Re: [PATCH 1/3] perf: convert perf_event_context.refcount to refcount_t

2019-02-01 Thread Mark Rutland
On Fri, Feb 01, 2019 at 03:44:38PM +, Reshetova, Elena wrote: > > On Tue, Jan 29, 2019 at 01:55:32PM +, Reshetova, Elena wrote: > > > > On Mon, Jan 28, 2019 at 02:27:26PM +0200, Elena Reshetova wrote: > > > > > diff --git a/kernel/events/core.c b/kernel/events/core.c > > > > > index 3cd13a3

RE: [PATCH 1/3] perf: convert perf_event_context.refcount to refcount_t

2019-02-01 Thread Reshetova, Elena
> On Tue, Jan 29, 2019 at 01:55:32PM +, Reshetova, Elena wrote: > > > On Mon, Jan 28, 2019 at 02:27:26PM +0200, Elena Reshetova wrote: > > > > diff --git a/kernel/events/core.c b/kernel/events/core.c > > > > index 3cd13a3..a1e87d2 100644 > > > > --- a/kernel/events/core.c > > > > +++ b/kernel/e

Re: [PATCH 1/3] perf: convert perf_event_context.refcount to refcount_t

2019-02-01 Thread Mark Rutland
On Tue, Jan 29, 2019 at 01:55:32PM +, Reshetova, Elena wrote: > > On Mon, Jan 28, 2019 at 02:27:26PM +0200, Elena Reshetova wrote: > > > diff --git a/kernel/events/core.c b/kernel/events/core.c > > > index 3cd13a3..a1e87d2 100644 > > > --- a/kernel/events/core.c > > > +++ b/kernel/events/core.c

Re: [PATCH 1/3] perf: convert perf_event_context.refcount to refcount_t

2019-01-30 Thread Peter Zijlstra
On Tue, Jan 29, 2019 at 01:55:32PM +, Reshetova, Elena wrote: > > On Mon, Jan 28, 2019 at 02:27:26PM +0200, Elena Reshetova wrote: > > > diff --git a/kernel/events/core.c b/kernel/events/core.c > > > index 3cd13a3..a1e87d2 100644 > > > --- a/kernel/events/core.c > > > +++ b/kernel/events/core.c

RE: [PATCH 1/3] perf: convert perf_event_context.refcount to refcount_t

2019-01-29 Thread Reshetova, Elena
> On Mon, Jan 28, 2019 at 02:27:26PM +0200, Elena Reshetova wrote: > > diff --git a/kernel/events/core.c b/kernel/events/core.c > > index 3cd13a3..a1e87d2 100644 > > --- a/kernel/events/core.c > > +++ b/kernel/events/core.c > > @@ -1171,7 +1171,7 @@ static void perf_event_ctx_deactivate(struct > pe

Re: [PATCH 1/3] perf: convert perf_event_context.refcount to refcount_t

2019-01-29 Thread Peter Zijlstra
On Mon, Jan 28, 2019 at 02:27:26PM +0200, Elena Reshetova wrote: > diff --git a/kernel/events/core.c b/kernel/events/core.c > index 3cd13a3..a1e87d2 100644 > --- a/kernel/events/core.c > +++ b/kernel/events/core.c > @@ -1171,7 +1171,7 @@ static void perf_event_ctx_deactivate(struct > perf_event_co

[PATCH 1/3] perf: convert perf_event_context.refcount to refcount_t

2019-01-28 Thread Elena Reshetova
atomic_t variables are currently used to implement reference counters with the following properties: - counter is initialized to 1 using atomic_set() - a resource is freed upon counter reaching zero - once counter reaches zero, its further increments aren't allowed - counter schema uses basi