diff options
| -rw-r--r-- | kernel/trace/ring_buffer.c | 19 | ||||
| -rw-r--r-- | kernel/trace/trace.c | 6 | ||||
| -rw-r--r-- | tools/perf/builtin-annotate.c | 2 | ||||
| -rw-r--r-- | tools/perf/builtin-top.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/debug.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/newt.c | 1 | ||||
| -rw-r--r-- | tools/perf/util/symbol.c | 27 | ||||
| -rw-r--r-- | tools/perf/util/symbol.h | 2 |
8 files changed, 45 insertions, 16 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 7f6059c5aa9..1da7b6ea8b8 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -1768,6 +1768,14 @@ rb_reset_tail(struct ring_buffer_per_cpu *cpu_buffer, * must fill the old tail_page with padding. */ if (tail >= BUF_PAGE_SIZE) { + /* + * If the page was filled, then we still need + * to update the real_end. Reset it to zero + * and the reader will ignore it. + */ + if (tail == BUF_PAGE_SIZE) + tail_page->real_end = 0; + local_sub(length, &tail_page->write); return; } @@ -3894,12 +3902,12 @@ int ring_buffer_read_page(struct ring_buffer *buffer, ret = read; cpu_buffer->lost_events = 0; + + commit = local_read(&bpage->commit); /* * Set a flag in the commit field if we lost events */ if (missed_events) { - commit = local_read(&bpage->commit); - /* If there is room at the end of the page to save the * missed events, then record it there. */ @@ -3907,10 +3915,17 @@ int ring_buffer_read_page(struct ring_buffer *buffer, memcpy(&bpage->data[commit], &missed_events, sizeof(missed_events)); local_add(RB_MISSED_STORED, &bpage->commit); + commit += sizeof(missed_events); } local_add(RB_MISSED_EVENTS, &bpage->commit); } + /* + * This page may be off to user land. Zero it out here. + */ + if (commit < BUF_PAGE_SIZE) + memset(&bpage->data[commit], 0, BUF_PAGE_SIZE - commit); + out_unlock: spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags); diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 55e48511d7c..086d3631680 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3666,7 +3666,6 @@ tracing_buffers_read(struct file *filp, char __user *ubuf, size_t count, loff_t *ppos) { struct ftrace_buffer_info *info = filp->private_data; - unsigned int pos; ssize_t ret; size_t size; @@ -3693,11 +3692,6 @@ tracing_buffers_read(struct file *filp, char __user *ubuf, if (ret < 0) return 0; - pos = ring_buffer_page_len(info->spare); - - if (pos < PAGE_SIZE) - memset(info->spare + pos, 0, PAGE_SIZE - pos); - read: size = PAGE_SIZE - info->read; if (size > count) diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c index 08278eda31a..96db5248e99 100644 --- a/tools/perf/builtin-annotate.c +++ b/tools/perf/builtin-annotate.c @@ -343,7 +343,7 @@ find_next: continue; } - if (use_browser) { + if (use_browser > 0) { key = hist_entry__tui_annotate(he); if (is_exit_key(key)) break; diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 397290a0a76..a66f4272b99 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1060,7 +1060,7 @@ static void event__process_sample(const event_t *self, pr_err("Can't annotate %s", sym->name); if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) { pr_err(": No vmlinux file was found in the path:\n"); - vmlinux_path__fprintf(stderr); + machine__fprintf_vmlinux_path(machine, stderr); } else pr_err(".\n"); exit(1); diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c index dd824cf3b62..6cddff2bc97 100644 --- a/tools/perf/util/debug.c +++ b/tools/perf/util/debug.c @@ -22,7 +22,7 @@ int eprintf(int level, const char *fmt, ...) if (verbose >= level) { va_start(args, fmt); - if (use_browser) + if (use_browser > 0) ret = browser__show_help(fmt, args); else ret = vfprintf(stderr, fmt, args); diff --git a/tools/perf/util/newt.c b/tools/perf/util/newt.c index d54c540f49d..cf182ca132f 100644 --- a/tools/perf/util/newt.c +++ b/tools/perf/util/newt.c @@ -1139,6 +1139,7 @@ void setup_browser(void) struct newtPercentTreeColors *c = &defaultPercentTreeColors; if (!isatty(1) || !use_browser || dump_trace) { + use_browser = 0; setup_pager(); return; } diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index aaa51ba147d..7fd6b151feb 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1695,9 +1695,20 @@ int dso__load_vmlinux_path(struct dso *self, struct map *map, symbol_filter_t filter) { int i, err = 0; + char *filename; pr_debug("Looking at the vmlinux_path (%d entries long)\n", - vmlinux_path__nr_entries); + vmlinux_path__nr_entries + 1); + + filename = dso__build_id_filename(self, NULL, 0); + if (filename != NULL) { + err = dso__load_vmlinux(self, map, filename, filter); + if (err > 0) { + dso__set_long_name(self, filename); + goto out; + } + free(filename); + } for (i = 0; i < vmlinux_path__nr_entries; ++i) { err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); @@ -1706,7 +1717,7 @@ int dso__load_vmlinux_path(struct dso *self, struct map *map, break; } } - +out: return err; } @@ -2102,13 +2113,21 @@ out_fail: return -1; } -size_t vmlinux_path__fprintf(FILE *fp) +size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp) { int i; size_t printed = 0; + struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso; + + if (kdso->has_build_id) { + char filename[PATH_MAX]; + if (dso__build_id_filename(kdso, filename, sizeof(filename))) + printed += fprintf(fp, "[0] %s\n", filename); + } for (i = 0; i < vmlinux_path__nr_entries; ++i) - printed += fprintf(fp, "[%d] %s\n", i, vmlinux_path[i]); + printed += fprintf(fp, "[%d] %s\n", + i + kdso->has_build_id, vmlinux_path[i]); return printed; } diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 5d25b5eb145..5e02d2c1715 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -216,6 +216,6 @@ int machines__create_guest_kernel_maps(struct rb_root *self); int symbol__init(void); bool symbol_type__is_a(char symbol_type, enum map_type map_type); -size_t vmlinux_path__fprintf(FILE *fp); +size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp); #endif /* __PERF_SYMBOL */ |