From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753500Ab1H2KLv (ORCPT ); Mon, 29 Aug 2011 06:11:51 -0400 Received: from mailout3.samsung.com ([203.254.224.33]:45779 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753387Ab1H2KLo (ORCPT ); Mon, 29 Aug 2011 06:11:44 -0400 X-AuditID: cbfee61a-b7cf1ae00000208e-1b-4e5b65dfd959 Date: Mon, 29 Aug 2011 19:11:18 +0900 From: Jaehoon Chung Subject: Re: [RFC PATCH v2] support ioctl for tunable user request In-reply-to: To: Lin Ming Cc: "linux-kernel@vger.kernel.org" , Jens Axboe , Arnd Bergmann , Kyungmin Park Message-id: <4E5B65C6.6070300@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 7BIT User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; ko; rv:1.9.2.4) Gecko/20100608 Thunderbird/3.1 References: <4E5B4AAF.2040101@samsung.com> X-OriginalArrivalTime: 29 Aug 2011 10:12:20.0605 (UTC) FILETIME=[23742AD0:01CC6634] X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Lin Ming wrote: > On Mon, Aug 29, 2011 at 4:15 PM, Jaehoon Chung wrote: >> This patch is added the ioctl for tunable user request. > > Hi, > > What's the use case for this new ioctl? > In my case, this ioctl is used the background operation for eMMC. In eMMC's case, background operation(BKOPS) is supported. (but that is running with only card notifier, so i added new ioctl for user request) if we send the BKOPS request, card is notified to need the BKOPS. then running background operation. (Then user's responsibility is done) In future, i think that other block device should be used this ioctl. (if supported like BKOPS) Regard, Jaehoon Chung