[tip:perfcounters/core] perf_counter: fix warning & lockup
From: tip-bot for Ingo Molnar
Date: Mon May 25 2009 - 16:08:44 EST
Commit-ID: 0127c3ea082ee9f1034789b978dfc7fd83254617
Gitweb: http://git.kernel.org/tip/0127c3ea082ee9f1034789b978dfc7fd83254617
Author: Ingo Molnar <mingo@xxxxxxx>
AuthorDate: Mon, 25 May 2009 22:03:26 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Mon, 25 May 2009 22:02:23 +0200
perf_counter: fix warning & lockup
- remove bogus warning
- fix wakeup from NMI path lockup
- also fix up whitespace noise in perf_counter.h
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: John Kacur <jkacur@xxxxxxxxxx>
LKML-Reference: <20090525153931.703093461@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
include/linux/perf_counter.h | 78 +++++++++++++++++++++---------------------
kernel/perf_counter.c | 4 +--
2 files changed, 40 insertions(+), 42 deletions(-)
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index e3a7585..2b16ed3 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -73,7 +73,7 @@ enum sw_event_ids {
PERF_SW_EVENTS_MAX = 7,
};
-#define __PERF_COUNTER_MASK(name) \
+#define __PERF_COUNTER_MASK(name) \
(((1ULL << PERF_COUNTER_##name##_BITS) - 1) << \
PERF_COUNTER_##name##_SHIFT)
@@ -98,14 +98,14 @@ enum sw_event_ids {
* in the overflow packets.
*/
enum perf_counter_record_format {
- PERF_RECORD_IP = 1U << 0,
- PERF_RECORD_TID = 1U << 1,
- PERF_RECORD_TIME = 1U << 2,
- PERF_RECORD_ADDR = 1U << 3,
- PERF_RECORD_GROUP = 1U << 4,
- PERF_RECORD_CALLCHAIN = 1U << 5,
- PERF_RECORD_CONFIG = 1U << 6,
- PERF_RECORD_CPU = 1U << 7,
+ PERF_RECORD_IP = 1U << 0,
+ PERF_RECORD_TID = 1U << 1,
+ PERF_RECORD_TIME = 1U << 2,
+ PERF_RECORD_ADDR = 1U << 3,
+ PERF_RECORD_GROUP = 1U << 4,
+ PERF_RECORD_CALLCHAIN = 1U << 5,
+ PERF_RECORD_CONFIG = 1U << 6,
+ PERF_RECORD_CPU = 1U << 7,
};
/*
@@ -235,13 +235,13 @@ enum perf_event_type {
* correlate userspace IPs to code. They have the following structure:
*
* struct {
- * struct perf_event_header header;
+ * struct perf_event_header header;
*
- * u32 pid, tid;
- * u64 addr;
- * u64 len;
- * u64 pgoff;
- * char filename[];
+ * u32 pid, tid;
+ * u64 addr;
+ * u64 len;
+ * u64 pgoff;
+ * char filename[];
* };
*/
PERF_EVENT_MMAP = 1,
@@ -249,27 +249,27 @@ enum perf_event_type {
/*
* struct {
- * struct perf_event_header header;
+ * struct perf_event_header header;
*
- * u32 pid, tid;
- * char comm[];
+ * u32 pid, tid;
+ * char comm[];
* };
*/
PERF_EVENT_COMM = 3,
/*
* struct {
- * struct perf_event_header header;
- * u64 time;
- * u64 irq_period;
+ * struct perf_event_header header;
+ * u64 time;
+ * u64 irq_period;
* };
*/
PERF_EVENT_PERIOD = 4,
/*
* struct {
- * struct perf_event_header header;
- * u64 time;
+ * struct perf_event_header header;
+ * u64 time;
* };
*/
PERF_EVENT_THROTTLE = 5,
@@ -280,23 +280,23 @@ enum perf_event_type {
* will be PERF_RECORD_*
*
* struct {
- * struct perf_event_header header;
+ * struct perf_event_header header;
*
- * { u64 ip; } && PERF_RECORD_IP
- * { u32 pid, tid; } && PERF_RECORD_TID
- * { u64 time; } && PERF_RECORD_TIME
- * { u64 addr; } && PERF_RECORD_ADDR
- * { u64 config; } && PERF_RECORD_CONFIG
- * { u32 cpu, res; } && PERF_RECORD_CPU
+ * { u64 ip; } && PERF_RECORD_IP
+ * { u32 pid, tid; } && PERF_RECORD_TID
+ * { u64 time; } && PERF_RECORD_TIME
+ * { u64 addr; } && PERF_RECORD_ADDR
+ * { u64 config; } && PERF_RECORD_CONFIG
+ * { u32 cpu, res; } && PERF_RECORD_CPU
*
- * { u64 nr;
- * { u64 event, val; } cnt[nr]; } && PERF_RECORD_GROUP
+ * { u64 nr;
+ * { u64 event, val; } cnt[nr]; } && PERF_RECORD_GROUP
*
- * { u16 nr,
- * hv,
- * kernel,
- * user;
- * u64 ips[nr]; } && PERF_RECORD_CALLCHAIN
+ * { u16 nr,
+ * hv,
+ * kernel,
+ * user;
+ * u64 ips[nr]; } && PERF_RECORD_CALLCHAIN
* };
*/
};
@@ -406,7 +406,7 @@ struct perf_mmap_data {
atomic_t wakeup; /* needs a wakeup */
struct perf_counter_mmap_page *user_page;
- void *data_pages[0];
+ void *data_pages[0];
};
struct perf_pending_entry {
@@ -422,7 +422,7 @@ struct perf_counter {
struct list_head list_entry;
struct list_head event_entry;
struct list_head sibling_list;
- int nr_siblings;
+ int nr_siblings;
struct perf_counter *group_leader;
const struct pmu *pmu;
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index ec9c400..070f92d 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -2576,7 +2576,7 @@ static void perf_log_throttle(struct perf_counter *counter, int enable)
.time = sched_clock(),
};
- ret = perf_output_begin(&handle, counter, sizeof(throttle_event), 0, 0);
+ ret = perf_output_begin(&handle, counter, sizeof(throttle_event), 1, 0);
if (ret)
return;
@@ -3449,8 +3449,6 @@ void perf_counter_exit_task(struct task_struct *child)
struct perf_counter_context *child_ctx;
unsigned long flags;
- WARN_ON_ONCE(child != current);
-
child_ctx = child->perf_counter_ctxp;
if (likely(!child_ctx))
--
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