From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qt1-f174.google.com (mail-qt1-f174.google.com [209.85.160.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B5436269CF1 for ; Thu, 6 Mar 2025 18:19:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741285188; cv=none; b=ou5LlU+wrDN1jLqbzNIE6vwo4rbbCmUudSAc5Q8IHc9z/na55aFwjti9/0r1YZsdpp/olg3LUCQxbVNQvAJu3dxV1lojejHChGO0l6IpYRcvqVRF7GPZEeBNKqJTD9j87a2/kSttRdbqoSpUgCQUcqQmtrmH6juS6oq0ZA4+LPU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741285188; c=relaxed/simple; bh=TqiZKDYRbvqiA+onzWKWde9aH/FtaKLM3ZFPhd2Xe3M=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=LI+lamnMIhjzQDMPURzBv6MZ1ruLvweDwFI3fHaJ8mzJ2NZ3FVSjKmw92+seD4jL6QKptBMHmcv5B3QLv43MXAlWGy3ogAH5lSTalRX+hYQJTlV8fsFK93xyIlPdGIon09KljD7BcfgfCbHevDbF7gMldXUfsxSOi8Jdi7QoK1U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=gourry.net; spf=pass smtp.mailfrom=gourry.net; dkim=pass (2048-bit key) header.d=gourry.net header.i=@gourry.net header.b=KUyRHqeC; arc=none smtp.client-ip=209.85.160.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=gourry.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gourry.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gourry.net header.i=@gourry.net header.b="KUyRHqeC" Received: by mail-qt1-f174.google.com with SMTP id d75a77b69052e-474f15a2087so4423691cf.1 for ; Thu, 06 Mar 2025 10:19:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gourry.net; s=google; t=1741285185; x=1741889985; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=tcWUU1E6OiQ5QkC/8p7XoPGRHT862BXEOfHZQ44uF5Q=; b=KUyRHqeC5JaRGd1hQFjScxhlQnsZFtaFCPRUnv7cwHP0XiZb3Y8sbyuieVbUKI4i0D XTSovfMBDE5Pjt66dyxwNl3iatlF27QuPMG7EVDqN3Q9qvmdWHaQYdgJgiDqIbzvBoxx Z8tYGuZI1F155rpM908pByOUb2Wn+pc9Ahum5wCUOwBVnRQnPpeD+frZbJMMXCkLOu9W clzpGI/5PAdsgm+24kdVW7G+iAhc6Bx8vU+Id2z92vw0EsZpIJnFcNHwlwqE3dv284br 5f7GcGvJ8SNdn1jKPic22a7Y2QkMRfpeAKerpA6MMlA0Qes3fTWRwDrcPRrbeJMDBc8p cfgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741285185; x=1741889985; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=tcWUU1E6OiQ5QkC/8p7XoPGRHT862BXEOfHZQ44uF5Q=; b=E5dztinhW5WxDDQGhJTQsNTQf5uFIG984PB6ZwuYT8mxM097yJuFvhKpsP1LNG7hm9 S85pDrGwEVlwbMDUdrWwGQbm2rLFwcQQVTUlo8cr1DSgjwSa0N7orfDFwFTwGgkplg6C 0OukehRl/vbU8SL6EAy0Kts+CZOxrfUgmV84abe3KIgnRFa483oVOQkYJS5f2t+bLwvl GmKGMLKDvdmMw1g09i8JMaoFaTsfdGILPNjOtpNywbSpyMF1THJEMa2aKaTrDkjQBXBy 3sAnqSHes11h7hKT6n9XqdLf67H6ai18qC+yUrebQKIWNRoGIQ+p6jWZj2Jl3iyM6be3 lkhA== X-Forwarded-Encrypted: i=1; AJvYcCVeLwivvqCbT49N11DLQlC7OkRT75nWxUItvppZROSuHG/uzeOUHGfpDaxO/SNAiWNZHOQuDzxGOSEkC28=@vger.kernel.org X-Gm-Message-State: AOJu0YzIVONXFRcJHeP25NVWfPGq9erErcLp2v0vQ0ygblk0YOfX8W8d dt2Q7TSBzP5vuX17d6ppgl6n0Zh+GSWK2QjMRrqLIZUtcTQqwN1/kS+ojq/sefQ= X-Gm-Gg: ASbGncu42fjjr8ChhmkkwSzoSZyeiC1LlWT6Rxobuvi5T4ljiG8nCeipWCNGGBoo/tI 366mhCOpdzhF/4DkCJjJ3CPz7uH/edbJu+Tc5EKqw32B8ZkWg3Z/JXLTX4u2rsvUgMiHcdkOVtJ rD42NBOgkXD7MXAGB36amoReSOH4NVM9pc0w5Hb3sS88bB7u2Q8ibIxGegweGOZkZQbOccYZgDL ZXtfOL3PYZzoVeSf7+686xpQ4YLbmCdEMPBQbHR1G2Hre5OvOqLuouLBlzRZ29X0htTXr1B8XX1 DIFF/CBX3xTccfTJ0K632irgJ5H84WhGkcWjYRb7DBnKRiYvOrbnAZZmq7xshg+mKZHzjU6TLIV tL6aveWYgBNFD1uZo52jXTy3vEec= X-Google-Smtp-Source: AGHT+IF1Oy+4QhvAWwHeDn3R0uQ5Isy1d2l2u08+njtWzaQFhNdJOyfxxqQyz/PR71XHxSfgw3/fYg== X-Received: by 2002:ac8:5d54:0:b0:474:dc44:28c4 with SMTP id d75a77b69052e-4761194f13emr906341cf.38.1741285185382; Thu, 06 Mar 2025 10:19:45 -0800 (PST) Received: from gourry-fedora-PF4VCD3F (pool-173-79-56-208.washdc.fios.verizon.net. [173.79.56.208]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4751db569f1sm10055721cf.80.2025.03.06.10.19.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Mar 2025 10:19:44 -0800 (PST) Date: Thu, 6 Mar 2025 13:19:41 -0500 From: Gregory Price To: Matthew Wilcox Cc: Bharata B Rao , linux-kernel@vger.kernel.org, linux-mm@kvack.org, AneeshKumar.KizhakeVeetil@arm.com, Hasan.Maruf@amd.com, Jonathan.Cameron@huawei.com, Michael.Day@amd.com, akpm@linux-foundation.org, dave.hansen@intel.com, david@redhat.com, feng.tang@intel.com, hannes@cmpxchg.org, honggyu.kim@sk.com, hughd@google.com, jhubbard@nvidia.com, k.shutemov@gmail.com, kbusch@meta.com, kmanaouil.dev@gmail.com, leesuyeon0506@gmail.com, leillc@google.com, liam.howlett@oracle.com, mgorman@techsingularity.net, mingo@redhat.com, nadav.amit@gmail.com, nphamcs@gmail.com, peterz@infradead.org, raghavendra.kt@amd.com, riel@surriel.com, rientjes@google.com, rppt@kernel.org, shivankg@amd.com, shy828301@gmail.com, sj@kernel.org, vbabka@suse.cz, weixugc@google.com, ying.huang@linux.alibaba.com, ziy@nvidia.com, dave@stgolabs.net, yuanchu@google.com, hyeonggon.yoo@sk.com Subject: Re: [RFC PATCH 1/4] mm: migrate: Allow misplaced migration without VMA too Message-ID: References: <20250306054532.221138-1-bharata@amd.com> <20250306054532.221138-2-bharata@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Thu, Mar 06, 2025 at 05:45:34PM +0000, Matthew Wilcox wrote: > On Thu, Mar 06, 2025 at 12:24:16PM -0500, Gregory Price wrote: > > we may also need this: > > https://lore.kernel.org/linux-mm/20250107000346.1338481-4-gourry@gourry.net/ > > > > May be worth just pulling these ahead to avoid conflict. > > Or not putting them in at all because this whole thing is a magnificent > waste of time? Divorced from the tiering mechanisms, is making misplaced migration able to migrate unmapped pages not generally useful? ~Gregory