linux-kernel - Re: 5.10 LTS Kernel: 2 or 6 years?

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Message-ID: <YDDcHpmAWmzQcStD@kroah.com>
Date:   Sat, 20 Feb 2021 10:53:34 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Hanjun Guo <guohanjun@...wei.com>
Cc:     Scott Branden <scott.branden@...adcom.com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        PEIXIN HOU <PEIXIN.HOU@...wei.com>,
        Yanjin <yanjin.yan@...wei.com>,
        "Zhangdianfang (Dianfang, OS Lab)" <zhangdianfang@...wei.com>,
        Zhaohongjiang <zhaohongjiang@...wei.com>,
        Huxinwei <huxinwei@...wei.com>,
        Wei Yongjun <weiyongjun1@...wei.com>
Subject: Re: 5.10 LTS Kernel: 2 or 6 years?

On Sat, Feb 20, 2021 at 03:02:54PM +0800, Hanjun Guo wrote:
> On 2021/2/19 17:08, Greg Kroah-Hartman wrote:
> > On Fri, Feb 19, 2021 at 04:54:24PM +0800, Hanjun Guo wrote:
> > > Hi Greg,
> > > 
> > > On 2021/1/26 15:29, Greg Kroah-Hartman wrote:
> > > [...]
> > > > 
> > > > I want to see companies _using_ the kernel, and most importantly,
> > > > _updating_ their devices with it, to know if it is worth to keep around
> > > > for longer than 2 years.  I also, hopefully, want to see how those
> > > > companies will help me out in the testing and maintenance of that kernel
> > > > version in order to make supporting it for 6 years actually possible.
> > > > 
> > > > So, are you planning on using 5.10?  Will you will be willing to help
> > > > out in testing the -rc releases I make to let me know if there are any
> > > > problems, and to help in pointing out and backporting any specific
> > > > patches that your platforms need for that kernel release?
> > > 
> > > We(Huawei) are willing to commit resources to help out in testing the
> > > stable -rc releases, and to help to backport patches for stable kernels.
> > 
> > Wonderful!
> > 
> > > 5.10 stable kernel will be used for openEuler [1] kernel and also inside
> > > Huawei. From customer's feedback, it's very important to see the stable
> > > kernel we used to be maintained for 6 years in the community, and we
> > > will use 5.10 kernel for at least 6 years, so we are willing to help
> > > you and help ourselves :)
> > > 
> > > In specific, we will start from the testing work, using HULK robot
> > > (reports lots of bugs to mainline kernel) testing framework to test
> > > compile, reboot, functional testing, and will extend to basic
> > > performance regression testing in the future.
> > 
> > Great!  Do you all need an email notification when the -rc releases come
> > out for the stable trees, or can you trigger off of the -rc stable git
> > tree?  Different CI systems work in different ways :)
> 
> We can trigger the test when you updated the -rc stable git tree,
> by monitoring new commits for the stable branches. So if you push
> all the commits at once for -rc stable branches, then our CI system
> can work well.

I do push to the -rc branches, but those branches are rebased, and I do
"intermediate" pushes as well.  Meaning I push to have CI systems run on
the existing patch queue at times that are not only the "main" -rc
release periods.

Watch the branches for a few weeks to get an idea of how they work if
you are curious.

> > And if you can reply to the -rc release emails with a "Tested-by:" tag,
> > I will be glad to add that to the release commit when that happens to
> > show that you all have tested the release.
> 
> Thanks, will reply "Tested-by:" with -rc releases. We are working on
> setting up the test farm and will report the test results in a week.

Great, thanks!

greg k-h