ftrace: Optimize the allocation for mcount entries

commit bcea02b096333dc74af987cb9685a4dbdd820840 upstream. If we can't allocate this size, try something smaller with half of the size. Its order should be decreased by one instead of divided by two. Link: https://lkml.kernel.org/r/[email protected] Cc: <[email protected]> Cc: <[email protected]> Cc: [email protected] Fixes: a790087 ("ftrace: Allocate the mcount record pages as groups") Signed-off-by: Wang Wensheng <[email protected]> Signed-off-by: Steven Rostedt (Google) <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
saikiran2001 · Nov 25, 2022 · c50e0bc · c50e0bc
1 parent 3041fee
commit c50e0bc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
@@ -3017,7 +3017,7 @@ static int ftrace_allocate_records(struct ftrace_page *pg, int count)
 		/* if we can't allocate this size, try something smaller */
 		if (!order)
 			return -ENOMEM;
-		order >>= 1;
+		order--;
 		goto again;
 	}