Introduce unregister_/register_kprobes() for kprobe batch
registration. This can reduce waiting time for
synchronized_sched() when a lot of probes have to be
unregistered at once.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
---
I rewrote a patchset which had been discussed on LKML,
and simplified its interfaces.
http://lkml.org/lkml/2007/3/23/181
include/linux/kprobes.h | 9 +++
kernel/kprobes.c | 124 +++++++++++++++++++++++++++++++++---------------
2 files changed, 96 insertions(+), 37 deletions(-)
Index: 2.6.25-rc5-mm1/include/linux/kprobes.h
===================================================================
--- 2.6.25-rc5-mm1.orig/include/linux/kprobes.h
+++ 2.6.25-rc5-mm1/include/linux/kprobes.h
@@ -234,6 +234,8 @@ static inline struct kprobe_ctlblk *get_
int register_kprobe(struct kprobe *p);
void unregister_kprobe(struct kprobe *p);
+int register_kprobes(struct kprobe **kps, int num);
+void unregister_kprobes(struct kprobe **kps, int num);
int setjmp_pre_handler(struct kprobe *, struct pt_regs *);
int longjmp_break_handler(struct kprobe *, struct pt_regs *);
int register_jprobe(struct jprobe *p);
@@ -261,9 +263,16 @@ static inline int register_kprobe(struct
{
return -ENOSYS;
}
+static inline int register_kprobes(struct kprobe **kps, int num)
+{
+ return -ENOSYS;
+}
static inline void unregister_kprobe(struct kprobe *p)
{
}
+static inline void unregister_kprobes(struct kprobe **kps, int num)
+{
+}
static inline int register_jprobe(struct jprobe *p)
{
return -ENOSYS;
Index: 2.6.25-rc5-mm1/kernel/kprobes.c
===================================================================
--- 2.6.25-rc5-mm1.orig/kernel/kprobes.c
+++ 2.6.25-rc5-mm1/kernel/kprobes.c
@@ -580,6 +580,7 @@ static int __kprobes __register_kprobe(s
}
p->nmissed = 0;
+ INIT_LIST_HEAD(&p->list);
mutex_lock(&kprobe_mutex);
old_p = get_kprobe(p->addr);
if (old_p) {
@@ -606,35 +607,28 @@ out:
return ret;
}
-int __...
