Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752348AbdGDV42 (ORCPT ); Tue, 4 Jul 2017 17:56:28 -0400 Received: from mail-pg0-f52.google.com ([74.125.83.52]:34998 "EHLO mail-pg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752173AbdGDV41 (ORCPT ); Tue, 4 Jul 2017 17:56:27 -0400 Subject: Re: [GIT pull] irq updates for 4.13 To: Linus Torvalds Cc: Thomas Gleixner , Max Gurtovoy , Christoph Hellwig , LKML , Andrew Morton , Ingo Molnar , "H. Peter Anvin" References: <20a3d23f-2e56-e118-a355-e05dfcebe001@kernel.dk> From: Jens Axboe Message-ID: Date: Tue, 4 Jul 2017 15:56:24 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 946 Lines: 24 On 07/04/2017 12:34 PM, Linus Torvalds wrote: > On Tue, Jul 4, 2017 at 8:17 AM, Jens Axboe wrote: >> On 07/03/2017 06:00 PM, Linus Torvalds wrote: >>> >>> If they ever do come online, does that get fixed? I don't know. >>> Somebody should check. >> >> Yes, the blk-mq cpu hotplug code updates mappings when CPUs come and >> go, so that part is fine. That's exercised everytime the laptop is >> suspended and resumed. > > I don't think that's true any more. Commit fe631457ff3e changed it to > map the initial CPU's sequentially whether they are online or not. > Only after you run out of hardware queues will we start playing games. > > That's what worries me about the conflict - the two changes did very > different things to the same code. I'd really like somebody to take a > look at my resolution, and just in general how those two different > changes work together. OK, I'll take a look at it tomorrow. -- Jens Axboe