mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 22:34:33 +01:00
Qi Zheng
a5b981e63e
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/bd1b11bc1a13686aeba81a40194f87b369d62661.1769515122.git.zhengqi.arch@bytedance.com Signed-off-by: Qi Zheng <[email protected]> Cc: Huacai Chen <[email protected]> Cc: WANG Xuerui <[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: 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 Bogendoerfer <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: Wei Yang <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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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/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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#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
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#include <asm-generic/pgalloc.h>
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static inline void pmd_populate_kernel(struct mm_struct *mm,
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pmd_t *pmd, 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, 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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#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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#ifndef __PAGETABLE_PUD_FOLDED
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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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#endif /* __PAGETABLE_PUD_FOLDED */
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extern void pagetable_init(void);
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extern pgd_t *pgd_alloc(struct mm_struct *mm);
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
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{
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pte_t *pte = __pte_alloc_one_kernel(mm);
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if (pte)
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kernel_pte_init(pte);
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return pte;
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}
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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, 0);
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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, 0);
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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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#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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extern pte_t * __init populate_kernel_pte(unsigned long addr);
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#endif /* _ASM_PGALLOC_H */
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