From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3E88C433E1 for ; Mon, 27 Jul 2020 16:35:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9C088208E4 for ; Mon, 27 Jul 2020 16:35:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732363AbgG0QfS (ORCPT ); Mon, 27 Jul 2020 12:35:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58136 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729315AbgG0QfR (ORCPT ); Mon, 27 Jul 2020 12:35:17 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B8FBEC061794; Mon, 27 Jul 2020 09:35:17 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: krisman) with ESMTPSA id 77A29261235 From: Gabriel Krisman Bertazi To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Mike Snitzer , Sasha Levin Subject: Re: [PATCH 5.7 024/179] dm mpath: pass IO start time to path selector Organization: Collabora References: <20200727134932.659499757@linuxfoundation.org> <20200727134933.846667790@linuxfoundation.org> Date: Mon, 27 Jul 2020 12:35:13 -0400 In-Reply-To: <20200727134933.846667790@linuxfoundation.org> (Greg Kroah-Hartman's message of "Mon, 27 Jul 2020 16:03:19 +0200") Message-ID: <87sgdcuda6.fsf@collabora.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Greg Kroah-Hartman writes: > From: Gabriel Krisman Bertazi > > [ Upstream commit 087615bf3acdafd0ba7c7c9ed5286e7b7c80fe1b ] > > The HST path selector needs this information to perform path > prediction. For request-based mpath, struct request's io_start_time_ns > is used, while for bio-based, use the start_time stored in dm_io. Hi Greg, This patch is not -stable material. It is only needed for a new feature merged in 5.8. Thanks, -- Gabriel Krisman Bertazi