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Mon, 11 May 2026 15:19:29 +0000 (UTC) X-FDA: 84755498058.05.F4B0F80 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf24.hostedemail.com (Postfix) with ESMTP id 139AD18000E for ; Mon, 11 May 2026 15:19:27 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b="RhNOpg/u"; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf24.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1778512768; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=DjbN/z5yBeTZXQK+wjUkrgjtk6tj+9KLkVYcPDjZzQA=; b=JavRfM6ucIJiq5FVw4NTwMXCPdwHTxJdC4OUa8rMhANsb4jfnFkRtm/0OvCJetVB3tV7ZX cq3Fv8/Gi4V0J3U66hzc/Bcf4DDd5sqOofS0+6EvhSkHXFzIQEKnoymuR/YELAxKiL1bo9 LL5WroDIs7vMcIzqPHgWnbSt79IahuQ= ARC-Seal: i=1; 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b=RhNOpg/uboJo8mSSDhE30GhoMUuRfEzOHJED85FblRCqbqREpxN+BVu5OEn/lRohF ydvcORhId7WwWS3mbfayalOvKwMJodNo8NmKuh2rSmb7a5LWzdDDbSLbCJ4RkAb9fz /76TdIkuujQo3T7nVFOW+wA/pcuuSkvlAPzZ8dyOd6MZSXM7txWlFzRcV1zOSZjh+I OUA0fjm++4aTzvtk5J7Ubx2MB73awPpHTyduFWQfHldrkYbdEOt/Uahtyy+Y2B1VEO tmsliiASI6OJiYPwU1JKURhYN5sE1x41Xa3VIcKqqc63yRbRyMHNSgu3Otxpt6uvJF txby6BBijCyUg== Message-ID: <088ded16-09ca-4c40-ab23-62108c342588@kernel.org> Date: Mon, 11 May 2026 17:19:18 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/7] Accelerate page migration with batch copying and hardware offload To: "Huang, Ying" , Shivank Garg Cc: akpm@linux-foundation.org, kinseyho@google.com, weixugc@google.com, ljs@kernel.org, Liam.Howlett@oracle.com, vbabka@kernel.org, willy@infradead.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, ziy@nvidia.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, gourry@gourry.net, apopple@nvidia.com, dave@stgolabs.net, Jonathan.Cameron@huawei.com, rkodsara@amd.com, vkoul@kernel.org, bharata@amd.com, sj@kernel.org, rientjes@google.com, xuezhengchu@huawei.com, yiannis@zptcorp.com, dave.hansen@intel.com, hannes@cmpxchg.org, jhubbard@nvidia.com, peterx@redhat.com, riel@surriel.com, shakeel.butt@linux.dev, stalexan@redhat.com, tj@kernel.org, nifan.cxl@gmail.com, jic23@kernel.org, aneesh.kumar@kernel.org, nathan.lynch@amd.com, Frank.li@nxp.com, djbw@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20260428155043.39251-2-shivankg@amd.com> <87a4ub35ja.fsf@DESKTOP-5N7EMDA> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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Should the batch path run without a registered migrator? Patches 1-4 >> are self-contained and use folios_mc_copy() (CPU). I have several >> options like making batch path always-on for eligible folios, or >> giving admin an option to flip the static branch, or keep the gate. >> I'm leaning toward always-on. >> >> 2. Carrying already_copied via folio->migrate_info vs changing the >> migrate_folio() callback signature (Huang, Ying). I went with the >> field for now to avoid touching every fs callback before the design >> settles. Happy to revisit. > > Personally, I still prefer to change migrate_folio() callbacks for > better readability. Can that be added as a cleanup on top? -- Cheers, David