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Merge branch 'perf/urgent' into perf/core, to pick up dependencies 

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2016-08-18 10:36:21 +02:00
parent bdfaa2eecd 71e7bc2bab
commit 8942c2b7f3
1 changed files with 68 additions and 27 deletions
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95
kernel/events/core.c
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@ -242,18 +242,6 @@ unlock:
return ret;
}
static void event_function_local(struct perf_event *event, event_f func, void *data)
{
struct event_function_struct efs = {
.event = event,
.func = func,
.data = data,
};
int ret = event_function(&efs);
WARN_ON_ONCE(ret);
}
static void event_function_call(struct perf_event *event, event_f func, void *data)
{
struct perf_event_context *ctx = event->ctx;
@ -303,6 +291,54 @@ again:
raw_spin_unlock_irq(&ctx->lock);
}
/*
* Similar to event_function_call() + event_function(), but hard assumes IRQs
* are already disabled and we're on the right CPU.
*/
static void event_function_local(struct perf_event *event, event_f func, void *data)
{
struct perf_event_context *ctx = event->ctx;
struct perf_cpu_context *cpuctx = __get_cpu_context(ctx);
struct task_struct *task = READ_ONCE(ctx->task);
struct perf_event_context *task_ctx = NULL;
WARN_ON_ONCE(!irqs_disabled());
if (task) {
if (task == TASK_TOMBSTONE)
return;
task_ctx = ctx;
}
perf_ctx_lock(cpuctx, task_ctx);
task = ctx->task;
if (task == TASK_TOMBSTONE)
goto unlock;
if (task) {
/*
* We must be either inactive or active and the right task,
* otherwise we're screwed, since we cannot IPI to somewhere
* else.
*/
if (ctx->is_active) {
if (WARN_ON_ONCE(task != current))
goto unlock;
if (WARN_ON_ONCE(cpuctx->task_ctx != ctx))
goto unlock;
}
} else {
WARN_ON_ONCE(&cpuctx->ctx != ctx);
}
func(event, cpuctx, ctx, data);
unlock:
perf_ctx_unlock(cpuctx, task_ctx);
}
#define PERF_FLAG_ALL (PERF_FLAG_FD_NO_GROUP |\
PERF_FLAG_FD_OUTPUT |\
PERF_FLAG_PID_CGROUP |\
@ -3524,9 +3560,10 @@ static int perf_event_read(struct perf_event *event, bool group)
.group = group,
.ret = 0,
};
smp_call_function_single(event->oncpu,
__perf_event_read, &data, 1);
ret = data.ret;
ret = smp_call_function_single(event->oncpu, __perf_event_read, &data, 1);
/* The event must have been read from an online CPU: */
WARN_ON_ONCE(ret);
ret = ret ? : data.ret;
} else if (event->state == PERF_EVENT_STATE_INACTIVE) {
struct perf_event_context *ctx = event->ctx;
unsigned long flags;
@ -6594,15 +6631,6 @@ got_name:
kfree(buf);
}
/*
* Whether this @filter depends on a dynamic object which is not loaded
* yet or its load addresses are not known.
*/
static bool perf_addr_filter_needs_mmap(struct perf_addr_filter *filter)
{
return filter->filter && filter->inode;
}
/*
* Check whether inode and address range match filter criteria.
*/
@ -6664,6 +6692,13 @@ static void perf_addr_filters_adjust(struct vm_area_struct *vma)
struct perf_event_context *ctx;
int ctxn;
/*
* Data tracing isn't supported yet and as such there is no need
* to keep track of anything that isn't related to executable code:
*/
if (!(vma->vm_flags & VM_EXEC))
return;
rcu_read_lock();
for_each_task_context_nr(ctxn) {
ctx = rcu_dereference(current->perf_event_ctxp[ctxn]);
@ -7816,7 +7851,11 @@ static void perf_event_addr_filters_apply(struct perf_event *event)
list_for_each_entry(filter, &ifh->list, entry) {
event->addr_filters_offs[count] = 0;
if (perf_addr_filter_needs_mmap(filter))
/*
* Adjust base offset if the filter is associated to a binary
* that needs to be mapped:
*/
if (filter->inode)
event->addr_filters_offs[count] =
perf_addr_filter_apply(filter, mm);
@ -7947,8 +7986,10 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
goto fail;
}
if (token == IF_SRC_FILE) {
filename = match_strdup(&args[2]);
if (token == IF_SRC_FILE || token == IF_SRC_FILEADDR) {
int fpos = filter->range ? 2 : 1;
filename = match_strdup(&args[fpos]);
if (!filename) {
ret = -ENOMEM;
goto fail;