The quilt patch titled
Subject: mm/page_alloc: minor clean up for memmap_init_compound()
has been removed from the -mm tree. Its filename was
mm-page_alloc-minor-clean-up-for-memmap_init_compound.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/page_alloc: minor clean up for memmap_init_compound()
Date: Sat, 11 Jun 2022 10:13:52 +0800
Since commit 5232c63f46fd ("mm: Make compound_pincount always available"),
compound_pincount_ptr is stored at first tail page now. So we should call
prep_compound_head() after the first tail page is initialized to take
advantage of the likelihood of that tail struct page being cached given
that we will read them right after in prep_compound_head().
Link: https://lkml.kernel.org/r/20220611021352.13529-1-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Joao Martins <joao.m.martins@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
--- a/mm/page_alloc.c~mm-page_alloc-minor-clean-up-for-memmap_init_compound
+++ a/mm/page_alloc.c
@@ -6811,13 +6811,18 @@ static void __ref memmap_init_compound(s
set_page_count(page, 0);
/*
- * The first tail page stores compound_mapcount_ptr() and
- * compound_order() and the second tail page stores
- * compound_pincount_ptr(). Call prep_compound_head() after
- * the first and second tail pages have been initialized to
- * not have the data overwritten.
+ * The first tail page stores compound_mapcount_ptr(),
+ * compound_order() and compound_pincount_ptr(). Call
+ * prep_compound_head() after the first tail page have
+ * been initialized to not have the data overwritten.
+ *
+ * Note the idea to make this right after we initialize
+ * the offending tail pages is trying to take advantage
+ * of the likelihood of those tail struct pages being
+ * cached given that we will read them right after in
+ * prep_compound_head().
*/
- if (pfn == head_pfn + 2)
+ if (unlikely(pfn == head_pfn + 1))
prep_compound_head(head, order);
}
}
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
hugetlb_cgroup-remove-unneeded-nr_pages-0-check.patch
hugetlb_cgroup-hugetlbfs-use-helper-macro-sz_1kmg.patch
hugetlb_cgroup-remove-unneeded-return-value.patch
hugetlb_cgroup-use-helper-macro-numa_no_node.patch
hugetlb_cgroup-use-helper-for_each_hstate-and-hstate_index.patch
mm-hugetlb-fix-incorrect-update-of-max_huge_pages.patch
mm-hugetlb-fix-warn_onkobj-in-sysfs_create_group.patch
mm-hugetlb-fix-missing-call-to-restore_reserve_on_error.patch
mm-hugetlb-fix-missing-call-to-restore_reserve_on_error-v2.patch
mm-hugetlb_vmemmap-add-missing-smp_wmb-before-set_pte_at.patch
mm-hugetlb-fix-sysfs-group-leak-in-hugetlb_unregister_node.patch
mm-hugetlb-make-detecting-shared-pte-more-reliable.patch
mm-hwpoison-fix-page-refcnt-leaking-in-try_memory_failure_hugetlb.patch
mm-hwpoison-fix-page-refcnt-leaking-in-unpoison_memory.patch
mm-hwpoison-fix-extra-put_page-in-soft_offline_page.patch
mm-hwpoison-fix-possible-use-after-free-in-mf_dax_kill_procs-v2.patch
mm-hwpoison-kill-procs-if-unmap-fails.patch
mm-hwpoison-kill-procs-if-unmap-fails-v2.patch
mm-hwpoison-avoid-trying-to-unpoison-reserved-page.patch
mm-hwpoison-use-clearpagehwpoison-in-memory_failure.patch
mm-hwpoison-use-__pagemovable-to-detect-non-lru-movable-pages.patch
mm-hwpoison-use-__pagemovable-to-detect-non-lru-movable-pages-fix.patch
mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages.patch
mm-hwpoison-avoid-unneeded-page_mapped_in_vma-overhead-in-collect_procs_anon.patch
mm-hwpoison-check-pagetable-explicitly-in-hwpoison_user_mappings.patch
mm-hwpoison-cleanup-some-obsolete-comments.patch
hugetlb-make-hugetlb_cma_check-static.patch
hugetlb-use-helper-macro-sz_1k.patch
hugetlb-use-list_head-to-define-a-list-head.patch
hugetlb-use-sizeof-to-get-the-array-size.patch
hugetlb-use-helper-huge_ptepmd_lock.patch
hugetlb-pass-null-to-kobj_to_hstate-if-nid-is-unused.patch
hugetlb-kill-hugetlbfs_pagecache_page.patch
hugetlb-add-comment-for-subtle-sethpagevmemmapoptimized.patch
hugetlb-remove-meaningless-bug_onhuge_pte_none.patch
hugetlb-make-hugetlb-depends-on-sysfs-or-sysctl.patch
writeback-remove-unused-macro-dirty_full_scope.patch
