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 C20F23812F6 for ; Sun, 27 Sep 2026 05:43:18 +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=1790487800; cv=none; b=oEFFOOMdNLMuK4lD5SMDP8VsoBFQDtwjYaDKZh4wWzIQu4JPecE0exUSlhsaF3U9dq1UtvznvH5RxR+tLWAX+AXpD4cH2MefrKq7PJD++GGRJqV7FFItIYSGNye+QKhbpbzpLFOa9Z64pLY6SARYCcPM1spCTzUaUOBJ8KvLoP8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790487800; c=relaxed/simple; bh=VhSdtmQHkPqKuXtoaAxBo5NlCAuf4kwMtSyRwvykeus=; h=Date:To:From:Subject:Message-Id; b=CqNChWY2IenHetCjQY4XuuN2Yj30ogk7u3pTvACNmxRgV5VeAYPQ0IokfzKSeBbTy/y3u0BJtcG4fiqBbZWaw1o5iWt7NN8jF1ptdaXxhGAvQxKPjoClXt591KmwS++mWTYiuelKkt3u/CT3oM1BkCrApb9eJFfmdlIaCOBV59U= 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=TCIRb1/C; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="TCIRb1/C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3E41F1F00893; Sun, 27 Sep 2026 05:43:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1790487798; bh=EG0xVjtGBkZmcOqQalmPvLiv9Tup04Ye/1NilZ47fzk=; h=Date:To:From:Subject; b=TCIRb1/CNn8bU4+8czhGA5XW7set5/hAo0NUk3oy+XZE+VOyDFyEgM+KMmepc319s Xf+wWgBT8DqhGFyCWs31gnE1PwQGHZgPkc29J1XHns0+wrm6pNOpGxRAvhCMNlQCwu JRT/lTnbeDl9GPbjaInA3syqWyB4vxt86fRcZJsM= Date: Sat, 26 Sep 2026 22:43:17 -0700 To: mm-commits@vger.kernel.org,songmuchun@bytedance.com,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] mm-sparse-vmemmap-open-code-init_compound_tail.patch removed from -mm tree Message-Id: <20260927054318.3E41F1F00893@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/sparse-vmemmap: open-code init_compound_tail() has been removed from the -mm tree. Its filename was mm-sparse-vmemmap-open-code-init_compound_tail.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: Muchun Song Subject: mm/sparse-vmemmap: open-code init_compound_tail() Date: Wed, 16 Sep 2026 14:43:33 +0800 init_compound_tail() is only used by vmemmap_shared_tail_page(), where the shared tail page setup intentionally passes NULL as the compound head. Keeping this helper in mm/internal.h exposes that special case to the rest of the MM code and can make the NULL head argument look generally valid. Open-code the initialization at the only call site so the special-case use stays local to sparse vmemmap optimization. No functional change intended. Link: https://lore.kernel.org/20260916064341.1825793-4-songmuchun@bytedance.com Signed-off-by: Muchun Song Signed-off-by: Andrew Morton Acked-by: Qi Zheng Acked-by: David Hildenbrand (Arm) Acked-by: Mike Rapoport (Microsoft) Cc: Jonathan Corbet Cc: Lorenzo Stoakes Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Oscar Salvador Cc: Randy Dunlap --- mm/internal.h | 9 --------- mm/sparse-vmemmap.c | 5 ++++- 2 files changed, 4 insertions(+), 10 deletions(-) --- a/mm/internal.h~mm-sparse-vmemmap-open-code-init_compound_tail +++ a/mm/internal.h @@ -786,15 +786,6 @@ static inline void prep_compound_tail(st VM_WARN_ON_ONCE(tail->private); } -static inline void init_compound_tail(struct page *tail, - const struct page *head, unsigned int order, struct zone *zone) -{ - atomic_set(&tail->_mapcount, -1); - set_page_node(tail, zone_to_nid(zone)); - set_page_zone(tail, zone_idx(zone)); - prep_compound_tail(tail, head, order); -} - #if defined CONFIG_COMPACTION || defined CONFIG_CMA /* --- a/mm/sparse-vmemmap.c~mm-sparse-vmemmap-open-code-init_compound_tail +++ a/mm/sparse-vmemmap.c @@ -189,7 +189,10 @@ struct page __ref *vmemmap_shared_tail_p for (int i = 0; i < PAGE_SIZE / sizeof(struct page); i++) { page = (struct page *)addr + i; mm_zero_struct_page(page); - init_compound_tail(page, NULL, order, zone); + atomic_set(&page->_mapcount, -1); + set_page_node(page, zone_to_nid(zone)); + set_page_zone(page, zone_idx(zone)); + prep_compound_tail(page, NULL, order); } page = virt_to_page(addr); _ Patches currently in -mm which might be from songmuchun@bytedance.com are mm-sparse-relax-struct-mem_section-size-constraints.patch mm-sparse-vmemmap-rename-hvo-order-macros.patch mm-mm_init-skip-initializing-shared-vmemmap-tail-pages.patch mm-sparse-vmemmap-initialize-shared-tail-vmemmap-pages-on-allocation.patch mm-sparse-vmemmap-support-section-based-vmemmap-accounting.patch mm-mm_init-factor-out-pfn_to_zone.patch mm-sparse-vmemmap-move-helpers-ahead-of-future-callers.patch mm-sparse-vmemmap-support-section-based-vmemmap-optimization.patch mm-sparse-initialize-memory-sections-earlier.patch mm-hugetlb-switch-hugetlb-to-section-based-vmemmap-optimization.patch mm-sparse-vmemmap-remove-sparsemem_vmemmap_preinit-support.patch mm-sparse-inline-usemap-allocation-into-sparse_init_nid.patch mm-sparse-remove-section_map_size.patch mm-hugetlb-remove-huge_bootmem_hvo.patch mm-hugetlb-remove-huge_bootmem_cma.patch mm-hugetlb-localize-struct-huge_bootmem_page.patch mm-hugetlb-localize-huge_bootmem_zones_valid.patch mm-sparse-vmemmap-prepare-dax-vmemmap-population-for-compound-page-orders.patch mm-sparse-vmemmap-set-compound-page-order-for-device-dax.patch mm-sparse-vmemmap-switch-device-dax-to-shared-tail-vmemmap-pages.patch mm-sparse-vmemmap-move-vmemmap-optimization-helpers-to-a-public-header.patch powerpc-mm-switch-device-dax-to-shared-tail-vmemmap-pages.patch mm-sparse-vmemmap-drop-the-extra-tail-page-from-device-dax-reservation.patch mm-sparse-vmemmap-drop-unused-section_nr_vmemmap_pages-arguments.patch documentation-mm-update-dax-vmemmap-deduplication-docs.patch