On 04/10/2016, 08:37 PM, Greg Kroah-Hartman wrote: > 3.14-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Jiri Olsa <[email protected]> > > commit 3135a66b768c5ee84c8a98b21d0330dc1c1234b4 upstream.
Where does this come from? fatal: bad object 3135a66b768c5ee84c8a98b21d0330dc1c1234b4 The same for the later perf patch. > Using PAGE_SIZE buffers makes the WRMSR to PERF_GLOBAL_CTRL in > intel_pmu_enable_all() mysteriously hang on Core2. As a workaround, we > don't do this. > > The hard lockup is easily triggered by running 'perf test attr' > repeatedly. Most of the time it gets stuck on sample session with > small periods. > > # perf test attr -vv > 14: struct perf_event_attr setup : > --- start --- > ... > 'PERF_TEST_ATTR=/tmp/tmpuEKz3B /usr/bin/perf record -o > /tmp/tmpuEKz3B/perf.data -c 123 kill >/dev/null 2>&1' ret 1 > > Reported-by: Arnaldo Carvalho de Melo <[email protected]> > Signed-off-by: Jiri Olsa <[email protected]> > Signed-off-by: Peter Zijlstra (Intel) <[email protected]> > Reviewed-by: Andi Kleen <[email protected]> > Cc: Alexander Shishkin <[email protected]> > Cc: Jiri Olsa <[email protected]> > Cc: Kan Liang <[email protected]> > Cc: Linus Torvalds <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Stephane Eranian <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Vince Weaver <[email protected]> > Cc: Wang Nan <[email protected]> > Link: http://lkml.kernel.org/r/[email protected] > Signed-off-by: Ingo Molnar <[email protected]> > Signed-off-by: Greg Kroah-Hartman <[email protected]> > --- > arch/x86/kernel/cpu/perf_event.h | 1 + > arch/x86/kernel/cpu/perf_event_intel_ds.c | 13 +++++++++++-- > 2 files changed, 12 insertions(+), 2 deletions(-) thanks, -- js suse labs
