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X-IronPort-AV: E=McAfee;i="6600,9927,10858"; a="415342318" X-IronPort-AV: E=Sophos;i="6.03,212,1694761200"; d="scan'208";a="415342318" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Oct 2023 01:19:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10858"; a="703220588" X-IronPort-AV: E=Sophos;i="6.03,212,1694761200"; d="scan'208";a="703220588" Received: from yhuang6-desk2.sh.intel.com (HELO yhuang6-desk2.ccr.corp.intel.com) ([10.238.208.55]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Oct 2023 01:19:41 -0700 From: "Huang, Ying" To: Kefeng Wang Cc: Andrew Morton , , , , , Zi Yan Subject: Re: [PATCH -next 1/7] mm_types: add _last_cpupid into folio References: <20231010064544.4162286-1-wangkefeng.wang@huawei.com> <20231010064544.4162286-2-wangkefeng.wang@huawei.com> Date: Tue, 10 Oct 2023 16:17:14 +0800 In-Reply-To: <20231010064544.4162286-2-wangkefeng.wang@huawei.com> (Kefeng Wang's message of "Tue, 10 Oct 2023 14:45:38 +0800") Message-ID: <87il7ehoxh.fsf@yhuang6-desk2.ccr.corp.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=ascii X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 51030180008 X-Stat-Signature: se76d41exedp8dsaup54u6cz4pqjj659 X-HE-Tag: 1696925985-597075 X-HE-Meta: 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 aA3xSuWd vHlIgYsTChwvxH2EBs5gkF7m9QPDuigJVis0vNIE6PyTpYOGDQwO31REJV7PWF/s/tH7EDdXKf/WKFFr0wjuCnqC7hUL6biNsXTXULItO3dY7ecSlkZ0ejX6J9fYrr82DGx4YhAbsmSA4DGaSwiGitw19/x14g13BRiRFHSxZAhdcAb0yAyWVCFuGO+MLAdVXMy1ksAW8Qg4WdlGyeD+RXJHpMQ== 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: Kefeng Wang writes: > At present, only arc/sparc/m68k define WANT_PAGE_VIRTUAL, both of > them don't support numa balancing, and the page struct is aligned > to _struct_page_alignment, it is safe to move _last_cpupid before > 'virtual' in page, meanwhile, add it into folio, which make us to > use folio->_last_cpupid directly. Add BUILD_BUG_ON() to check this automatically? -- Best Regards, Huang, Ying