diff options
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index c98e3b3386ba..c3df411a2684 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -17,6 +17,7 @@ #include <linux/string.h> #include <linux/rculist.h> #include <linux/filter.h> +#include <linux/percpu.h> #include "trace_dynevent.h" #include "trace_probe.h" @@ -62,7 +63,7 @@ struct trace_uprobe { char *filename; unsigned long offset; unsigned long ref_ctr_offset; - unsigned long nhit; + unsigned long __percpu *nhits; struct trace_probe tp; }; @@ -337,6 +338,12 @@ alloc_trace_uprobe(const char *group, const char *event, int nargs, bool is_ret) if (!tu) return ERR_PTR(-ENOMEM); + tu->nhits = alloc_percpu(unsigned long); + if (!tu->nhits) { + ret = -ENOMEM; + goto error; + } + ret = trace_probe_init(&tu->tp, event, group, true, nargs); if (ret < 0) goto error; @@ -349,6 +356,7 @@ alloc_trace_uprobe(const char *group, const char *event, int nargs, bool is_ret) return tu; error: + free_percpu(tu->nhits); kfree(tu); return ERR_PTR(ret); @@ -362,6 +370,7 @@ static void free_trace_uprobe(struct trace_uprobe *tu) path_put(&tu->path); trace_probe_cleanup(&tu->tp); kfree(tu->filename); + free_percpu(tu->nhits); kfree(tu); } @@ -815,13 +824,21 @@ static int probes_profile_seq_show(struct seq_file *m, void *v) { struct dyn_event *ev = v; struct trace_uprobe *tu; + unsigned long nhits; + int cpu; if (!is_trace_uprobe(ev)) return 0; tu = to_trace_uprobe(ev); + + nhits = 0; + for_each_possible_cpu(cpu) { + nhits += per_cpu(*tu->nhits, cpu); + } + seq_printf(m, " %s %-44s %15lu\n", tu->filename, - trace_probe_name(&tu->tp), tu->nhit); + trace_probe_name(&tu->tp), nhits); return 0; } @@ -1512,7 +1529,8 @@ static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs) int ret = 0; tu = container_of(con, struct trace_uprobe, consumer); - tu->nhit++; + + this_cpu_inc(*tu->nhits); udd.tu = tu; udd.bp_addr = instruction_pointer(regs); |