perf_counter: Fix throttling lock-up
authorIngo Molnar <mingo@elte.hu>
Wed, 3 Jun 2009 20:19:36 +0000 (22:19 +0200)
committerIngo Molnar <mingo@elte.hu>
Wed, 3 Jun 2009 21:39:51 +0000 (23:39 +0200)
commit128f048f0f0d2a477ad2555e7acd2ad15a1b6061
tree5927a26da343af2189e47b497eec38680f19294f
parent233f0b95ca3a0d1dcbd70bc7e519069a8e10d23e
perf_counter: Fix throttling lock-up

Throttling logic is broken and we can lock up with too small
hw sampling intervals.

Make the throttling code more robust: disable counters even
if we already disabled them.

( Also clean up whitespace damage i noticed while reading
  various pieces of code related to throttling. )

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/kernel/cpu/perf_counter.c
kernel/perf_counter.c