AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2025-01-19 12:16:38 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

tracing: Four small fixes

Browse Source 
- Fixed a ringbuffer bug for nested events having time go backwards
  - Fix a config dependency for boot time tracing to depend on synthetic
    events instead of histograms.
  - Fix trigger format parsing to handle multiple spaces
  - Fix bootconfig to handle failures in multiple events
 -----BEGIN PGP SIGNATURE-----
 
 iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCXvUjBBQccm9zdGVkdEBn
 b29kbWlzLm9yZwAKCRAp5XQQmuv6qmLiAQD47/1T01ilYeXqJ+EG235aeQssvRa7
 RSmIAoMP+V6kHQD9G2RjnWkb3BcrdNk9zoi0LpnuMl95m5OuaMzE4PPO+ws=
 =Zbx8
 -----END PGP SIGNATURE-----

Merge tag 'trace-v5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Four small fixes:

   - Fix a ringbuffer bug for nested events having time go backwards

   - Fix a config dependency for boot time tracing to depend on
     synthetic events instead of histograms.

   - Fix trigger format parsing to handle multiple spaces

   - Fix bootconfig to handle failures in multiple events"

* tag 'trace-v5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing/boottime: Fix kprobe multiple events
  tracing: Fix event trigger to accept redundant spaces
  tracing/boot: Fix config dependency for synthedic event
  ring-buffer: Zero out time extend if it is nested and not absolute
This commit is contained in:
Linus Torvalds 2020-06-25 16:16:49 -07:00
commit 42e9c85f5c
3 changed files with 27 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/trace/ring_buffer.c
View File

@ -2427,7 +2427,7 @@ rb_update_event(struct ring_buffer_per_cpu *cpu_buffer,
if (unlikely(info->add_timestamp)) {
bool abs = ring_buffer_time_stamp_abs(cpu_buffer->buffer);
event = rb_add_time_stamp(event, info->delta, abs);
event = rb_add_time_stamp(event, abs ? info->delta : delta, abs);
length -= RB_LEN_TIME_EXTEND;
delta = 0;
}

10
kernel/trace/trace_boot.c
View File

@ -101,12 +101,16 @@ trace_boot_add_kprobe_event(struct xbc_node *node, const char *event)
kprobe_event_cmd_init(&cmd, buf, MAX_BUF_LEN);
ret = kprobe_event_gen_cmd_start(&cmd, event, val);
if (ret)
if (ret) {
pr_err("Failed to generate probe: %s\n", buf);
break;
}
ret = kprobe_event_gen_cmd_end(&cmd);
if (ret)
if (ret) {
pr_err("Failed to add probe: %s\n", buf);
break;
}
}
return ret;
@ -120,7 +124,7 @@ trace_boot_add_kprobe_event(struct xbc_node *node, const char *event)
}
#endif
#ifdef CONFIG_HIST_TRIGGERS
#ifdef CONFIG_SYNTH_EVENTS
static int __init
trace_boot_add_synth_event(struct xbc_node *node, const char *event)
{

21
kernel/trace/trace_events_trigger.c
View File

@ -216,11 +216,17 @@ static int event_trigger_regex_open(struct inode *inode, struct file *file)
int trigger_process_regex(struct trace_event_file *file, char *buff)
{
char *command, *next = buff;
char *command, *next;
struct event_command *p;
int ret = -EINVAL;
next = buff = skip_spaces(buff);
command = strsep(&next, ": \t");
if (next) {
next = skip_spaces(next);
if (!*next)
next = NULL;
}
command = (command[0] != '!') ? command : command + 1;
mutex_lock(&trigger_cmd_mutex);
@ -630,8 +636,14 @@ event_trigger_callback(struct event_command *cmd_ops,
int ret;
/* separate the trigger from the filter (t:n [if filter]) */
if (param && isdigit(param[0]))
if (param && isdigit(param[0])) {
trigger = strsep(&param, " \t");
if (param) {
param = skip_spaces(param);
if (!*param)
param = NULL;
}
}
trigger_ops = cmd_ops->get_trigger_ops(cmd, trigger);
@ -1368,6 +1380,11 @@ int event_enable_trigger_func(struct event_command *cmd_ops,
trigger = strsep(&param, " \t");
if (!trigger)
return -EINVAL;
if (param) {
param = skip_spaces(param);
if (!*param)
param = NULL;
}
system = strsep(&trigger, ":");
if (!trigger)