From nobody Mon Feb 9 00:20:19 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC393211712 for ; Thu, 6 Mar 2025 15:26:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741274777; cv=none; b=nkS1UaX6Sk7P9LDxWm12Ctzr46IuHSl0PrWZDK6jHjSC6KcJhgT7AJ/MioNPwEbJ62fASLXFQo2qCZF/q8KQo3nKLbrvGBNMAO6JlcAVUvCin+yplfxLDOCRC1ae50gCI4MT+qec76LyXvKOWrEtXAK9+18nAil+axozVOJZFSs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741274777; c=relaxed/simple; bh=pwFEfRdozJm4g7+EyIWH83XcpgWwdPgvIhLl+JzbiAw=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=ZkO/ax8S2M50qlmsw8j6flXwONhlQO4cx6E9wYdq5XAnXmEK1BzviuRR8JZoAKLIuHtRAgQGdVbfzw+0B8YJVWqfgoO66rU27OY94+W3kA0vk4GXFHRmz1KlxJEUIAyMSDtiwWXrfE8EQPEK+1XNNW0KF7WdRTTI9LeDTwQuFBw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3AA39C4CEE4; Thu, 6 Mar 2025 15:26:17 +0000 (UTC) Received: from rostedt by gandalf with local (Exim 4.98) (envelope-from ) id 1tqD74-00000000MbL-2HhC; Thu, 06 Mar 2025 10:26:18 -0500 Message-ID: <20250306152618.395640284@goodmis.org> User-Agent: quilt/0.68 Date: Thu, 06 Mar 2025 10:25:50 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Feng Yang Subject: [for-next][PATCH 02/10] ring-buffer: Fix bytes_dropped calculation issue References: <20250306152548.763044302@goodmis.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Feng Yang The calculation of bytes-dropped and bytes_dropped_nested is reversed. Although it does not affect the final calculation of total_dropped, it should still be modified. Link: https://lore.kernel.org/20250223070106.6781-1-yangfeng59949@163.com Fixes: 6c43e554a2a5 ("ring-buffer: Add ring buffer startup selftest") Signed-off-by: Feng Yang Signed-off-by: Steven Rostedt (Google) --- kernel/trace/ring_buffer.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 87caf9d48edb..7b6bd1f3daf4 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -7446,9 +7446,9 @@ static __init int rb_write_something(struct rb_test_d= ata *data, bool nested) /* Ignore dropped events before test starts. */ if (started) { if (nested) - data->bytes_dropped +=3D len; - else data->bytes_dropped_nested +=3D len; + else + data->bytes_dropped +=3D len; } return len; } --=20 2.47.2