From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751733AbcGVEQ7 (ORCPT ); Fri, 22 Jul 2016 00:16:59 -0400 Received: from mga04.intel.com ([192.55.52.120]:40108 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751088AbcGVEQ4 (ORCPT ); Fri, 22 Jul 2016 00:16:56 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,403,1464678000"; d="scan'208";a="1021742450" From: Lv Zheng To: "Rafael J. Wysocki" , "Rafael J. Wysocki" , Len Brown Cc: Lv Zheng , Lv Zheng , , linux-acpi@vger.kernel.org Subject: [PATCH v3 0/3] ACPI / debugger: Add kernel flushing support Date: Fri, 22 Jul 2016 12:16:49 +0800 Message-Id: X-Mailer: git-send-email 1.7.10 In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org AML debugger is implemented in the kernel as a character device located in the debugfs. Currently, when its batch mode is used, the userspace tool needs to flush the logs/prompts remained in the kernel output buffer, this is implemented in an inefficient way in the userspace by polling the IO and reading everything out. This patch introduces a kernel space flushing support, so that userspace can invoke ioctl() to put the driver into a state waiting for new commands, all kernel space logs/prompts will be automatically discarded by ioctl(). Lv Zheng (3): ACPI / debugger: Add kernel flushing support tools/power/acpi/acpidbg: Use new flushing mechanism tools/power/acpi/acpidbg: Add multi-commands support in batch mode drivers/acpi/acpi_dbg.c | 85 +++++++++++++++++++++-- include/linux/acpi.h | 1 + include/uapi/linux/acpi-ioctls.h | 21 ++++++ tools/power/acpi/tools/acpidbg/acpidbg.c | 110 +++++++++++++++++------------- 4 files changed, 165 insertions(+), 52 deletions(-) create mode 100644 include/uapi/linux/acpi-ioctls.h -- 1.7.10