mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-29 13:23:23 +01:00
Qi Zheng
6c8e95805d
On a 64-bit system, madvise(MADV_DONTNEED) may cause a large number of empty PTE page table pages (such as 100GB+). To resolve this problem, first enable MMU_GATHER_RCU_TABLE_FREE to prepare for enabling the PT_RECLAIM feature, which resolves this problem. Link: https://lkml.kernel.org/r/0d17f00a724f77aaca2da7c847acd490c3a47571.1769515122.git.zhengqi.arch@bytedance.com Signed-off-by: Qi Zheng <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: Andreas Larsson <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Anton Ivanov <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Dave Hansen <[email protected]> Cc: David Hildenbrand (Red Hat) <[email protected]> Cc: Dev Jain <[email protected]> Cc: Helge Deller <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Huacai Chen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Johannes Berg <[email protected]> Cc: Lance Yang <[email protected]> Cc: "Liam R. Howlett" <[email protected]> Cc: Lorenzo Stoakes <[email protected]> Cc: Magnus Lindholm <[email protected]> Cc: Matt Turner <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Nicholas Piggin <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Suren Baghdasaryan <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: WANG Xuerui <[email protected]> Cc: Wei Yang <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
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* Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_PGALLOC_H
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#define _ASM_PGALLOC_H
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#include <linux/highmem.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#define __HAVE_ARCH_PMD_ALLOC_ONE
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#define __HAVE_ARCH_PUD_ALLOC_ONE
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#include <asm-generic/pgalloc.h>
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
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pte_t *pte)
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{
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set_pmd(pmd, __pmd((unsigned long)pte));
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}
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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pgtable_t pte)
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{
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set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
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}
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/*
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* Initialize a new pmd table with invalid pointers.
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*/
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extern void pmd_init(void *addr);
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#ifndef __PAGETABLE_PMD_FOLDED
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static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
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{
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set_pud(pud, __pud((unsigned long)pmd));
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}
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#endif
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/*
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* Initialize a new pgd table with invalid pointers.
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*/
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extern void pgd_init(void *addr);
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extern pgd_t *pgd_alloc(struct mm_struct *mm);
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#define __pte_free_tlb(tlb, pte, address) tlb_remove_ptdesc((tlb), page_ptdesc(pte))
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#ifndef __PAGETABLE_PMD_FOLDED
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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pmd_t *pmd;
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struct ptdesc *ptdesc;
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ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, PMD_TABLE_ORDER);
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if (!ptdesc)
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return NULL;
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if (!pagetable_pmd_ctor(mm, ptdesc)) {
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pagetable_free(ptdesc);
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return NULL;
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}
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pmd = ptdesc_address(ptdesc);
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pmd_init(pmd);
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return pmd;
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}
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#define __pmd_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x))
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#endif
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#ifndef __PAGETABLE_PUD_FOLDED
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static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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pud_t *pud;
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struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL, PUD_TABLE_ORDER);
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if (!ptdesc)
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return NULL;
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pagetable_pud_ctor(ptdesc);
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pud = ptdesc_address(ptdesc);
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pud_init(pud);
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return pud;
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}
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static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
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{
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set_p4d(p4d, __p4d((unsigned long)pud));
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}
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#define __pud_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x))
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#endif /* __PAGETABLE_PUD_FOLDED */
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#endif /* _ASM_PGALLOC_H */
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