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[198.145.29.99]) by mx.google.com with ESMTPS id o6si10808534pje.1.2019.06.24.02.35.12 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 24 Jun 2019 02:35:12 -0700 (PDT) Received-SPF: pass (google.com: domain of will@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=NZZkyhVj; spf=pass (google.com: domain of will@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=will@kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (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 BB8EA2089F; Mon, 24 Jun 2019 09:35:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561368912; bh=V+JNcIbt/6VMBYdQNX/9snknRFUTiqfcznYN8RZhvtU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NZZkyhVjPxs92xmMnw0gDIRG16eJWCsvHc7Hg5RDsDJmTCBhHEBTojZ9qQ98hKZWk 0+f3k5bX6F0Fkj813jbFbAW3IXULoD/yEAzXSX7dwjYgUVPKbDo/Z0piWvGWfN/gQt JgMhb1xlGDR29eCwqhAeDu4J6YRFoheN3QL2EW70= Date: Mon, 24 Jun 2019 10:35:07 +0100 From: Will Deacon To: Qian Cai Cc: Anshuman Khandual , Will Deacon , Catalin Marinas , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , linux-arm-kernel@lists.infradead.org Subject: Re: LTP hugemmap05 test case failure on arm64 with linux-next (next-20190613) Message-ID: <20190624093507.6m2quduiacuot3ne@willie-the-truck> References: <1560461641.5154.19.camel@lca.pw> <20190614102017.GC10659@fuggles.cambridge.arm.com> <1560514539.5154.20.camel@lca.pw> <054b6532-a867-ec7c-0a72-6a58d4b2723e@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170113 (1.7.2) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000131, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi Qian Cai, On Sun, Jun 16, 2019 at 09:41:09PM -0400, Qian Cai wrote: > > On Jun 16, 2019, at 9:32 PM, Anshuman Khandual wrote: > > On 06/14/2019 05:45 PM, Qian Cai wrote: > >> On Fri, 2019-06-14 at 11:20 +0100, Will Deacon wrote: > >>> On Thu, Jun 13, 2019 at 05:34:01PM -0400, Qian Cai wrote: > >>>> LTP hugemmap05 test case [1] could not exit itself properly and then degrade > >>>> the > >>>> system performance on arm64 with linux-next (next-20190613). The bisection > >>>> so > >>>> far indicates, > >>>> > >>>> BAD: 30bafbc357f1 Merge remote-tracking branch 'arm64/for-next/core' > >>>> GOOD: 0c3d124a3043 Merge remote-tracking branch 'arm64-fixes/for-next/fixes' > >>> > >>> Did you finish the bisection in the end? Also, what config are you using > >>> (you usually have something fairly esoteric ;)? > >> > >> No, it is still running. > >> > >> https://raw.githubusercontent.com/cailca/linux-mm/master/arm64.config > >> > > > > Were you able to bisect the problem till a particular commit ? > > Not yet, it turned out the test case needs to run a few times (usually > within 5) to reproduce, so the previous bisection was totally wrong where > it assume the bad commit will fail every time. Once reproduced, the test > case becomes unkillable stuck in the D state. > > I am still in the middle of running a new round of bisection. The current > progress is, > > 35c99ffa20ed GOOD (survived 20 times) > def0fdae813d BAD Just wondering if you got anywhere with this? We've failed to reproduce the problem locally. Will