Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751636AbaG1TFR (ORCPT ); Mon, 28 Jul 2014 15:05:17 -0400 Received: from mail-la0-f42.google.com ([209.85.215.42]:54561 "EHLO mail-la0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750929AbaG1TFO (ORCPT ); Mon, 28 Jul 2014 15:05:14 -0400 MIME-Version: 1.0 In-Reply-To: <20140728185538.GB17609@kroah.com> References: <1406572110-26823-1-git-send-email-mcgrof@do-not-panic.com> <1406572110-26823-3-git-send-email-mcgrof@do-not-panic.com> <20140728185538.GB17609@kroah.com> From: "Luis R. Rodriguez" Date: Mon, 28 Jul 2014 12:04:50 -0700 X-Google-Sender-Auth: sh-noq88sKu_Z0vxWE-rPORABGo Message-ID: Subject: Re: [PATCH v2 2/4] driver core: enable drivers to use deferred probe from init To: Greg KH , Santosh Rastapur , Hariprasad S Cc: Takashi Iwai , "linux-kernel@vger.kernel.org" , Tetsuo Handa , Joseph Salisbury , Kay Sievers , One Thousand Gnomes , Tim Gardner , Pierre Fersing , Andrew Morton , Oleg Nesterov , Benjamin Poirier , Nagalakshmi Nandigama , Praveen Krishnamoorthy , Sreekanth Reddy , Abhijit Mahajan , MPT-FusionLinux.pdl@avagotech.com, Linux SCSI List , "netdev@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 28, 2014 at 11:55 AM, Greg KH wrote: > So, what drivers are having problems in their init sequence, and why > aren't they using async firmware loading? Fixing drivers is one thing, fixing drivers *now* because *now* drivers are failing due to a regression is another thing and that's what we have now so lets just be clear on that. The 30 second rule is a major driver requirement change and it should not be taken slightly, all of a sudden this is a new requirement but you won't know that unless you're reading these threads or hit an issue. That's an issue in itself. The cxgb4: driver is an example where although I did propose patches to use asynch firmware loading the entire registration of the netdevice would need to be changed as well in order to get this right. In short we have to scramble now to first identify drivers that have long init sequences and then fix. There's an assumption that we can easily fix drivers, this can take time. This series, although does take advantage of a kernel interface for other uses, lets us identify these drivers on the kernel ring buffer, so we can go and address fixing them with time. Luis -- 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/