From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx192.postini.com [74.125.245.192]) by kanga.kvack.org (Postfix) with SMTP id 1CE8A6B00F3 for ; Thu, 3 May 2012 10:24:45 -0400 (EDT) From: 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> 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: owner-linux-mm@kvack.org List-ID: To: linux-mmc@vger.kernel.org, cjb@laptop.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-omap@vger.kernel.org Cc: linux-kernel@vger.kernel.org, arnd.bergmann@linaro.org, alex.lemberg@sandisk.com, ilan.smith@sandisk.com, lporzio@micron.com, rmk+kernel@arm.linux.org.uk, Venkatraman S 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org