On Thu, Mar 06, 2014 at 02:25:28PM +0900, Fernando Luis Vázquez Cao wrote: > From: Fernando Luis Vazquez Cao <[email protected]> > > 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 95ef1e52922 > ("KVM guest: prevent tracing recursion with kvmclock"). > > Cc: Linus Torvalds <[email protected]> > Cc: Andrew Morton <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Steven Rostedt <[email protected]> > Signed-off-by: Fernando Luis Vazquez Cao <[email protected]>
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