcu: Replace the rcu_barrier enum with pointer to call_rcu*() function
rcu: Clean up code based on review feedback from Josh Triplett, part 4
rcu: Clean up code based on review feedback from Josh Triplett, part 3
rcu: Fix rcu_lock_map build failure on CONFIG_PROVE_LOCKING=y
rcu: Clean up code to address Ingo's checkpatch feedback
rcu: Clean up code based on review feedback from Josh Triplett, part 2
rcu: Clean up code based on review feedback from Josh Triplett -
…l/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Set correct normal_prio and prio values in sched_fork() -
…nel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing: user local buffer variable for trace branch tracer
tracing: fix warning on kernel/trace/trace_branch.c andtrace_hw_branches.c
ftrace: check for failure for all conversions
tracing: correct module boundaries for ftrace_release
tracing: fix transposed numbers of lock_depth and preempt_count
trace: Fix missing assignment in trace_ctxwake_*
tracing: Use free_percpu instead of kfree
tracing: Check total refcount before releasing bufs in profile_enable failure -
…/linux/kernel/git/tip/linux-2.6-tip
* 'sparc-perf-events-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
mm, perf_event: Make vmalloc_user() align base kernel virtual address to SHMLBA
perf_event: Provide vmalloc() based mmap() backing -
…el/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf_events: Make ABI definitions available to userspace
perf tools: elf_sym__is_function() should accept "zero" sized functions
tracing/syscalls: Use long for syscall ret format and field definitions
perf trace: Update eval_flag() flags array to match interrupt.h
perf trace: Remove unused code in builtin-trace.c
perf: Propagate term signal to child
08 Oct, 2009
6 commits
-
Just using the tr->buffer for the API to trace_buffer_lock_reserve
is not good enough. This is because the tr->buffer may change, and we
do not want to commit with a different buffer that we reserved from.This patch uses a local variable to hold the buffer that was used to
reserve and commit with.Signed-off-by: Steven Rostedt
-
fix warnings that caused the API change of trace_buffer_lock_reserve()
change files: kernel/trace/trace_hw_branch.c
kernel/trace/trace_branch.cSigned-off-by: Zhenwen Xu
LKML-Reference:
Signed-off-by: Steven Rostedt -
Due to legacy code from back when the dynamic tracer used a daemon,
only core kernel code was checking for failures. This is no longer
the case. We must check for failures any time we perform text modifications.Cc: stable@kernel.org
Signed-off-by: Steven Rostedt -
When the module is about the unload we release its call records.
The ftrace_release function was given wrong values representing
the module core boundaries, thus not releasing its call records.Plus making ftrace_release function module specific.
Signed-off-by: Jiri Olsa
LKML-Reference:
Cc: stable@kernel.org
Signed-off-by: Steven Rostedt -
If futex_wait_requeue_pi() wakes prior to requeue, we drop the
reference to the source futex_key twice, once in
handle_early_requeue_pi_wakeup() and once on our way out.Remove the drop from the handle_early_requeue_pi_wakeup() and keep
the get/drops together in futex_wait_requeue_pi().Reported-by: Helge Bahmann
Signed-off-by: Darren Hart
Cc: Helge Bahmann
Cc: Peter Zijlstra
Cc: Eric Dumazet
Cc: Dinakar Guniguntala
Cc: John Stultz
Cc: stable-2.6.31
LKML-Reference:
Signed-off-by: Thomas Gleixner -
The lock_depth and preempt_count numbers in the latency format is
transposed.Signed-off-by: Steven Rostedt
07 Oct, 2009
4 commits
-
Commit f2e21c9610991e95621a81407cdbab881226419b had unfortunate side
effects with cpufreq governors on some systems.If the system did not switch into NOHZ mode ts->inidle is not set when
tick_nohz_stop_sched_tick() is called from the idle routine. Therefor
all subsequent calls from irq_exit() to tick_nohz_stop_sched_tick()
fail to call tick_nohz_start_idle(). This results in bogus idle
accounting information which is passed to cpufreq governors.Set the inidle flag unconditionally of the NOHZ active state to keep
the idle time accounting correct in any case.[ tglx: Added comment and tweaked the changelog ]
Reported-by: Steven Noonan
Signed-off-by: Eero Nurkkala
Cc: Rik van Riel
Cc: Venkatesh Pallipadi
Cc: Greg KH
Cc: Steven Noonan
Cc: stable@kernel.org
LKML-Reference:
Signed-off-by: Thomas Gleixner -
Before this patch, all of the rcu_node structures were in the same lockdep
class, so that lockdep would complain when rcu_preempt_offline_tasks()
acquired the root rcu_node structure's lock while holding one of the leaf
rcu_nodes' locks.This patch changes rcu_init_one() to use a separate
spin_lock_init() for the root rcu_node structure's lock than is
used for that of all of the rest of the rcu_node structures, which
puts the root rcu_node structure's lock in its own lockdep class.Suggested-by: Peter Zijlstra
Signed-off-by: Paul E. McKenney
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: akpm@linux-foundation.org
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference:
Signed-off-by: Ingo Molnar -
The current interaction between RCU and CPU hotplug requires that
RCU block in CPU notifiers waiting for callbacks to drain.This can be greatly simplified by having each CPU relinquish its
own callbacks, and for both _rcu_barrier() and CPU_DEAD notifiers
to adopt all callbacks that were previously relinquished.This change also eliminates the possibility of certain types of
hangs due to the previous practice of waiting for callbacks to be
invoked from within CPU notifiers. If you don't every wait, you
cannot hang.Signed-off-by: Paul E. McKenney
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: akpm@linux-foundation.org
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference:
Signed-off-by: Ingo Molnar -
Move the existing rcu_barrier() implementation to rcutree.c,
consistent with the fact that the rcu_barrier() implementation is
tied quite tightly to the RCU implementation.This opens the way to simplify and fix rcutree.c's rcu_barrier()
implementation in a later patch.Signed-off-by: Paul E. McKenney
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: akpm@linux-foundation.org
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference:
Signed-off-by: Ingo Molnar
06 Oct, 2009
5 commits
-
exit_pi_state() is called from do_exit() but not from do_execve().
Move it to release_mm() so it gets called from do_execve() as well.Signed-off-by: Thomas Gleixner
LKML-Reference:
Cc: stable@kernel.org
Cc: Anirban Sinha
Cc: Peter Zijlstra -
The robust list pointers of user space held futexes are kept intact
over an exec() call. When the exec'ed task exits exit_robust_list() is
called with the stale pointer. The risk of corruption is minimal, but
still it is incorrect to keep the pointers valid. Actually glibc
should uninstall the robust list before calling exec() but we have to
deal with it anyway.Nullify the pointers after [compat_]exit_robust_list() has been
called.Reported-by: Anirban Sinha
Signed-off-by: Peter Zijlstra
Signed-off-by: Thomas Gleixner
LKML-Reference:
Cc: stable@kernel.org -
The state char variable S should be reassigned, if S == 0.
We are missing the state of the task that is going to sleep for the
context switch events (in the raw mode).Fortunately the problem arises with the sched_switch/wake_up
tracers, not the sched trace events.The formers are legacy now. But still, that was buggy.
Signed-off-by: Hiroshi Shimamoto
Cc: Steven Rostedt
Acked-by: Frederic Weisbecker
LKML-Reference:
Signed-off-by: Ingo Molnar -
Some architectures such as Sparc, ARM and MIPS (basically
everything with flush_dcache_page()) need to deal with dcache
aliases by carefully placing pages in both kernel and user maps.These architectures typically have to use vmalloc_user() for this.
However, on other architectures, vmalloc() is not needed and has
the downsides of being more restricted and slower than regular
allocations.Signed-off-by: Peter Zijlstra
Acked-by: David Miller
Cc: Andrew Morton
Cc: Jens Axboe
Cc: Paul Mackerras
LKML-Reference:
Signed-off-by: Ingo Molnar -
The syscall event definitions use long for the syscall exit ret
value, but unsigned long for the same thing in the format and field
definitions. Change them all to long.Signed-off-by: Tom Zanussi
Acked-by: Frederic Weisbecker
Cc: rostedt@goodmis.org
Cc: lizf@cn.fujitsu.com
Cc: Peter Zijlstra
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Arnaldo Carvalho de Melo
LKML-Reference:
Signed-off-by: Ingo Molnar
