From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Wed, 21 Sep 2016 17:33:41 +0200 From: "gregkh@linuxfoundation.org" To: Alex Shi Message-ID: <20160921153341.GA25677@kroah.com> References: <57C78BE9.30009@linaro.org> <20160902191637.GC6323@sasha-lappy> <20160903000518.GN3950@sirena.org.uk> <1656524.OIRTMDr3jV@avalon> <57E22F8E.1040801@linaro.org> <20160921135601.zwsmvrrfbhlez24n@thunk.org> <57E2A5E3.4080407@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <57E2A5E3.4080407@linaro.org> Cc: "ltsi-dev@lists.linuxfoundation.org" , ksummit-discuss@lists.linuxfoundation.org Subject: Re: [Ksummit-discuss] [Stable kernel] feature backporting collaboration List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Wed, Sep 21, 2016 at 11:23:15PM +0800, Alex Shi wrote: > On 09/21/2016 09:56 PM, Theodore Ts'o wrote: > Yes, personally, I also keep using latest kernel on my laptop. But as to > a released product, could you let me know data center will ship to other > as product? My cloud provider keeps updating the kernel of my virtual machines to the latest upstream stable releases all the time. If yours doesn't, I suggest you get a better provider. > Or which enterprise distro kernel keep rebasing to upstream? Both SuSE and Oracle do this for their releases. > Most of product need team work, like mobile phone, include kernel, > libraries, user APP, the software number is tremendous. Why would updating a new kernel require userspace changes in these things? Kernels are always forward compatible, minus random driver bugs for crazy subsystems (drm does have some problems at times as people do point out.) > Thus base layer software update need long time testing for > compatibility and stability. Why isn't that happening constantly? Why wait a few years to do this for new versions? Why is the test frameworks that people have not always churning away at this type of thing to find our bugs as soon as possible? > Then rebasing to upstream is too luxury to them. Then they end up with a kernel, and a product, that is insecure and vulnerable when it ships. Not a good thing for something people trust personal data to... thanks, greg k-h