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[209.85.220.65]) by mx.google.com with SMTPS id d13sor20576787oih.174.2019.04.11.13.22.38 for (Google Transport Security); Thu, 11 Apr 2019 13:22:38 -0700 (PDT) Received-SPF: pass (google.com: domain of dan.j.williams@intel.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@intel-com.20150623.gappssmtp.com header.s=20150623 header.b="iGTfGVa/"; spf=pass (google.com: domain of dan.j.williams@intel.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=dan.j.williams@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=VUHJ1TIXCvXmT3GI7LoOGpDhaRQ0yHBgfaQJjVlgFKc=; b=iGTfGVa/iCd//+/eSY+LjGsgPNiemp5bROhTJmrOUgMix31u1QqcXJm02g8O3ewky5 5xOSUGSZuG7M8Mk2LRIdiMDT626+2x5Ox8D0hR47qJS7tmYPD7EDiZNaTtOiAr/PJ/HR hMelAIfQ+Oq5bJ6jPAUxMgAQTH5jWPLTz8OfZasIXrt00NGSzXLsx0btLTXI2nNseEch BwzDa/1l8V1QwoJp41DJjGjKyHE65c8Latqs3xSRKOleFMjZ7WmeQX4xHgi9mevHoYIn Cl4AkYFX4tH/1ymSRjI2Rll/LSr6TPW/Ze8wGPBTKdi1bQT5C4Cq3uw7JY6HgDJYZNeB S9Vw== X-Google-Smtp-Source: APXvYqynFTxt5ZPvH52KHUBPpBZSkhfJWm+GY05mVgf4q2YjMg354p7Od2ETL2NP+t5fKsv64DOpIAF10Bn1WEd8t/4= X-Received: by 2002:aca:f581:: with SMTP id t123mr8129669oih.0.1555014158568; Thu, 11 Apr 2019 13:22:38 -0700 (PDT) MIME-Version: 1.0 References: <20190215185151.GG7897@sirena.org.uk> <20190226155948.299aa894a5576e61dda3e5aa@linux-foundation.org> <20190228151438.fc44921e66f2f5d393c8d7b4@linux-foundation.org> <026b5082-32f2-e813-5396-e4a148c813ea@collabora.com> <20190301124100.62a02e2f622ff6b5f178a7c3@linux-foundation.org> <3fafb552-ae75-6f63-453c-0d0e57d818f3@collabora.com> <36faea07-139c-b97d-3585-f7d6d362abc3@collabora.com> <20190306140529.GG3549@rapoport-lnx> <21d138a5-13e4-9e83-d7fe-e0639a8d180a@collabora.com> In-Reply-To: From: Dan Williams Date: Thu, 11 Apr 2019 13:22:27 -0700 Message-ID: Subject: Re: next/master boot bisection: next-20190215 on beaglebone-black To: Guenter Roeck Cc: Kees Cook , kernelci@groups.io, Guillaume Tucker , Mike Rapoport , Andrew Morton , Michal Hocko , Mark Brown , Tomeu Vizoso , Matt Hart , Stephen Rothwell , Kevin Hilman , Enric Balletbo i Serra , Nicholas Piggin , Dominik Brodowski , Masahiro Yamada , Adrian Reber , Linux Kernel Mailing List , Johannes Weiner , Linux MM , Mathieu Desnoyers , Richard Guy Briggs , "Peter Zijlstra (Intel)" , info@kernelci.org Content-Type: text/plain; charset="UTF-8" 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 Thu, Apr 11, 2019 at 1:08 PM Guenter Roeck wrote: > > On Thu, Apr 11, 2019 at 10:35 AM Kees Cook wrote: > > > > On Thu, Apr 11, 2019 at 9:42 AM Guenter Roeck wrote: > > > > > > On Thu, Apr 11, 2019 at 9:19 AM Kees Cook wrote: > > > > > > > > On Thu, Mar 7, 2019 at 7:43 AM Dan Williams wrote: > > > > > I went ahead and acquired one of these boards to see if I can can > > > > > debug this locally. > > > > > > > > Hi! Any progress on this? Might it be possible to unblock this series > > > > for v5.2 by adding a temporary "not on ARM" flag? > > > > > > > > > > Can someone send me a pointer to the series in question ? I would like > > > to run it through my testbed. > > > > It's already in -mm and linux-next (",mm: shuffle initial free memory > > to improve memory-side-cache utilization") but it gets enabled with > > CONFIG_SHUFFLE_PAGE_ALLOCATOR=y (which was made the default briefly in > > -mm which triggered problems on ARM as was reverted). > > > > Boot tests report > > Qemu test results: > total: 345 pass: 345 fail: 0 > > This is on top of next-20190410 with CONFIG_SHUFFLE_PAGE_ALLOCATOR=y > and the known crashes fixed. In addition to CONFIG_SHUFFLE_PAGE_ALLOCATOR=y you also need the kernel command line option "page_alloc.shuffle=1" ...so I doubt you are running with shuffling enabled. Another way to double check is: cat /sys/module/page_alloc/parameters/shuffle