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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 68A43C31E51 for ; Tue, 18 Jun 2019 06:52:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 45ED920665 for ; Tue, 18 Jun 2019 06:52:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728736AbfFRGwm (ORCPT ); Tue, 18 Jun 2019 02:52:42 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:18633 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728158AbfFRGwm (ORCPT ); Tue, 18 Jun 2019 02:52:42 -0400 Received: from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 43AAFAF366D1653AD995; Tue, 18 Jun 2019 14:52:38 +0800 (CST) Received: from [10.151.23.176] (10.151.23.176) by smtp.huawei.com (10.3.19.206) with Microsoft SMTP Server (TLS) id 14.3.439.0; Tue, 18 Jun 2019 14:52:28 +0800 Subject: Re: [RFC PATCH 0/8] staging: erofs: decompression inplace approach To: Greg Kroah-Hartman CC: , Miao Xie , , LKML , , Fang Wei , , References: <20190614181619.64905-1-gaoxiang25@huawei.com> <20190617203609.GA22034@kroah.com> <20190618054709.GA4271@kroah.com> <20190618064523.GA6015@kroah.com> From: Gao Xiang Message-ID: <2a6abbf9-20a9-c1dd-0091-d8e3009037eb@huawei.com> Date: Tue, 18 Jun 2019 14:52:21 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <20190618064523.GA6015@kroah.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.151.23.176] X-CFilter-Loop: Reflected Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On 2019/6/18 14:45, Greg Kroah-Hartman wrote: > On Tue, Jun 18, 2019 at 02:18:00PM +0800, Gao Xiang wrote: >> >> >> On 2019/6/18 13:47, Greg Kroah-Hartman wrote: >>> On Tue, Jun 18, 2019 at 09:47:08AM +0800, Gao Xiang wrote: >>>> >>>> >>>> On 2019/6/18 4:36, Greg Kroah-Hartman wrote: >>>>> On Sat, Jun 15, 2019 at 02:16:11AM +0800, Gao Xiang wrote: >>>>>> At last, this is RFC patch v1, which means it is not suitable for >>>>>> merging soon... I'm still working on it, testing its stability >>>>>> these days and hope these patches get merged for 5.3 LTS >>>>>> (if 5.3 is a LTS version). >>>>> >>>>> Why would 5.3 be a LTS kernel? >>>>> >>>>> curious as to how you came up with that :) >>>> >>>> My personal thought is about one LTS kernel one year... >>>> Usually 5 versions after the previous kernel...(4.4 -> 4.9 -> 4.14 -> 4.19), >>>> which is not suitable for all historical LTSs...just prepare for 5.3... >>> >>> I try to pick the "last" kernel that is released each year, which >>> sometimes is 5 kernels, sometimes 4, sometimes 6, depending on the >>> release cycle. >>> >>> So odds are it will be 5.4 for the next LTS kernel, but we will not know >>> more until it gets closer to release time. >> >> Thanks for kindly explanation :) >> >> Anyway, I will test these patches, land to our commerical products and try the best >> efforts on making it more stable for Linux upstream to merge. > > Sounds great. > > But why do you need to add compression to get this code out of staging? > Why not move it out now and then add compression and other new features > to it then? Move out of staging could be over several linux versions since I'd like to get majority fs people agreed to this. Decompression inplace is an important part of erofs to show its performance benefits over existed compress filesystems and I tend to merge it in advance. Thanks, Gao Xiang > > thanks, > > greg k-h >