From mboxrd@z Thu Jan 1 00:00:00 1970 From: Seungwon Jeon Subject: RE: "exclude asynchronous transfer" patch causes boot fail Date: Tue, 18 Jun 2013 21:33:45 +0900 Message-ID: <001701ce6c20$134cda00$39e68e00$%jun@samsung.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=Windows-1252 Content-Transfer-Encoding: 7bit Return-path: Received: from mailout3.samsung.com ([203.254.224.33]:43410 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932160Ab3FRMdr (ORCPT ); Tue, 18 Jun 2013 08:33:47 -0400 Received: from epcpsbgr1.samsung.com (u141.gpu120.samsung.co.kr [203.254.230.141]) by mailout3.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MOL00GWY9KAIED0@mailout3.samsung.com> for linux-mmc@vger.kernel.org; Tue, 18 Jun 2013 21:33:46 +0900 (KST) In-reply-to: Content-language: ko Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: 'Daniel Drake' , linux-mmc@vger.kernel.org On Saturday, June 15, 2013, Daniel Drake wrote: > On Mon, Jun 10, 2013 at 1:53 PM, Daniel Drake wrote: > > Testing the latest linus kernel on OLPC XO-4 (sdhci-pxav3), boot > > fails. Userspace does start, and I see that systemd is starting a few > > services (feels a bit slower than usual), then it hangs still while > > loading initial services - I don't even get to a shell prompt. > > > > git-bisect shows the following commit introduces the problem: > > > > commit 369d321ed1baa7748e770aaaae4d8effad699633 > > Author: Seungwon Jeon > > Date: Wed Dec 26 10:40:17 2012 +0900 > > > > mmc: queue: exclude asynchronous transfer for special request > > I realised that I wasn't testing linus master as I thought I was - I > was some way back in the history. > Updating to the latest makes the issue go away. I guess this was already fixed. Okay. For reference, there is no difference with between REQ_DISCARD and REG_FLUSH in mmc_blk_issue_rq()'s handling. Thanks, Seungwon Jeon > > Thanks > Daniel