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Mon, 20 May 2024 09:47:40 +0800 Subject: Re: [PATCH -rc7] mm/huge_memory: mark huge_zero_page reserved To: kernel test robot CC: , , , , , , , References: <202405171417.1bb0856a-lkp@intel.com> From: Miaohe Lin Message-ID: <1872dc30-01ff-008c-aedb-9a83c57a6bc7@huawei.com> Date: Mon, 20 May 2024 09:47:39 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <202405171417.1bb0856a-lkp@intel.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.173.135.154] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To canpemm500002.china.huawei.com (7.192.104.244) X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 32E2F140008 X-Rspam-User: X-Stat-Signature: u8ouycbj1ix5xofqqdhjc1jjfodu8wc7 X-HE-Tag: 1716169664-92142 X-HE-Meta: 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 cgtjoqWz Nps70cUi5IPt1AzeZc/Y2jXxOXyv/+6WJwoHr7da+F1CgdQotpEyTpTSBSBBIVqpzvPggVGbdlPXLE9uInHQbKEuHGwfZhG7Cl5jOOTVTjXa2KZVzoKTMzBvbOEHRq36bgPQuYnlACODynH6HMkttCXqZ5mz2K95CslyYgCRzlBop1Fh1DgUMFf/mC8NsHg4QFimc2AnCH1+BgVqM8Yy9UmcQClERUHbFucm9C8TOqSgh3R8blPMFdY2623bgIKFZoSGT0L0l+o1vbWjNUbEWj6f07P+HR/75i4n54OpE4v8afsID+bONBNpxW2U6o7+whST45EJQRuwG2TeRYAcKgxcv9Or2tHIOrg1kOhySw9sYkFt55Q15evruMg== 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: List-Subscribe: List-Unsubscribe: On 2024/5/17 15:03, kernel test robot wrote: > > > Hello, > > kernel test robot noticed "kernel_BUG_at_include/linux/page-flags.h" on: > > commit: 8e6ff9c4aad2c677c53f70d9e193c35cbbafcb88 ("[PATCH -rc7] mm/huge_memory: mark huge_zero_page reserved") > url: https://github.com/intel-lab-lkp/linux/commits/Miaohe-Lin/mm-huge_memory-mark-huge_zero_page-reserved/20240511-115840 > base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git cf87f46fd34d6c19283d9625a7822f20d90b64a4 > patch link: https://lore.kernel.org/all/20240511035435.1477004-1-linmiaohe@huawei.com/ > patch subject: [PATCH -rc7] mm/huge_memory: mark huge_zero_page reserved > > in testcase: trinity > version: trinity-i386-abe9de86-1_20230429 > with following parameters: > > runtime: 300s > group: group-03 > nr_groups: 5 > > > > compiler: gcc-13 > test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G > > (please refer to attached dmesg/kmsg for entire log/backtrace) > > > +------------------------------------------+------------+------------+ > | | cf87f46fd3 | 8e6ff9c4aa | > +------------------------------------------+------------+------------+ > | kernel_BUG_at_include/linux/page-flags.h | 0 | 11 | > | invalid_opcode:#[##] | 0 | 11 | > | RIP:get_huge_zero_page | 0 | 11 | > | Kernel_panic-not_syncing:Fatal_exception | 0 | 11 | > +------------------------------------------+------------+------------+ > Thanks for your report. > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-lkp/202405171417.1bb0856a-lkp@intel.com > > > [ 272.633454][ T3838] ------------[ cut here ]------------ > [ 272.634362][ T3838] kernel BUG at include/linux/page-flags.h:540! > [ 272.635422][ T3838] invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI > [ 272.636518][ T3838] CPU: 0 PID: 3838 Comm: trinity-c2 Not tainted 6.9.0-rc7-00184-g8e6ff9c4aad2 #1 > [ 272.638008][ T3838] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 > [ 272.639707][ T3838] RIP: 0010:get_huge_zero_page (include/linux/page-flags.h:540 (discriminator 1) mm/huge_memory.c:211 (discriminator 1)) I think the root cause is that PG_reserved is inhibited on compound pages. So my original version of patch breaks the assumption. But since PG_reserved is to be removed, I have dropped this patch. Thanks. .