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[198.145.29.99]) by mx.google.com with ESMTPS id z12si109076pgv.1.2019.02.13.11.25.14 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 13 Feb 2019 11:25:14 -0800 (PST) Received-SPF: pass (google.com: domain of sashal@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=N7fF38VA; spf=pass (google.com: domain of sashal@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=sashal@kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from localhost (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (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 C36A0218D3; Wed, 13 Feb 2019 19:25:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550085914; bh=wp88X0n7T+oW/4jJeVP1LwxYcQsnaad4aiDkPEIVESg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=N7fF38VAjYGoMh9ztuD8OYJI6pSNlaXDcvqGOtmZqcF3KmSGICCypWjmmZdbbJ6ds XMdtNXg2N7BuRK1HanA9BA+TyPVn5PJG619hBDoDDL6Bs+qhygWzSM2qwbIONM4LiD Q2CYn/XxDXun2Fv3qnsJm1ly4G+iCSh1eZzGhw5Q= Date: Wed, 13 Feb 2019 14:25:12 -0500 From: Sasha Levin To: Greg KH 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: <20190213192512.GH69686@sasha-vm> References: <20190212170012.GF69686@sasha-vm> <20190213073707.GA2875@kroah.com> <20190213091803.GA2308@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20190213091803.GA2308@kroah.com> User-Agent: Mutt/1.10.1 (2018-07-13) 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 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). -- Thanks, Sasha