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[198.145.29.99]) by mx.google.com with ESMTPS id d14si160339pgn.390.2019.02.13.11.52.35 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 13 Feb 2019 11:52:35 -0800 (PST) Received-SPF: pass (google.com: domain of srs0=8kuc=qu=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) client-ip=198.145.29.99; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=wLQSK0O2; spf=pass (google.com: domain of srs0=8kuc=qu=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom="SRS0=8KUc=QU=linuxfoundation.org=gregkh@kernel.org" Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7A3E2222D0; Wed, 13 Feb 2019 19:52:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550087555; bh=QPejU1nGrklF7jDizGBjyiGrwlYJaw0zDwsmtyviJMw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=wLQSK0O2xlZnT8wJXZOUBFdQqO7UePZ5A18ViCuRUzPEfsk9BViBVbFcu7TJYzAIP OYdioetc94BDZEXy7TG3isjRJz5nwKtj/8lsH2cZM2T7fyS1p7CNQJGt2BSEumDLhs wMLq7YZsaokSPjRFfREA6ZMUROGf6jlyXAi2K4+0= Date: Wed, 13 Feb 2019 20:52:32 +0100 From: Greg KH To: Sasha Levin Cc: Amir Goldstein , Steve French , lsf-pc@lists.linux-foundation.org, linux-fsdevel , linux-mm , LKML , "Luis R. Rodriguez" Subject: Re: [LSF/MM TOPIC] FS, MM, and stable trees Message-ID: <20190213195232.GA10047@kroah.com> References: <20190212170012.GF69686@sasha-vm> <20190213073707.GA2875@kroah.com> <20190213091803.GA2308@kroah.com> <20190213192512.GH69686@sasha-vm> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190213192512.GH69686@sasha-vm> User-Agent: Mutt/1.11.3 (2019-02-01) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Feb 13, 2019 at 02:25:12PM -0500, Sasha Levin wrote: > On Wed, Feb 13, 2019 at 10:18:03AM +0100, Greg KH wrote: > > On Wed, Feb 13, 2019 at 11:01:25AM +0200, Amir Goldstein wrote: > > > Best effort testing in timely manner is good, but a good way to > > > improve confidence in stable kernel releases is a publicly > > > available list of tests that the release went through. > > > > We have that, you aren't noticing them... > > This is one of the biggest things I want to address: there is a > disconnect between the stable kernel testing story and the tests the fs/ > and mm/ folks expect to see here. > > On one had, the stable kernel folks see these kernels go through entire > suites of testing by multiple individuals and organizations, receiving > way more coverage than any of Linus's releases. > > On the other hand, things like LTP and selftests tend to barely scratch > the surface of our mm/ and fs/ code, and the maintainers of these > subsystems do not see LTP-like suites as something that adds significant > value and ignore them. Instead, they have a (convoluted) set of testing > they do with different tools and configurations that qualifies their > code as being "tested". > > So really, it sounds like a low hanging fruit: we don't really need to > write much more testing code code nor do we have to refactor existing > test suites. We just need to make sure the right tests are running on > stable kernels. I really want to clarify what each subsystem sees as > "sufficient" (and have that documented somewhere). kernel.ci and 0-day and Linaro are starting to add the fs and mm tests to their test suites to address these issues (I think 0-day already has many of them). So this is happening, but not quite obvious. I know I keep asking Linaro about this :( Anyway, just having a list of what tests each subsystem things is "good to run" would be great to have somewhere. Ideally in the kernel tree itself, as that's what kselftests are for :) thanks, greg k-h