perf/core: Drop PERF_EVENT_TXN
authorSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Fri, 4 Sep 2015 03:07:53 +0000 (20:07 -0700)
committerIngo Molnar <mingo@kernel.org>
Sun, 13 Sep 2015 09:27:30 +0000 (11:27 +0200)
commit8f3e5684d3fbd91ead283916676fa3dac22615e5
treee59407b8578f7dc67e25c9acc6f4633d3b45bedf
parent88a486132dffeb010d659e00361c4d114de09972
perf/core: Drop PERF_EVENT_TXN

We currently use PERF_EVENT_TXN flag to determine if we are in the middle
of a transaction. If in a transaction, we defer the schedulability checks
from pmu->add() operation to the pmu->commit() operation.

Now that we have "transaction types" (PERF_PMU_TXN_ADD, PERF_PMU_TXN_READ)
we can use the type to determine if we are in a transaction and drop the
PERF_EVENT_TXN flag.

When PERF_EVENT_TXN is dropped, the cpuhw->group_flag on some architectures
becomes unused, so drop that field as well.

This is an extension of the Powerpc patch from Peter Zijlstra to s390,
Sparc and x86 architectures.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/1441336073-22750-11-git-send-email-sukadev@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/powerpc/perf/core-book3s.c
arch/s390/kernel/perf_cpum_cf.c
arch/sparc/kernel/perf_event.c
arch/x86/kernel/cpu/perf_event.c
arch/x86/kernel/cpu/perf_event.h
include/linux/perf_event.h