From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E96145DF6C; Thu, 10 Sep 2026 10:57:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789037831; cv=none; b=crxvrFZkmY91w97duxRlCxPIFHhjoDiHAR+0U3xlXu4x2ixlcPD9P9SEwBttfHqm2MWUU47DuXRn9kGZtFWXGFUp9fMDMomo7EKsL4G/e8nYbn7QejtaAJ1D0unGXAonLAeaJecox3NHb+0UASnbUDD1RTOLzstBWGsH/ssAkIc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789037831; c=relaxed/simple; bh=kvAMh//qzFyr59ZzKLHP+/ecQZnfn+YJ/B1zHlv6DBE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Q6lmvhIGDfV9GWXX0B1q9p0gvndHoNyBy8roP/jn4WpJgAsztK4bjTWu0cVrMu2i+S2r6apbJLL/JA1ls37nJeJkVk2MOQ/WD2OWhI2w4yimqZKOx9J9fcvg7MnrFHUwDbPaiYULV6Q+Wt0j6LwnTA5iFCllkgEwLGqhmkZqv10= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eK8zViyI; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eK8zViyI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1FBD11F00893; Thu, 10 Sep 2026 10:56:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789037829; bh=GxlyEAD3OjzkL84LXM7QY5JNpJtiOF5Zyguxd2EmB9s=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=eK8zViyIm/bW0+IG/megvvXAxtIOAaGbbA0fXts46bTz2Ah3auqf2tX9g6vhwKlQG oK7093vyOD0v6JMIWihPbQAbYKJX4WDIBaErdJiA7WGxfdwj4YLTMKLWylzHSskruX IPNal/2lHXurLSF3Z+IWE0cQk3o2xs4Bi5jUSG7ufNcw8EmGp4dCFLaWv28ZF965vu JNP7Q5hdqlha0dYFpTJv5w6D5RvvMoaWQduNtQP7puWp0H1By3u/FOFSKzeYxeEL2h 48EdKDIn+oz9XUmzGq7/S/AQlqJOqbyqxqY9ezMkf3BCL6yzH+frRR/qE1dwI6gMe5 njJFo5DYT61nA== Message-ID: <5ca344de-bc34-4a9b-ab85-f553811a1d9c@kernel.org> Date: Thu, 10 Sep 2026 12:56:57 +0200 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Path forward for Virtualized Swap? To: Nhat Pham Cc: Kairui Song , Chris Li , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Yosry Ahmed , Muchun Song , Kemeng Shi , Baoquan He , Barry Song , YoungJun Park , Chengming Zhou , "Lorenzo Stoakes (Oracle)" , "Liam R. Howlett" , "Vlastimil Babka (SUSE)" , Mike Rapoport , =?UTF-8?Q?Suren_Baghdasaryan=EF=BF=BC?= , Qi Zheng , Axel Rasmussen , Yuanchu Xie , Wei Xu , Rik van Riel , Gregory Price , Wenchao Hao , Jonathan Corbet , Hugh Dickins , Baolin Wang , Tejun Heo , =?UTF-8?Q?Michal_Koutn=C3=BD?= , Shuah Khan , Kunwu Chan , Meta kernel team , Linux Memory Management List , Linux Kernel Mailing List , linux-doc@vger.kernel.org, "open list:CONTROL GROUP - MEMORY RESOURCE CONTROLLER (MEMCG)" , Andrew Morton , Kairui Song , Joshua Hahn References: <5fdb3777-95a2-48f9-bb38-aa4ba3c96a81@kernel.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 9/8/26 18:45, Nhat Pham wrote: > On Mon, Sep 7, 2026 at 4:30 AM David Hildenbrand (Arm) wrote: >> >> On 9/4/26 23:14, Nhat Pham wrote: >> >> Hi, >> >>> To Kairui, Johannes, Yosry, Chris, David, Andrew, and other (z)swap folks - >>> I need some help here. >> >> I'll mostly ignore swap-related stuff because (a) -EBUSY and (b) we have quite >> some swap experts around :) >> >> Reading below, I do wonder if the swap subsystem needs some more coordination >> and collaboration? >> >> For example, maybe having bi-weekly/monthly meetings to get everybody aligned >> and uptodate could be something reasonable? >> >> This approach has proven fairly helpful in areas where (1) multiple companies >> are involved (2) many concurrent development is happening, and (3) people have >> different priorities and requirements. >> >> Is there already something like that to organize development? Should we get >> started with that? > > Hi David! Hi! > > Thank you for your suggestions :) More collaboration and communication > is definitely needed here. Conference is a good place for this, but > it's not something we can do very frequently, and many folks could not > attend (visa issues, etc.). Right, and conferences usually don't have the capacity to squeeze too many swap-related topics in, so it would have to be side discussions or BOFs. > > A bi-weekly/monthly series of meetings sound very appealing. Swap > contributors are very spread out (China, NorAm, Europe, etc.), so > coordination will be tricky, but let us figure out something. Yes, that's an issue. I'd suggest swap maintainers take care of that if they agree. I could try as well, but it's rather tricky right now on my end ... As an alternative, we could also use on/two/ ... slots in the bi-weekly MM alignment session to talk about swap. (I'd be happy to learn more about all this as well) -- Cheers, David