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Tue, 21 Sep 2021 22:53:47 -0700 (PDT) Received: from [192.168.30.21] ([173.248.225.217]) by smtp.gmail.com with ESMTPSA id q1sm896036pjq.5.2021.09.21.22.53.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Sep 2021 22:53:46 -0700 (PDT) Subject: Re: [PATCH 1/1] mm/migrate: de-duplicate migrate_reason strings To: John Hubbard Cc: akpm@linux-foundation.org, almasrymina@google.com, dave.hansen@linux.intel.com, khandual@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, minchan@kernel.org, osalvador@suse.de, pasha.tatashin@soleen.com, weixugc@google.com, willy@infradead.org, yang.shi@linux.alibaba.com, ying.huang@intel.com, ziy@nvidia.com References: <20210922041755.141817-1-jhubbard@nvidia.com> <20210922041755.141817-2-jhubbard@nvidia.com> From: Weizhao Ouyang Message-ID: <90e7cefd-5ca0-f284-8c96-743e0f5ef8f4@gmail.com> Date: Wed, 22 Sep 2021 13:53:40 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <20210922041755.141817-2-jhubbard@nvidia.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=q1AvDwzu; spf=pass (imf07.hostedemail.com: domain of o451686892@gmail.com designates 209.85.215.170 as permitted sender) smtp.mailfrom=o451686892@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 36DAD10000A8 X-Stat-Signature: p1gyhptis9eihze4jbz6spqybdkyd6ur X-HE-Tag: 1632290028-795810 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 2021/9/22 12:17, John Hubbard wrote: > In order to remove the need to manually keep three different files in > synch, provide a common definition of the mapping between enum > migrate_reason, and the associated strings for each enum item. > > 1. Use the tracing system's mapping of enums to strings, by redefining > and reusing the MIGRATE_REASON and supporting macros, and using that to > populate the string array in mm/debug.c. > > 2. Move enum migrate_reason to migrate_mode.h. This is not strictly > necessary for this patch, but migrate mode and migrate reason go > together, so this will slightly clarify things. > > Cc: Weizhao Ouyang > Cc: "Huang, Ying" > Signed-off-by: John Hubbard > --- > include/linux/migrate.h | 19 +------------------ > include/linux/migrate_mode.h | 13 +++++++++++++ > mm/debug.c | 20 +++++++++++--------- > 3 files changed, 25 insertions(+), 27 deletions(-) LGTM. And, maybe rename the migrate_mode.h? Reviewed-by: Weizhao Ouyang Thanks, Weizhao