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b=aJcweLKm9pp8NQp9VuqHN9g8KhPIAgSKYkkfrCK91Dse76Jy5LNRsMJfgggHjy0WJ n+GgtNlQX1XEejWmDfSv4eh5QAFpi4qDOdZgkNn01QVPdoFDAc1K9wx5kBji1fRo1d zDe10WErzLLJjshSAEyqrIcJVt57pk7/pHxMJk0JnJ+69U44Uw7Q1oSM6fPCb/dlUo /Og7UF/JioKTYZ3ynhkxgylF0e631eLBsIeWimgQytJWU5CGOEcvuCLC2Mt1ETLSoF kN9hZihzKQlvGBFKRqJiSs6zCWZPbBx8I2mTPKzPr5PhV3hrIqOQUci0OCL3YBhHrd qV0POmeC7KNxA== From: SeongJae Park To: Gutierrez Asier Cc: SeongJae Park , artem.kuzin@huawei.com, stepanov.anatoly@huawei.com, wangkefeng.wang@huawei.com, yanquanmin1@huawei.com, zuoze1@huawei.com, damon@lists.linux.dev, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v2 2/4] mm/damon: Support for synchrounous huge pages collapse Date: Wed, 11 Mar 2026 07:17:53 -0700 Message-ID: <20260311141753.96543-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <0c3068da-4dcb-4bc7-a762-2f529cb5abc2@huawei-partners.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: B70784000B X-Stat-Signature: io7faqnmm3mea5sdiigzkgj6wz17stax X-Rspam-User: X-HE-Tag: 1773238683-415981 X-HE-Meta: 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 5X16oaRD A8Vui4ThhrZrURtwdCv8XUMOYh7G2RPY92aWW8ty37ILvUU36cTW8JnIM1yPp/CkaXo6BzqZD0rgaQlBbqy47n1e9RMLxOUyN6TFYbj6xjGAezanrAfIReJ61lgdQpmkAL2Rp4bOBieR3G3tLj5h0c9hrKAifHWMp3j00SwZMHzTEpn3zHdE3lmy7NklvegldHGnyyUgDTMLuqaz+DmOPqsBrhlh2JMTgA2fDgsnOmh7Xnxf/ah8Ocxtz2EbdanF5tD2TP0yF6uBcFu94Ns0ifaeKqJZbcnIESHQaWVo1oRDc3X5ui4GvKlpnHQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 11 Mar 2026 16:11:12 +0300 Gutierrez Asier wrote: > > > On 3/11/2026 4:02 AM, SeongJae Park wrote: > > On Tue, 10 Mar 2026 16:24:18 +0000 wrote: > > > >> From: Asier Gutierrez > > > > Please add more descriptions of the change, including the motivation. > > > > I assume the motivation is similar to MADV_COLLAPSE that aims to make > > synchronous and therefore faster huge page collapsing impacts copared to > > MADV_HUGEPAGE? It would be nice to make it clear here. Also, if my assumption > > is not wrong, adding a test results showing the benefit of DAMOS_COLLAPSE over > > DAMOS_HUGEPAGE here would be nice. > > You are right. I will make it more clear in the cover letter for the next > version. Sounds good. But please add a brief commit message in addition to the subject here, too. Some people complains blank commit message looks odd. Thanks, SJ [...]