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authorMaria Dimakopoulou <maria.n.dimakopoulou@gmail.com>2013-12-05 01:24:37 +0200
committerIngo Molnar <mingo@kernel.org>2013-12-05 10:02:30 +0100
commitcf30d52e2d11523c42048ab89ed4215b5021526a (patch)
tree7377b27a7692d73a828e2ddbf9b33f661192f442 /arch/arm/mach-mmp
parent8ecffd7914484b728799dd31968f1339fae91593 (diff)
perf/x86: Fix constraint table end marker bug
The EVENT_CONSTRAINT_END() macro defines the end marker as a constraint with a weight of zero. This was all fine until we blacklisted the corrupting memory events on Intel IvyBridge. These events are blacklisted by using a counter bitmask of zero. Thus, they also get a constraint weight of zero. The iteration macro: for_each_constraint tests the weight==0. Therefore, it was stopping at the first blacklisted event, i.e., 0xd0. The corrupting events were therefore considered as unconstrained and were scheduled on any of the generic counters. This patch fixes the end marker to have a weight of -1. With this, the blacklisted events get an empty constraint and cannot be scheduled which is what we want for now. Signed-off-by: Maria Dimakopoulou <maria.n.dimakopoulou@gmail.com> Reviewed-by: Stephane Eranian <eranian@google.com> Cc: peterz@infradead.org Cc: ak@linux.intel.com Cc: jolsa@redhat.com Cc: zheng.z.yan@intel.com Link: http://lkml.kernel.org/r/20131204232437.GA10689@starlight Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/mach-mmp')
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