Fernando Luis Vazquez Cao 96b3d28bf4 sched/clock: Prevent tracing recursion in sched_clock_cpu() ...

Prevent tracing of preempt_disable/enable() in sched_clock_cpu().
When CONFIG_DEBUG_PREEMPT is enabled, preempt_disable/enable() are
traced and this causes trace_clock() users (and probably others) to
go into an infinite recursion. Systems with a stable sched_clock()
are not affected.

This problem is similar to that fixed by upstream commit 95ef1e5292
("KVM guest: prevent tracing recursion with kvmclock").

Signed-off-by: Fernando Luis Vazquez Cao <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Acked-by: Steven Rostedt <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link: http://lkml.kernel.org/r/1394083528.4524.3.camel@nexus
Signed-off-by: Ingo Molnar <[email protected]>

2014-03-11 11:33:48 +01:00

..

auto_group.c

…

auto_group.h

…

clock.c

sched/clock: Prevent tracing recursion in sched_clock_cpu()

2014-03-11 11:33:48 +01:00

completion.c

sched: Move completion code from core.c to completion.c

2013-11-06 07:49:19 +01:00

core.c

sched/deadline: Deny unprivileged users to set/change SCHED_DEADLINE policy

2014-03-11 11:33:46 +01:00

cpuacct.c

cgroup: replace cftype->read_seq_string() with cftype->seq_show()

2013-12-05 12:28:04 -05:00

cpuacct.h

…

cpudeadline.c

sched/deadline: Switch CPU's presence test order

2014-02-27 12:29:40 +01:00

cpudeadline.h

sched/deadline: speed up SCHED_DEADLINE pushes with a push-heap

2014-01-13 13:46:46 +01:00

cpupri.c

…

cpupri.h

…

cputime.c

…

deadline.c

sched/deadline: Prevent rt_time growth to infinity

2014-02-27 12:29:41 +01:00

debug.c

sched/clock, x86: Use a static_key for sched_clock_stable

2014-01-13 15:13:13 +01:00

fair.c

sched: Fix double normalization of vruntime

2014-02-27 12:29:38 +01:00

features.h

sched/numa: Resist moving tasks towards nodes with fewer hinting faults

2013-10-09 12:40:27 +02:00

idle_task.c

sched/numa: Introduce migrate_swap()

2013-10-09 12:40:46 +02:00

Makefile

sched/deadline: speed up SCHED_DEADLINE pushes with a push-heap

2014-01-13 13:46:46 +01:00

proc.c

…

rt.c

sched/deadline: Prevent rt_time growth to infinity

2014-02-27 12:29:41 +01:00

sched.h

sched/deadline: Remove useless dl_nr_total

2014-02-21 21:27:10 +01:00

stats.c

…

stats.h

…

stop_task.c

sched/deadline: Add SCHED_DEADLINE structures & implementation

2014-01-13 13:41:06 +01:00

wait.c

sched: Move wait code from core.c to wait.c

2013-11-06 07:49:18 +01:00