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[66.187.233.206]) by smtp.gmail.com with ESMTPSA id t67sm224679qkf.34.2019.06.12.11.35.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 12 Jun 2019 11:35:58 -0700 (PDT) Message-ID: <1560364557.5154.2.camel@lca.pw> Subject: Re: [PATCH -next] arm64/mm: fix a bogus GFP flag in pgd_alloc() From: Qian Cai To: Mike Rapoport Cc: Mark Rutland , Will Deacon , Andrew Morton , catalin.marinas@arm.com, Linux Kernel Mailing List , mhocko@kernel.org, linux-mm@kvack.org, vdavydov.dev@gmail.com, hannes@cmpxchg.org, cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org Date: Wed, 12 Jun 2019 14:35:57 -0400 In-Reply-To: <20190612065728.GB4761@rapoport-lnx> References: <1559656836-24940-1-git-send-email-cai@lca.pw> <20190604142338.GC24467@lakrids.cambridge.arm.com> <20190610114326.GF15979@fuggles.cambridge.arm.com> <1560187575.6132.70.camel@lca.pw> <20190611100348.GB26409@lakrids.cambridge.arm.com> <20190611124118.GA4761@rapoport-lnx> <3F6E1B9F-3789-4648-B95C-C4243B57DA02@lca.pw> <20190612065728.GB4761@rapoport-lnx> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.22.6 (3.22.6-10.el7) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2019-06-12 at 09:57 +0300, Mike Rapoport wrote: > Hi, > > On Tue, Jun 11, 2019 at 08:46:45AM -0400, Qian Cai wrote: > > > > > On Jun 11, 2019, at 8:41 AM, Mike Rapoport wrote: > > > > > > Sorry for the delay, I'm mostly offline these days. > > > > > > I wanted to understand first what is the reason for the failure. I've > > > tried > > > to reproduce it with qemu, but I failed to find a bootable configuration > > > that will have PGD_SIZE != PAGE_SIZE :( > > > > > > Qian Cai, can you share what is your environment and the kernel config? > > > > https://raw.githubusercontent.com/cailca/linux-mm/master/arm64.config > > > > # lscpu > > Architecture:        aarch64 > > Byte Order:          Little Endian > > CPU(s):              256 > > On-line CPU(s) list: 0-255 > > Thread(s) per core:  4 > > Core(s) per socket:  32 > > Socket(s):           2 > > NUMA node(s):        2 > > Vendor ID:           Cavium > > Model:               1 > > Model name:          ThunderX2 99xx > > Stepping:            0x1 > > BogoMIPS:            400.00 > > L1d cache:           32K > > L1i cache:           32K > > L2 cache:            256K > > L3 cache:            32768K > > NUMA node0 CPU(s):   0-127 > > NUMA node1 CPU(s):   128-255 > > Flags:               fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics > > cpuid asimdrdm > > > > # dmidecode > > Handle 0x0001, DMI type 1, 27 bytes > > System Information > >         Manufacturer: HPE > >         Product Name: Apollo 70              > >         Version: X1 > >         Wake-up Type: Power Switch > >         Family: CN99XX > > > > Can you please also send the entire log when the failure happens? https://cailca.github.io/files/dmesg.txt > Another question, is the problem exist with PGD_SIZE == PAGE_SIZE? No.