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Add vmalloc sync all calls in ftrace and kprobes modules
[lttng-modules.git]
/
probes
/
lttng-kprobes.c
diff --git
a/probes/lttng-kprobes.c
b/probes/lttng-kprobes.c
index 9d9fb5b9a759fd6445f70478c907657736f1f082..daef3600feefd580bb0db79357d09428f8eb21eb 100644
(file)
--- a/
probes/lttng-kprobes.c
+++ b/
probes/lttng-kprobes.c
@@
-12,6
+12,7
@@
#include <linux/slab.h>
#include "../ltt-events.h"
#include "../wrapper/ringbuffer/frontend_types.h"
#include <linux/slab.h>
#include "../ltt-events.h"
#include "../wrapper/ringbuffer/frontend_types.h"
+#include "../wrapper/vmalloc.h"
#include "../ltt-tracer.h"
static
#include "../ltt-tracer.h"
static
@@
-101,6
+102,14
@@
int lttng_kprobes_register(const char *name,
event->u.kprobe.symbol_name;
event->u.kprobe.kp.offset = offset;
event->u.kprobe.kp.addr = (void *) addr;
event->u.kprobe.symbol_name;
event->u.kprobe.kp.offset = offset;
event->u.kprobe.kp.addr = (void *) addr;
+
+ /*
+ * Ensure the memory we just allocated don't trigger page faults.
+ * Well.. kprobes itself puts the page fault handler on the blacklist,
+ * but we can never be too careful.
+ */
+ wrapper_vmalloc_sync_all();
+
ret = register_kprobe(&event->u.kprobe.kp);
if (ret)
goto register_error;
ret = register_kprobe(&event->u.kprobe.kp);
if (ret)
goto register_error;
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