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[209.85.128.172]) by smtp.gmail.com with ESMTPSA id u18-20020a05620a121200b0069fc13ce1e2sm3969661qkj.19.2022.05.02.02.10.37 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 May 2022 02:10:37 -0700 (PDT) Received: by mail-yw1-f172.google.com with SMTP id 00721157ae682-2ef5380669cso141027807b3.9 for ; Mon, 02 May 2022 02:10:37 -0700 (PDT) X-Received: by 2002:a81:547:0:b0:2f8:6e8:19d7 with SMTP id 68-20020a810547000000b002f806e819d7mr10394893ywf.383.1651482637269; Mon, 02 May 2022 02:10:37 -0700 (PDT) MIME-Version: 1.0 References: <20220428172040.GA3623323@roeck-us.net> <20220429130146.kxhxmi5jquzw56wy@revolver> <20220429161813.oe55p4akkinjcarq@revolver> In-Reply-To: <20220429161813.oe55p4akkinjcarq@revolver> From: Geert Uytterhoeven Date: Mon, 2 May 2022 11:10:25 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] mapletree-vs-khugepaged To: Liam Howlett Cc: Heiko Carstens , Guenter Roeck , Andrew Morton , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset="UTF-8" Authentication-Results: imf12.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf12.hostedemail.com: domain of geert.uytterhoeven@gmail.com designates 209.85.222.180 as permitted sender) smtp.mailfrom=geert.uytterhoeven@gmail.com X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 14B8A40066 X-Rspam-User: X-Stat-Signature: hn9ipbegb484xpnr85uzkjxwi1pbrosa X-HE-Tag: 1651482624-697708 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: Hi Liam, On Sat, Apr 30, 2022 at 1:58 AM Liam Howlett wrote: > * Heiko Carstens [220429 09:19]: > > On Fri, Apr 29, 2022 at 01:01:53PM +0000, Liam Howlett wrote: > > > * Heiko Carstens [220429 08:10]: > > > > On Thu, Apr 28, 2022 at 10:20:40AM -0700, Guenter Roeck wrote: > > > > > On Wed, Apr 27, 2022 at 03:10:45PM -0700, Andrew Morton wrote: > > > > > > Fix mapletree for patch series "Make khugepaged collapse readonly FS THP > > > > > > more consistent", v3. > > > > > > > > > > > > Cc: Liam R. Howlett > > > > > > Signed-off-by: Andrew Morton > > > > > > > > > > This patch causes all my sparc64 boot tests to fail. Bisect and crash logs > > > > > attached. > > > > > > > > > > Guenter > > ... > > > > > > > > FWIW, same on s390 - linux-next is completely broken. Note: I didn't > > > > bisect, but given that the call trace, and even the failing address > > > > match, I'm quite confident it is the same reason. > > > > > > This is worth a lot to me. Thanks for the report and the testing. > > > > Not sure if it is of any relevance, and you are probably aware if it > > anyway, but both sparc64 and s390 are big endian; and there was no > > report from little endian architectures yet. > > I was aware they are big endian, but thanks - the more info the better. > sparc64 is technically bi-endian but I think everyone runs it in big Sparc64 is big-endian. It has support for accessing little endian data in memory, but that's merely an optimization. > endian mode? Is alpha the same? There was a report of alpha having Alpha is little-endian. > issues too. m68k is also big endian - but also nommu, so that makes > testing difficult. M68k exists with and without MMU. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds