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 9B5ADCD37B5 for ; Mon, 11 May 2026 08:54:35 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 106916B00B6; Mon, 11 May 2026 04:54:35 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0DE436B00B8; Mon, 11 May 2026 04:54:35 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F36706B00B9; Mon, 11 May 2026 04:54:34 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id E44D56B00B6 for ; Mon, 11 May 2026 04:54:34 -0400 (EDT) Received: from smtpin11.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 8550D140606 for ; Mon, 11 May 2026 08:54:34 +0000 (UTC) X-FDA: 84754528068.11.88E24C8 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf03.hostedemail.com (Postfix) with ESMTP id 5D3F22000D for ; Mon, 11 May 2026 08:54:32 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=DKm3U3g4; dmarc=pass (policy=quarantine) header.from=redhat.com; spf=pass (imf03.hostedemail.com: domain of mst@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=mst@redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1778489672; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=43zcPeyEBahcbXzXBePbjbHiq0vh8NFM/GDJyyFYelY=; b=TOAKblHnmGsLccrYtPbQoobIoRgjbha7ruKZswikBxpS2mdTPIBwlwqzvaSU7+0iXgMpUj Eg5AGaVkWn3jZTowRRMHBYlSjJOWyjUeO8+22YNFsT66qzrTkZw9yustSydBE77LDYsSZJ ndu1yn4vtprAPNXOb0j+sYqmjuAacN0= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1778489672; a=rsa-sha256; cv=none; b=VqNSEKcG1MhewzofA/1TdKOlC1UvLQfA3qeOKM7oUaFBLQmMgu5TvEoyV/Xr6TY87HjR2G cPH4EIipQHhsSRGFcXKtfsE0mfxz/BqxhR+KsD8C8icoSetfOnKASyCagQKiai0kz7RIX+ 14cNFQNtDOcA9xI/luvHiNSBHK0U6Jc= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=DKm3U3g4; dmarc=pass (policy=quarantine) header.from=redhat.com; spf=pass (imf03.hostedemail.com: domain of mst@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=mst@redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1778489671; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=43zcPeyEBahcbXzXBePbjbHiq0vh8NFM/GDJyyFYelY=; b=DKm3U3g4cOzdPmFnYpPO85gPh+4r2uQr+xE9prnGY1epa88LFjzkd4ruf+TWrRv0w9ARIi Q3h1YuUUf5i8PNf3CAld/FBnI8cKHn3n6JqhXTX8g8t6UN+UpjM9FFvEAjjslP3C9ckeQm PZRtGGif/jy9HRyiKtVD4ALIAiIfil0= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-635-hND-Oq7pNvKDdswtPnJTsQ-1; Mon, 11 May 2026 04:54:30 -0400 X-MC-Unique: hND-Oq7pNvKDdswtPnJTsQ-1 X-Mimecast-MFC-AGG-ID: hND-Oq7pNvKDdswtPnJTsQ_1778489669 Received: by mail-wm1-f69.google.com with SMTP id 5b1f17b1804b1-48e6af7a9cdso16387785e9.3 for ; Mon, 11 May 2026 01:54:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778489669; x=1779094469; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=43zcPeyEBahcbXzXBePbjbHiq0vh8NFM/GDJyyFYelY=; b=DU3kE0LzXJwCdP9BlCjhCHV4FKoARHRwHLrbUkEurKJ6ZESTxCqgcHKzXBlUmfmkbP D8ElgOlQqsV8DcoR4ZB6jw9uUSYjhb7wvzcfOhQyKFsR8KH7sUyrUrZokpJEhbaHfy8J vIFOonP6bXWQp0VWH64NDYMzQhikfVFfu3FEaRx6XjMlLWs+Kk4E1/8T62QXXfYgFqaE 72HIlUonHuNKZSn3HYDT9Y8Aj6tyP93bdQ2vEaHJQQkFvF9m6tXqRZkhD7PhJnYLLLu8 yJ01nG1kb4m/ixzmI+kVhKmWg9qHzmfAD9YszMU9RXb5oiNNR6L8D7LyhUoSkBngtFCB rwow== X-Forwarded-Encrypted: i=1; AFNElJ9QS/P+ZsH7otRJiHFz4RzGF+TbDn0B0ENrqLCpUSTYStqtq+B4fZbcDHU5qJkPiOMO0LAAKNHWhg==@kvack.org X-Gm-Message-State: AOJu0YzXQTls2AMeX8QlrsMcsnt1RMPgq3Kr/XVa/Kv/+vaFbHZWh63A CbDrzaqvuEyIXyUX5NwW3lylIYb/YvLqw4MPxWD4VJ26KgzLjO/JEJpJrJjUIJ0nNivAdO3dWtM ksT+TvKBw//CLBOxNltr7fC0Vm+r8mB8/5OBkVPf4oBat/2a7e2jq X-Gm-Gg: Acq92OHwpv1HJSE9j2mztNJ6tUXtPcQcLTUeifN+4Yj5xTWWLecuba5ixYs0905EebO E9WKX8OBZbKmLAo6TB65WCpRIpUunudkzILzgtdIZvn8JtmqtirxzQ+oXLtX/oWwvSxd8O98fiH GAJk5Fy/vsqk5BVAbykZ86Ct7fCc9E4KtBo064J9RHUZ+EmRdQIr/YPTH1EmYAmbc1aPmyizoSe ZSLuzG46vteQOzI6jWh+40SDbx+ekR+QDKsZoJfVyFLxO7MMoRVgNoZVumNIz4HXG1MN10eThRZ GqmXdaM3oMWmvEooByVjhq/ZE7j0Hni1/hkPxggOchfbPDb1PqqvSHwwwbr98iQS9Bim8b/nHDy ZADn3zal/eMzOY1tancBQEJs6Ua3kGxv6RqqFmJ6/ X-Received: by 2002:a05:600c:8b57:b0:48e:75fd:9f9e with SMTP id 5b1f17b1804b1-48e75fda826mr127047515e9.20.1778489669165; Mon, 11 May 2026 01:54:29 -0700 (PDT) X-Received: by 2002:a05:600c:8b57:b0:48e:75fd:9f9e with SMTP id 5b1f17b1804b1-48e75fda826mr127046835e9.20.1778489668599; Mon, 11 May 2026 01:54:28 -0700 (PDT) Received: from redhat.com (IGLD-80-230-48-7.inter.net.il. [80.230.48.7]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48e6d8d30dbsm91516415e9.1.2026.05.11.01.54.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 May 2026 01:54:28 -0700 (PDT) Date: Mon, 11 May 2026 04:54:23 -0400 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: "David Hildenbrand (Arm)" , Jason Wang , Xuan Zhuo , Eugenio =?utf-8?B?UMOpcmV6?= , 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 , "Liam R. Howlett" Subject: [PATCH v6 13/30] mm: use __GFP_ZERO in vma_alloc_anon_folio_pmd Message-ID: References: MIME-Version: 1.0 In-Reply-To: X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: seSd9iDXLSnGM0zSUzryisESTgcbQ-3NUFhzSAsMN4U_1778489669 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 5D3F22000D X-Stat-Signature: do69rz9tresmiutomwk7gqmgg74kmjfs X-Rspam-User: X-HE-Tag: 1778489672-416907 X-HE-Meta: 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 9XmrEqs3 Z90zR7TK6W43fFkK61+Y4oQkltBmuqXW9FzlLin5m6ffYlK7ITMVZQjGZDVVnyjlMIcsTqMa9Lnw0SYBh2CNyfou0nkznVyepNh0UdM00zNx9BQ9LSYyZljn1onGcdwB1NWsag0wVwpee3HqXrAArIyYi+MxfkNA/GxHfNJZ+VGkBXtW0NxuYy6UuGu270QpzqxEsJZBxT/Pkbd2kaCrqnT2JK6jew22ZjQ7yCc2JzU42D54mwsp9kdSfaIbZYq1DKrBVBRnSyQ0e7XTkX+GIJlzGF1FJDvfraEhp2u/jI7PPkKHyxfvzW2xDkv03FGBT4m8Qnasotx4yKq6o3j/ys54hxQwX3FLXpc+nO+mrfZAf4uCPnWm2pze9q5HqddfylrQWj+qKfE5qKkddmo/2d0Wb+cMkeTcI7LY13C7BDSAr29Ldovye9wER1MPE5zLRQ5Rz Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Convert vma_alloc_anon_folio_pmd() to pass __GFP_ZERO instead of zeroing at the callsite. post_alloc_hook uses the fault address passed through vma_alloc_folio for cache-friendly zeroing. Signed-off-by: Michael S. Tsirkin Assisted-by: Claude:claude-opus-4-6 --- mm/huge_memory.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index d689e6491ddb..9845c920c29c 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1333,7 +1333,7 @@ EXPORT_SYMBOL_GPL(thp_get_unmapped_area); static struct folio *vma_alloc_anon_folio_pmd(struct vm_area_struct *vma, unsigned long addr) { - gfp_t gfp = vma_thp_gfp_mask(vma); + gfp_t gfp = vma_thp_gfp_mask(vma) | __GFP_ZERO; const int order = HPAGE_PMD_ORDER; struct folio *folio; @@ -1356,14 +1356,6 @@ static struct folio *vma_alloc_anon_folio_pmd(struct vm_area_struct *vma, } folio_throttle_swaprate(folio, gfp); - /* - * When a folio is not zeroed during allocation (__GFP_ZERO not used) - * or user folios require special handling, folio_zero_user() is used to - * make sure that the page corresponding to the faulting address will be - * hot in the cache after zeroing. - */ - if (user_alloc_needs_zeroing()) - folio_zero_user(folio, addr); /* * The memory barrier inside __folio_mark_uptodate makes sure that * folio_zero_user writes become visible before the set_pmd_at() -- MST