diff options
| -rw-r--r-- | arch/x86/include/asm/pvclock.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/pvclock.c | 5 | ||||
| -rw-r--r-- | arch/x86/xen/time.c | 2 | ||||
| -rw-r--r-- | kernel/printk.c | 4 | ||||
| -rw-r--r-- | tools/perf/builtin-record.c | 6 | ||||
| -rw-r--r-- | tools/perf/util/header.c | 11 | ||||
| -rw-r--r-- | tools/perf/util/symbol.c | 59 |
7 files changed, 76 insertions, 12 deletions
diff --git a/arch/x86/include/asm/pvclock.h b/arch/x86/include/asm/pvclock.h index 7f7e577a0e39..31d84acc1512 100644 --- a/arch/x86/include/asm/pvclock.h +++ b/arch/x86/include/asm/pvclock.h @@ -11,6 +11,7 @@ unsigned long pvclock_tsc_khz(struct pvclock_vcpu_time_info *src); void pvclock_read_wallclock(struct pvclock_wall_clock *wall, struct pvclock_vcpu_time_info *vcpu, struct timespec *ts); +void pvclock_resume(void); /* * Scale a 64-bit delta by scaling and multiplying by a 32-bit fraction, diff --git a/arch/x86/kernel/pvclock.c b/arch/x86/kernel/pvclock.c index 008b91eefa18..42eb3300dfc6 100644 --- a/arch/x86/kernel/pvclock.c +++ b/arch/x86/kernel/pvclock.c @@ -83,6 +83,11 @@ unsigned long pvclock_tsc_khz(struct pvclock_vcpu_time_info *src) static atomic64_t last_value = ATOMIC64_INIT(0); +void pvclock_resume(void) +{ + atomic64_set(&last_value, 0); +} + cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src) { struct pvclock_shadow_time shadow; diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c index b2bb5aa3b054..5da5e53fb94c 100644 --- a/arch/x86/xen/time.c +++ b/arch/x86/xen/time.c @@ -426,6 +426,8 @@ void xen_timer_resume(void) { int cpu; + pvclock_resume(); + if (xen_clockevent != &xen_vcpuop_clockevent) return; diff --git a/kernel/printk.c b/kernel/printk.c index 9a2264fc42ca..a23315dc4498 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -1082,13 +1082,15 @@ void printk_tick(void) int printk_needs_cpu(int cpu) { + if (unlikely(cpu_is_offline(cpu))) + printk_tick(); return per_cpu(printk_pending, cpu); } void wake_up_klogd(void) { if (waitqueue_active(&log_wait)) - __raw_get_cpu_var(printk_pending) = 1; + this_cpu_write(printk_pending, 1); } /** diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index e2c2de201eec..564491fa18b2 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -197,7 +197,7 @@ static void sig_atexit(void) if (child_pid > 0) kill(child_pid, SIGTERM); - if (signr == -1) + if (signr == -1 || signr == SIGUSR1) return; signal(signr, SIG_DFL); @@ -515,6 +515,7 @@ static int __cmd_record(int argc, const char **argv) atexit(sig_atexit); signal(SIGCHLD, sig_handler); signal(SIGINT, sig_handler); + signal(SIGUSR1, sig_handler); if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { perror("failed to create pipes"); @@ -606,6 +607,7 @@ static int __cmd_record(int argc, const char **argv) execvp(argv[0], (char **)argv); perror(argv[0]); + kill(getppid(), SIGUSR1); exit(-1); } @@ -762,7 +764,7 @@ static int __cmd_record(int argc, const char **argv) } } - if (quiet) + if (quiet || signr == SIGUSR1) return 0; fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index d7e67b167ea3..64a85bafde63 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -946,11 +946,16 @@ perf_header__find_attr(u64 id, struct perf_header *header) /* * We set id to -1 if the data file doesn't contain sample - * ids. Check for this and avoid walking through the entire - * list of ids which may be large. + * ids. This can happen when the data file contains one type + * of event and in that case, the header can still store the + * event attribute information. Check for this and avoid + * walking through the entire list of ids which may be large. */ - if (id == -1ULL) + if (id == -1ULL) { + if (header->attrs > 0) + return &header->attr[0]->attr; return NULL; + } for (i = 0; i < header->attrs; i++) { struct perf_header_attr *attr = header->attr[i]; diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 0500895a45af..d628c8d1cf5e 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -532,7 +532,7 @@ static int dso__split_kallsyms(struct dso *self, struct map *map, struct machine *machine = kmaps->machine; struct map *curr_map = map; struct symbol *pos; - int count = 0; + int count = 0, moved = 0; struct rb_root *root = &self->symbols[map->type]; struct rb_node *next = rb_first(root); int kernel_range = 0; @@ -590,6 +590,11 @@ static int dso__split_kallsyms(struct dso *self, struct map *map, char dso_name[PATH_MAX]; struct dso *dso; + if (count == 0) { + curr_map = map; + goto filter_symbol; + } + if (self->kernel == DSO_TYPE_GUEST_KERNEL) snprintf(dso_name, sizeof(dso_name), "[guest.kernel].%d", @@ -615,7 +620,7 @@ static int dso__split_kallsyms(struct dso *self, struct map *map, map_groups__insert(kmaps, curr_map); ++kernel_range; } - +filter_symbol: if (filter && filter(curr_map, pos)) { discard_symbol: rb_erase(&pos->rb_node, root); symbol__delete(pos); @@ -623,8 +628,9 @@ discard_symbol: rb_erase(&pos->rb_node, root); if (curr_map != map) { rb_erase(&pos->rb_node, root); symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); - } - count++; + ++moved; + } else + ++count; } } @@ -634,7 +640,7 @@ discard_symbol: rb_erase(&pos->rb_node, root); dso__set_loaded(curr_map->dso, curr_map->type); } - return count; + return count + moved; } int dso__load_kallsyms(struct dso *self, const char *filename, @@ -2125,14 +2131,55 @@ static struct dso *machine__create_kernel(struct machine *self) return kernel; } +struct process_args { + u64 start; +}; + +static int symbol__in_kernel(void *arg, const char *name, + char type __used, u64 start) +{ + struct process_args *args = arg; + + if (strchr(name, '[')) + return 0; + + args->start = start; + return 1; +} + +/* Figure out the start address of kernel map from /proc/kallsyms */ +static u64 machine__get_kernel_start_addr(struct machine *machine) +{ + const char *filename; + char path[PATH_MAX]; + struct process_args args; + + if (machine__is_host(machine)) { + filename = "/proc/kallsyms"; + } else { + if (machine__is_default_guest(machine)) + filename = (char *)symbol_conf.default_guest_kallsyms; + else { + sprintf(path, "%s/proc/kallsyms", machine->root_dir); + filename = path; + } + } + + if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) + return 0; + + return args.start; +} + int __machine__create_kernel_maps(struct machine *self, struct dso *kernel) { enum map_type type; + u64 start = machine__get_kernel_start_addr(self); for (type = 0; type < MAP__NR_TYPES; ++type) { struct kmap *kmap; - self->vmlinux_maps[type] = map__new2(0, kernel, type); + self->vmlinux_maps[type] = map__new2(start, kernel, type); if (self->vmlinux_maps[type] == NULL) return -1; |