• Sukadev Bhattiprolu's avatar
    perf/core: Drop PERF_EVENT_TXN · 8f3e5684
    Sukadev Bhattiprolu authored
    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: default avatarSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
    Signed-off-by: default avatarPeter 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.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    8f3e5684
perf_cpum_cf.c 18.2 KB