perf, x86: P4 PMU -- handle unflagged events

It might happen that an event can overflow without
the proper overflow flag set. Check the sign bit in
the raw counter value to solve this problem.

Tested-by: Lin Ming <[email protected]>
Signed-off-by: Cyrill Gorcunov <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: [email protected]
Cc: Cyrill Gorcunov <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

0 files changed, 0 insertions, 0 deletions