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From:   Wang Wensheng <wangwensheng4@huawei.com>
To:     <linux-kernel@vger.kernel.org>, <rostedt@goodmis.org>,
        <mhiramat@kernel.org>, <mark.rutland@arm.com>
CC:     <xuqiang36@huawei.com>, <weiyongjun1@huawei.com>,
        <wangwensheng4@huawei.com>
Subject: [PATCH -next 2/3] ftrace: Optimize the allocation for mcount entries
Date:   Wed, 9 Nov 2022 09:44:33 +0000
Message-ID: <20221109094434.84046-3-wangwensheng4@huawei.com>
In-Reply-To: <20221109094434.84046-1-wangwensheng4@huawei.com>
References: <20221109094434.84046-1-wangwensheng4@huawei.com>
MIME-Version: 1.0
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Precedence: bulk

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.

Signed-off-by: Wang Wensheng <wangwensheng4@huawei.com>
---
 kernel/trace/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index c571c2813c11..43a958b28022 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3200,7 +3200,7 @@ 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;
 	}
 
-- 
2.17.1