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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-05-23 18:29:00 +0200
committerIngo Molnar <mingo@elte.hu>2009-05-24 08:24:08 +0200
commit082ff5a2767a0679ee543f14883adbafb631ffbe (patch)
tree5ddf792ed3f80b17bc427edea1dc1d4b4303b4f6 /include
parentaa9c67f53d1969cf1db4c9c2db3a78c4ceb96469 (diff)
downloadlinux-082ff5a2767a0679ee543f14883adbafb631ffbe.tar.gz
perf_counter: Change pctrl() behaviour
Instead of en/dis-abling all counters acting on a particular task, en/dis- able all counters we created. [ v2: fix crash on first counter enable ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: John Kacur <jkacur@redhat.com> LKML-Reference: <20090523163012.916937244@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/init_task.h10
-rw-r--r--include/linux/perf_counter.h3
-rw-r--r--include/linux/sched.h2
3 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index d87247d2641f..353c0ac7723a 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -108,6 +108,15 @@ extern struct group_info init_groups;
extern struct cred init_cred;
+#ifdef CONFIG_PERF_COUNTERS
+# define INIT_PERF_COUNTERS(tsk) \
+ .perf_counter_mutex = \
+ __MUTEX_INITIALIZER(tsk.perf_counter_mutex), \
+ .perf_counter_list = LIST_HEAD_INIT(tsk.perf_counter_list),
+#else
+# define INIT_PERF_COUNTERS(tsk)
+#endif
+
/*
* INIT_TASK is used to set up the first task table, touch at
* your own risk!. Base=0, limit=0x1fffff (=2MB)
@@ -171,6 +180,7 @@ extern struct cred init_cred;
}, \
.dirties = INIT_PROP_LOCAL_SINGLE(dirties), \
INIT_IDS \
+ INIT_PERF_COUNTERS(tsk) \
INIT_TRACE_IRQFLAGS \
INIT_LOCKDEP \
INIT_FTRACE_GRAPH \
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 4ab8050eb9e8..4159ee5940f8 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -469,6 +469,9 @@ struct perf_counter {
int oncpu;
int cpu;
+ struct list_head owner_entry;
+ struct task_struct *owner;
+
/* mmap bits */
struct mutex mmap_mutex;
atomic_t mmap_count;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9714d450f417..bc9326dcdde1 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1389,6 +1389,8 @@ struct task_struct {
#endif
#ifdef CONFIG_PERF_COUNTERS
struct perf_counter_context *perf_counter_ctxp;
+ struct mutex perf_counter_mutex;
+ struct list_head perf_counter_list;
#endif
#ifdef CONFIG_NUMA
struct mempolicy *mempolicy;