From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 13073CD4851 for ; Wed, 13 May 2026 07:36:26 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 16B4F6B0005; Wed, 13 May 2026 03:36:25 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 11C416B008A; Wed, 13 May 2026 03:36:25 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 00B3F6B008C; Wed, 13 May 2026 03:36:24 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id E28496B0005 for ; Wed, 13 May 2026 03:36:24 -0400 (EDT) Received: from smtpin09.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 96E86407B5 for ; Wed, 13 May 2026 07:36:23 +0000 (UTC) X-FDA: 84761588646.09.9D272B7 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf27.hostedemail.com (Postfix) with ESMTP id 978B340002 for ; Wed, 13 May 2026 07:36:21 +0000 (UTC) Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=L8zG3dE+; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf27.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=1778657781; 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=XugxigCjCqUDBKKoyrINMo5VGJW2Ci7qQY3REJmjX7c=; b=e3jmvqXie/WHREP+cC52MsyTAVN4r70XSMVGrqUdS5YNSbfxbnNR408OhI8Xa1JDDrvgu6 NoT0W3NaSf36MBO6H+HUQbxW8aFXI/vbL/ehZF0WCduUASkeGMwbQEhiNtysb5+i1KLJS8 72S1Zm04iJLbo2yYO+n/qIG9t6g+DgU= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1778657781; a=rsa-sha256; cv=none; b=zqtX0g9I7E/66yRa0If7YOIYXZFsGUSs997BJywWavQfQYaEkmMeAGMNSsiNazK7r13Opa VNkio5jZUjOQMiXSCDJCvwsvUyflPhwQGT6RVbILsd3OLSVqROOvpiP2CeeXPEcbOdL9K7 L39dB4HnEeBsteD+prhaToL6fqwOMrg= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=L8zG3dE+; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf27.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 6E26F43DA1; Wed, 13 May 2026 07:36:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 94552C2BCB7; Wed, 13 May 2026 07:36:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778657780; bh=vLsbboLlHeO2mJITfXZX206T+M8KqwAaBTQYO+UyOug=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=L8zG3dE+OeUEavwTv6BTWbVjH9YUqVwyLQTIasOjFV1ekneg/AsXWUg2znRC4HZBm /9ab8RVKzuGgZFNnQTi1PT3Blkni5X7AcZqulqJcBTSS/+NmNt5sz7xbIGRCIF3RZo b9JWF/ehMlFwCJA4B655aVRATWZCByPxFWZ9gmk+AGDYi2OeZgNAwZVapoPRR3RBWL vWSL8mnyV1UxFY7BgpokNf4qhuOrXOQVIZRNbNBe2XNevxMbNdF2F5M2EypZhEYKbI A7J2HyleSWdX/KlAM5ysvtQQ0pLEBF8QGDUNGrl5oaV+Z+dfakMeL1rOhFqmhZEwWX s6jSLesNY1EhA== Message-ID: Date: Wed, 13 May 2026 09:36:06 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 00/31] mm/virtio: skip redundant zeroing of host-zeroed pages To: "Michael S. Tsirkin" , linux-kernel@vger.kernel.org Cc: Jason Wang , Xuan Zhuo , =?UTF-8?Q?Eugenio_P=C3=A9rez?= , Muchun Song , Oscar Salvador , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Hugh Dickins , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Christoph Lameter , David Rientjes , Roman Gushchin , Harry Yoo , Axel Rasmussen , Yuanchu Xie , Wei Xu , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , virtualization@lists.linux.dev, linux-mm@kvack.org, Andrea Arcangeli References: 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: 7bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 978B340002 X-Stat-Signature: e5ar65keggo5rm4cpj7r14xsejum4t98 X-Rspam-User: X-HE-Tag: 1778657781-473377 X-HE-Meta: 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 vbq7sXfp f74cj/1d8y03KV5IXXgs0JKuI85KLnBLhaVY2WbDBuEb23uEJnfgbw1p1HnONHTIO1r820wNAz01ff12BZxZoiRmsPpnW/3VEay2Xg2JkDx6rBHu/2t/GfQOYzCV5547Iuoix4EZoc1dXXCZZXARMOvi5X6ItE1pt6n0hnutq5lF4SFBfOcv46sTao8eL0G1nabUb5W5wDOFNWx543wNG92vt0Wgx2IVdG8lM0V8QQpsrzDdE0jPvoo96NTn+6ihiue8UNGUXu1wSr46u5CG2INUTuO/nYTjcuK2O95ODN4VgMZhJLoDGTC3020zYmjplLBENgYlpLWtBlVo= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > Changes since v6 (address review by Gregory Price): > - Rework hugetlb: use gfp_t parameter instead of bool zero / > bool *zeroed. Sink zeroing inside alloc_hugetlb_folio(). > Pass raw fault address (user_addr) for cache-friendly zeroing > on both pool-page and fresh allocation > paths. (Suggested by Gregory Price) > - Reorder compaction_alloc_noprof() to call prep_compound_page > before post_alloc_hook for consistency. > (Suggested by Gregory Price) > - Reorder: interleave fix first, PageReported propagation and > capacity fix moved to front as dependencies. > - Add USER_ADDR_NONE comments in mmap.c and internal.h explaining why -1 is > never a valid userspace address. > - Fix err uninitialized warning in virtballoon_free_page_report(). > - Lots of commit log tweaks. > > Also in v7: > - Fix hugetlb pool page zeroing to use vmf->real_address > (the actual faulting subpage) instead of vmf->address > (hugepage-aligned), preserving cache-friendly zeroing > locality that upstream had at the callsite. > - Remove dead/broken alloc_hugetlb_folio !CONFIG_HUGETLB_PAGE > stub (returned NULL but callers check IS_ERR). Please wait at least a week before sending out new versions of this size. It's just a lot of noise in people's inbox, and as raised, a lot of people won't manage to review this before next month. -- Cheers, David