diff mbox series

[RFC,21/32] function_graph: Expand the max reserved data size

Message ID 169920064470.482486.9772883857059976420.stgit@devnote2
State New
Headers
Series tracing: fprobe: function_graph: Multi-function graph and fprobe on fgraph |

Commit Message

Masami Hiramatsu (Google) Nov. 5, 2023, 4:10 p.m. UTC 
  From: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Expand the maximum reserved data size to 32 from 4. On 64bit system,
this will allow reserving 256 bytes on the ret_stack in maximum but
that may not happen.

Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---
 kernel/trace/fgraph.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c
index 0b8a1daef733..e7188c67356e 100644
--- a/kernel/trace/fgraph.c
+++ b/kernel/trace/fgraph.c
@@ -95,7 +95,7 @@  enum {
 #define FGRAPH_ARRAY_MASK	((1 << FGRAPH_ARRAY_SIZE) - 1)
 #define FGRAPH_ARRAY_SHIFT	(FGRAPH_TYPE_SHIFT + FGRAPH_TYPE_SIZE)
 
-#define FGRAPH_DATA_SIZE	2
+#define FGRAPH_DATA_SIZE	5
 #define FGRAPH_DATA_MASK	((1 << FGRAPH_DATA_SIZE) - 1)
 #define FGRAPH_DATA_SHIFT	(FGRAPH_TYPE_SHIFT + FGRAPH_TYPE_SIZE)
 
@@ -113,7 +113,7 @@  enum {
 
 #define RET_STACK(t, index) ((struct ftrace_ret_stack *)(&(t)->ret_stack[index]))
 
-#define FGRAPH_MAX_DATA_SIZE (sizeof(long) * 4)
+#define FGRAPH_MAX_DATA_SIZE (sizeof(long) * (1 << FGRAPH_DATA_SIZE))
 
 /*
  * Each fgraph_ops has a reservered unsigned long at the end (top) of the