From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 338CB142E6F for ; Sat, 10 Aug 2024 06:19:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723270761; cv=none; b=RZIQzFbGSqtqUfhyefu2TTJ5s09DGJ4jh15rWlGJLFl5Pq0v1D2U6qmUvxEyS2o6THRs+CV6jzmRXK8JOmGqrkxU8jAZPjK7UwRPsUupQgryWOqU7DLacxJ17scN9NHYXmzihWk+XavGEqPSGxOQYtIlQX0i7RGhIMC+l1GIK/k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723270761; c=relaxed/simple; bh=g4yFGvZMSCh3qiE5QiEM0bI0mM7qm2ObmfqT12Rnrn4=; h=Date:To:From:Subject:Message-Id; b=tWdUj/gtuZ8VHfbZkokLmSV864ogOVHcFHHULoYcUEsS5EEA0Y99KDR1RIb8omx3ESxLR4fJzzeF14PlbN/Aieiyqcz1orgkNugFmJkwguMZzzX/i6+9RLiuPszzc5/bnYMh1qw6sVFST8uaohq4Pwmy2Zk2IntEY/JBWdf4geg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=DuU2+B6c; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="DuU2+B6c" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2DF1C32781; Sat, 10 Aug 2024 06:19:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1723270760; bh=g4yFGvZMSCh3qiE5QiEM0bI0mM7qm2ObmfqT12Rnrn4=; h=Date:To:From:Subject:From; b=DuU2+B6cGsk4DKwE5xo2GsCZNG8E7FuoYbk66elVkhW9MlLjttXTgTkEernpcpg5y 0zHGgoj2cgBN+wvcV8rQ8WBzVr9vg5EAamYkHJWlBvooqjoZPlntSidBLF8Zki50L7 KCdodDr++ooaScI1esb3uvVsICssY7Z1rx5Y2ziQ= Date: Fri, 09 Aug 2024 23:19:20 -0700 To: mm-commits@vger.kernel.org,willy@infradead.org,vbabka@suse.cz,thomas.lendacky@amd.com,rppt@kernel.org,mgorman@suse.de,hannes@cmpxchg.org,david@redhat.com,bp@alien8.de,kirill.shutemov@linux.intel.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-introduce-pageunaccepted-page-type.patch added to mm-unstable branch Message-Id: <20240810061920.C2DF1C32781@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm: introduce PageUnaccepted() page type has been added to the -mm mm-unstable branch. Its filename is mm-introduce-pageunaccepted-page-type.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-introduce-pageunaccepted-page-type.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: "Kirill A. Shutemov" Subject: mm: introduce PageUnaccepted() page type Date: Fri, 9 Aug 2024 14:48:50 +0300 The new page type allows physical memory scanners to detect unaccepted memory and handle it accordingly. The page type is serialized with zone lock. Link: https://lkml.kernel.org/r/20240809114854.3745464-5-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov Acked-by: David Hildenbrand Cc: Borislav Petkov Cc: Johannes Weiner Cc: Matthew Wilcox Cc: Mel Gorman Cc: Mike Rapoport (Microsoft) Cc: Tom Lendacky Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- include/linux/page-flags.h | 8 ++++++++ mm/page_alloc.c | 2 ++ 2 files changed, 10 insertions(+) --- a/include/linux/page-flags.h~mm-introduce-pageunaccepted-page-type +++ a/include/linux/page-flags.h @@ -939,6 +939,7 @@ enum pagetype { PG_hugetlb = 0x04000000, PG_slab = 0x02000000, PG_zsmalloc = 0x01000000, + PG_unaccepted = 0x00800000, PAGE_TYPE_BASE = 0x80000000, @@ -1072,6 +1073,13 @@ FOLIO_TEST_FLAG_FALSE(hugetlb) PAGE_TYPE_OPS(Zsmalloc, zsmalloc, zsmalloc) +/* + * Mark pages that has to be accepted before touched for the first time. + * + * Serialized with zone lock. + */ +PAGE_TYPE_OPS(Unaccepted, unaccepted, unaccepted) + /** * PageHuge - Determine if the page belongs to hugetlbfs * @page: The page to test. --- a/mm/page_alloc.c~mm-introduce-pageunaccepted-page-type +++ a/mm/page_alloc.c @@ -6972,6 +6972,7 @@ static bool try_to_accept_memory_one(str account_freepages(zone, -MAX_ORDER_NR_PAGES, MIGRATE_MOVABLE); __mod_zone_page_state(zone, NR_UNACCEPTED, -MAX_ORDER_NR_PAGES); + __ClearPageUnaccepted(page); spin_unlock_irqrestore(&zone->lock, flags); accept_page(page, MAX_PAGE_ORDER); @@ -7030,6 +7031,7 @@ static bool __free_unaccepted(struct pag list_add_tail(&page->lru, &zone->unaccepted_pages); account_freepages(zone, MAX_ORDER_NR_PAGES, MIGRATE_MOVABLE); __mod_zone_page_state(zone, NR_UNACCEPTED, MAX_ORDER_NR_PAGES); + __SetPageUnaccepted(page); spin_unlock_irqrestore(&zone->lock, flags); if (first) _ Patches currently in -mm which might be from kirill.shutemov@linux.intel.com are mm-fix-endless-reclaim-on-machines-with-unaccepted-memory.patch mm-reduce-deferred-struct-page-init-ifdeffery.patch mm-accept-memory-in-__alloc_pages_bulk.patch mm-introduce-pageunaccepted-page-type.patch mm-rework-accept-memory-helpers.patch mm-add-a-helper-to-accept-page.patch mm-page_isolation-handle-unaccepted-memory-isolation.patch mm-accept-to-promo-watermark.patch