Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932241Ab2ECO2P (ORCPT ); Thu, 3 May 2012 10:28:15 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:53883 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932115Ab2ECOZB (ORCPT ); Thu, 3 May 2012 10:25:01 -0400 From: Venkatraman S To: , , , , CC: , , , , , , Venkatraman S Subject: [PATCH v2 13/16] mmc: Documentation: Add sysfs ABI for hpi_time_threshold Date: Thu, 3 May 2012 19:53:12 +0530 Message-ID: <1336054995-22988-14-git-send-email-svenkatr@ti.com> X-Mailer: git-send-email 1.7.10.rc2 In-Reply-To: <1336054995-22988-1-git-send-email-svenkatr@ti.com> References: <1336054995-22988-1-git-send-email-svenkatr@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1569 Lines: 37 hpi_time_threshold can be set to configure elapsed time in ms, after which an ongoing request will not be preempted. Explain the hpi_time_threhold parameter for MMC devices. Signed-off-by: Venkatraman S --- Documentation/ABI/testing/sysfs-devices-mmc | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-devices-mmc b/Documentation/ABI/testing/sysfs-devices-mmc index 5a50ab6..133dba5 100644 --- a/Documentation/ABI/testing/sysfs-devices-mmc +++ b/Documentation/ABI/testing/sysfs-devices-mmc @@ -19,3 +19,15 @@ Description: is enabled, this attribute will indicate the size of enhanced data area. If not, this attribute will be -EINVAL. Unit KByte. Format decimal. + +What: /sys/devices/.../mmc_host/mmcX/mmcX:XXXX/hpi_time_threshold +Date: April 2012 +Contact: Venkatraman S +Description: + High Priority Interrupt is a new feature defined in eMMC4.4 + standard. If this feature is enabled, stack needs to decide + till what time since the last issued request is considered + preemptible. This attribute value (in milliseconds) is + used for arriving at the most optimal value for a specific + card. Default is zero, which also disables the feature, as + the request becomes non-preemptible immediately. -- 1.7.10.rc2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/