Tony Luck b8dea936e3 tracing: Fix wraparound problems in "uptime" trace clock ... commit 58d4e21e50 upstream. The "uptime" trace clock added in: commit 8aacf017b0 tracing: Add "uptime" trace clock that uses jiffies has wraparound problems when the system has been up more than 1 hour 11 minutes and 34 seconds. It converts jiffies to nanoseconds using: (u64)jiffies_to_usecs(jiffy) * 1000ULL but since jiffies_to_usecs() only returns a 32-bit value, it truncates at 2^32 microseconds. An additional problem on 32-bit systems is that the argument is "unsigned long", so fixing the return value only helps until 2^32 jiffies (49.7 days on a HZ=1000 system). Avoid these problems by using jiffies_64 as our basis, and not converting to nanoseconds (we do convert to clock_t because user facing API must not be dependent on internal kernel HZ values). Link: http://lkml.kernel.org/p/99d63c5bfe9b320a3b428d773825a37095bf6a51.1405708254.git.tony.luck@intel.com Fixes: 8aacf017b0 "tracing: Add "uptime" trace clock that uses jiffies" Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-07-31 12:52:55 -07:00
..
Kconfig	…
Makefile	…
blktrace.c	…
ftrace.c	tracing: Fix graph tracer with stack tracer on other archs	2014-07-28 08:05:57 -07:00
power-traces.c	…
ring_buffer.c	ring-buffer: Fix polling on trace_pipe	2014-07-28 08:06:02 -07:00
ring_buffer_benchmark.c	…
rpm-traces.c	…
trace.c	tracing: Fix wraparound problems in "uptime" trace clock	2014-07-31 12:52:55 -07:00
trace.h	ring-buffer: Check if buffer exists before polling	2014-07-17 16:21:06 -07:00
trace_branch.c	…
trace_clock.c	tracing: Fix wraparound problems in "uptime" trace clock	2014-07-31 12:52:55 -07:00
trace_entries.h	…
trace_event_perf.c	…
trace_events.c	tracing: instance_rmdir() leaks ftrace_event_file->filter	2014-07-28 08:05:57 -07:00
trace_events_filter.c	…
trace_events_filter_test.h	…
trace_events_trigger.c	…
trace_export.c	…
trace_functions.c	…
trace_functions_graph.c	…
trace_irqsoff.c	…
trace_kdb.c	…
trace_kprobe.c	…
trace_mmiotrace.c	…
trace_nop.c	…
trace_output.c	…
trace_output.h	…
trace_printk.c	…
trace_probe.c	…
trace_probe.h	…
trace_sched_switch.c	…
trace_sched_wakeup.c	…
trace_selftest.c	…
trace_selftest_dynamic.c	…
trace_stack.c	…
trace_stat.c	…
trace_stat.h	…
trace_syscalls.c	…
trace_uprobe.c	…