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15 hotfixes. 11 marked cc:stable. Only three or four of the latter
address post-6.0 issues, which is hopefully a sign that things are converging. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCY4pQpQAKCRDdBJ7gKXxA jquxAP9Lqif7CGDgdq8uWY2hHS/Ujc3k7Ohgyzs37olnCuU8KwEA6/J7SpjsBgtY OfzvnwxpCTh8Kfzu/oNckIHo/EEiIA8= =o6qT -----END PGP SIGNATURE----- Merge tag 'mm-hotfixes-stable-2022-12-02' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc hotfixes from Andrew Morton: "15 hotfixes, 11 marked cc:stable. Only three or four of the latter address post-6.0 issues, which is hopefully a sign that things are converging" * tag 'mm-hotfixes-stable-2022-12-02' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: revert "kbuild: fix -Wimplicit-function-declaration in license_is_gpl_compatible" Kconfig.debug: provide a little extra FRAME_WARN leeway when KASAN is enabled drm/amdgpu: temporarily disable broken Clang builds due to blown stack-frame mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths mm/khugepaged: fix GUP-fast interaction by sending IPI mm/khugepaged: take the right locks for page table retraction mm: migrate: fix THP's mapcount on isolation mm: introduce arch_has_hw_nonleaf_pmd_young() mm: add dummy pmd_young() for architectures not having it mm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes() tools/vm/slabinfo-gnuplot: use "grep -E" instead of "egrep" nilfs2: fix NULL pointer dereference in nilfs_palloc_commit_free_entry() hugetlb: don't delete vma_lock in hugetlb MADV_DONTNEED processing madvise: use zap_page_range_single for madvise dontneed mm: replace VM_WARN_ON to pr_warn if the node is offline with __GFP_THISNODE
This commit is contained in:
Linus Torvalds
commit
bdaa78c6aa
@ -490,6 +490,7 @@ static inline pmd_t pmd_mkdirty(pmd_t pmd)
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return pmd;
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}
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#define pmd_young pmd_young
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static inline int pmd_young(pmd_t pmd)
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{
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return !!(pmd_val(pmd) & _PAGE_ACCESSED);
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@ -622,6 +622,7 @@ static inline pmd_t pmd_mkdirty(pmd_t pmd)
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return pmd;
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}
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#define pmd_young pmd_young
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static inline int pmd_young(pmd_t pmd)
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{
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return !!(pmd_val(pmd) & _PAGE_ACCESSED);
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@ -600,6 +600,7 @@ static inline int pmd_dirty(pmd_t pmd)
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return pte_dirty(pmd_pte(pmd));
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}
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#define pmd_young pmd_young
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static inline int pmd_young(pmd_t pmd)
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{
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return pte_young(pmd_pte(pmd));
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@ -763,6 +763,7 @@ static inline int pmd_dirty(pmd_t pmd)
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return (pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY) != 0;
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}
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#define pmd_young pmd_young
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static inline int pmd_young(pmd_t pmd)
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{
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return (pmd_val(pmd) & _SEGMENT_ENTRY_YOUNG) != 0;
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@ -693,6 +693,7 @@ static inline unsigned long pmd_dirty(pmd_t pmd)
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return pte_dirty(pte);
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}
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#define pmd_young pmd_young
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static inline unsigned long pmd_young(pmd_t pmd)
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{
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pte_t pte = __pte(pmd_val(pmd));
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@ -139,6 +139,7 @@ static inline int pmd_dirty(pmd_t pmd)
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return pmd_flags(pmd) & _PAGE_DIRTY;
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}
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#define pmd_young pmd_young
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static inline int pmd_young(pmd_t pmd)
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{
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return pmd_flags(pmd) & _PAGE_ACCESSED;
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@ -1438,6 +1439,14 @@ static inline bool arch_has_hw_pte_young(void)
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return true;
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}
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#ifdef CONFIG_XEN_PV
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#define arch_has_hw_nonleaf_pmd_young arch_has_hw_nonleaf_pmd_young
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static inline bool arch_has_hw_nonleaf_pmd_young(void)
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{
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return !cpu_feature_enabled(X86_FEATURE_XENPV);
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}
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#endif
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#ifdef CONFIG_PAGE_TABLE_CHECK
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static inline bool pte_user_accessible_page(pte_t pte)
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{
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@ -5,6 +5,7 @@ menu "Display Engine Configuration"
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config DRM_AMD_DC
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bool "AMD DC - Enable new display engine"
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default y
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depends on BROKEN || !CC_IS_CLANG || X86_64 || SPARC64 || ARM64
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select SND_HDA_COMPONENT if SND_HDA_CORE
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select DRM_AMD_DC_DCN if (X86 || PPC_LONG_DOUBLE_128)
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help
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@ -12,6 +13,12 @@ config DRM_AMD_DC
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support for AMDGPU. This adds required support for Vega and
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Raven ASICs.
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calculate_bandwidth() is presently broken on all !(X86_64 || SPARC64 || ARM64)
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architectures built with Clang (all released versions), whereby the stack
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frame gets blown up to well over 5k. This would cause an immediate kernel
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panic on most architectures. We'll revert this when the following bug report
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has been resolved: https://github.com/llvm/llvm-project/issues/41896.
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config DRM_AMD_DC_DCN
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def_bool n
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help
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@ -111,6 +111,13 @@ static void nilfs_dat_commit_free(struct inode *dat,
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kunmap_atomic(kaddr);
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nilfs_dat_commit_entry(dat, req);
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if (unlikely(req->pr_desc_bh == NULL || req->pr_bitmap_bh == NULL)) {
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nilfs_error(dat->i_sb,
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"state inconsistency probably due to duplicate use of vblocknr = %llu",
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(unsigned long long)req->pr_entry_nr);
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return;
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}
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nilfs_palloc_commit_free_entry(dat, req);
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}
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@ -222,12 +222,16 @@ extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
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#define tlb_needs_table_invalidate() (true)
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#endif
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void tlb_remove_table_sync_one(void);
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#else
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#ifdef tlb_needs_table_invalidate
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#error tlb_needs_table_invalidate() requires MMU_GATHER_RCU_TABLE_FREE
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#endif
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static inline void tlb_remove_table_sync_one(void) { }
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#endif /* CONFIG_MMU_GATHER_RCU_TABLE_FREE */
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@ -210,6 +210,20 @@ alloc_pages_bulk_array_node(gfp_t gfp, int nid, unsigned long nr_pages, struct p
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return __alloc_pages_bulk(gfp, nid, NULL, nr_pages, NULL, page_array);
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}
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static inline void warn_if_node_offline(int this_node, gfp_t gfp_mask)
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{
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gfp_t warn_gfp = gfp_mask & (__GFP_THISNODE|__GFP_NOWARN);
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if (warn_gfp != (__GFP_THISNODE|__GFP_NOWARN))
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return;
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if (node_online(this_node))
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return;
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pr_warn("%pGg allocation from offline node %d\n", &gfp_mask, this_node);
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dump_stack();
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}
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/*
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* Allocate pages, preferring the node given as nid. The node must be valid and
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* online. For more general interface, see alloc_pages_node().
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@ -218,7 +232,7 @@ static inline struct page *
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__alloc_pages_node(int nid, gfp_t gfp_mask, unsigned int order)
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{
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VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES);
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VM_WARN_ON((gfp_mask & __GFP_THISNODE) && !node_online(nid));
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warn_if_node_offline(nid, gfp_mask);
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return __alloc_pages(gfp_mask, order, nid, NULL);
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}
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@ -227,7 +241,7 @@ static inline
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struct folio *__folio_alloc_node(gfp_t gfp, unsigned int order, int nid)
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{
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VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES);
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VM_WARN_ON((gfp & __GFP_THISNODE) && !node_online(nid));
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warn_if_node_offline(nid, gfp);
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return __folio_alloc(gfp, order, nid, NULL);
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}
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@ -2,8 +2,6 @@
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#ifndef __LICENSE_H
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#define __LICENSE_H
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#include <linux/string.h>
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static inline int license_is_gpl_compatible(const char *license)
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{
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return (strcmp(license, "GPL") == 0
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@ -1852,6 +1852,25 @@ static void __maybe_unused show_free_areas(unsigned int flags, nodemask_t *nodem
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__show_free_areas(flags, nodemask, MAX_NR_ZONES - 1);
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}
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/*
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* Parameter block passed down to zap_pte_range in exceptional cases.
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*/
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struct zap_details {
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struct folio *single_folio; /* Locked folio to be unmapped */
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bool even_cows; /* Zap COWed private pages too? */
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zap_flags_t zap_flags; /* Extra flags for zapping */
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};
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/*
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* Whether to drop the pte markers, for example, the uffd-wp information for
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* file-backed memory. This should only be specified when we will completely
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* drop the page in the mm, either by truncation or unmapping of the vma. By
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* default, the flag is not set.
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*/
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#define ZAP_FLAG_DROP_MARKER ((__force zap_flags_t) BIT(0))
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/* Set in unmap_vmas() to indicate a final unmap call. Only used by hugetlb */
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#define ZAP_FLAG_UNMAP ((__force zap_flags_t) BIT(1))
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#ifdef CONFIG_MMU
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extern bool can_do_mlock(void);
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#else
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@ -1869,6 +1888,8 @@ void zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,
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unsigned long size);
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void zap_page_range(struct vm_area_struct *vma, unsigned long address,
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unsigned long size);
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void zap_page_range_single(struct vm_area_struct *vma, unsigned long address,
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unsigned long size, struct zap_details *details);
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void unmap_vmas(struct mmu_gather *tlb, struct maple_tree *mt,
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struct vm_area_struct *start_vma, unsigned long start,
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unsigned long end);
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@ -3467,12 +3488,4 @@ madvise_set_anon_name(struct mm_struct *mm, unsigned long start,
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}
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#endif
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/*
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* Whether to drop the pte markers, for example, the uffd-wp information for
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* file-backed memory. This should only be specified when we will completely
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* drop the page in the mm, either by truncation or unmapping of the vma. By
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* default, the flag is not set.
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*/
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#define ZAP_FLAG_DROP_MARKER ((__force zap_flags_t) BIT(0))
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#endif /* _LINUX_MM_H */
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@ -165,6 +165,13 @@ static inline pte_t *virt_to_kpte(unsigned long vaddr)
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return pmd_none(*pmd) ? NULL : pte_offset_kernel(pmd, vaddr);
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}
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#ifndef pmd_young
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static inline int pmd_young(pmd_t pmd)
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{
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return 0;
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}
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#endif
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#ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
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extern int ptep_set_access_flags(struct vm_area_struct *vma,
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unsigned long address, pte_t *ptep,
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@ -260,6 +267,17 @@ static inline int pmdp_clear_flush_young(struct vm_area_struct *vma,
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#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
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#endif
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#ifndef arch_has_hw_nonleaf_pmd_young
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/*
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* Return whether the accessed bit in non-leaf PMD entries is supported on the
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* local CPU.
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*/
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static inline bool arch_has_hw_nonleaf_pmd_young(void)
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{
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return IS_ENABLED(CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG);
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}
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#endif
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#ifndef arch_has_hw_pte_young
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/*
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* Return whether the accessed bit is supported on the local CPU.
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@ -399,6 +399,7 @@ config FRAME_WARN
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default 2048 if GCC_PLUGIN_LATENT_ENTROPY
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default 2048 if PARISC
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default 1536 if (!64BIT && XTENSA)
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default 1280 if KASAN && !64BIT
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default 1024 if !64BIT
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default 2048 if 64BIT
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help
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@ -984,22 +984,6 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
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goto isolate_fail;
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}
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/*
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* Migration will fail if an anonymous page is pinned in memory,
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* so avoid taking lru_lock and isolating it unnecessarily in an
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* admittedly racy check.
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*/
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mapping = page_mapping(page);
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if (!mapping && page_count(page) > page_mapcount(page))
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goto isolate_fail;
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/*
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* Only allow to migrate anonymous pages in GFP_NOFS context
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* because those do not depend on fs locks.
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*/
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if (!(cc->gfp_mask & __GFP_FS) && mapping)
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goto isolate_fail;
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|
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/*
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* Be careful not to clear PageLRU until after we're
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* sure the page is not being freed elsewhere -- the
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@ -1008,6 +992,22 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
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if (unlikely(!get_page_unless_zero(page)))
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goto isolate_fail;
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|
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/*
|
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* Migration will fail if an anonymous page is pinned in memory,
|
||||
* so avoid taking lru_lock and isolating it unnecessarily in an
|
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* admittedly racy check.
|
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*/
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mapping = page_mapping(page);
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if (!mapping && (page_count(page) - 1) > total_mapcount(page))
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goto isolate_fail_put;
|
||||
|
||||
/*
|
||||
* Only allow to migrate anonymous pages in GFP_NOFS context
|
||||
* because those do not depend on fs locks.
|
||||
*/
|
||||
if (!(cc->gfp_mask & __GFP_FS) && mapping)
|
||||
goto isolate_fail_put;
|
||||
|
||||
/* Only take pages on LRU: a check now makes later tests safe */
|
||||
if (!PageLRU(page))
|
||||
goto isolate_fail_put;
|
||||
|
||||
@ -2283,12 +2283,54 @@ static struct damos *damon_sysfs_mk_scheme(
|
||||
&wmarks);
|
||||
}
|
||||
|
||||
static void damon_sysfs_update_scheme(struct damos *scheme,
|
||||
struct damon_sysfs_scheme *sysfs_scheme)
|
||||
{
|
||||
struct damon_sysfs_access_pattern *access_pattern =
|
||||
sysfs_scheme->access_pattern;
|
||||
struct damon_sysfs_quotas *sysfs_quotas = sysfs_scheme->quotas;
|
||||
struct damon_sysfs_weights *sysfs_weights = sysfs_quotas->weights;
|
||||
struct damon_sysfs_watermarks *sysfs_wmarks = sysfs_scheme->watermarks;
|
||||
|
||||
scheme->pattern.min_sz_region = access_pattern->sz->min;
|
||||
scheme->pattern.max_sz_region = access_pattern->sz->max;
|
||||
scheme->pattern.min_nr_accesses = access_pattern->nr_accesses->min;
|
||||
scheme->pattern.max_nr_accesses = access_pattern->nr_accesses->max;
|
||||
scheme->pattern.min_age_region = access_pattern->age->min;
|
||||
scheme->pattern.max_age_region = access_pattern->age->max;
|
||||
|
||||
scheme->action = sysfs_scheme->action;
|
||||
|
||||
scheme->quota.ms = sysfs_quotas->ms;
|
||||
scheme->quota.sz = sysfs_quotas->sz;
|
||||
scheme->quota.reset_interval = sysfs_quotas->reset_interval_ms;
|
||||
scheme->quota.weight_sz = sysfs_weights->sz;
|
||||
scheme->quota.weight_nr_accesses = sysfs_weights->nr_accesses;
|
||||
scheme->quota.weight_age = sysfs_weights->age;
|
||||
|
||||
scheme->wmarks.metric = sysfs_wmarks->metric;
|
||||
scheme->wmarks.interval = sysfs_wmarks->interval_us;
|
||||
scheme->wmarks.high = sysfs_wmarks->high;
|
||||
scheme->wmarks.mid = sysfs_wmarks->mid;
|
||||
scheme->wmarks.low = sysfs_wmarks->low;
|
||||
}
|
||||
|
||||
static int damon_sysfs_set_schemes(struct damon_ctx *ctx,
|
||||
struct damon_sysfs_schemes *sysfs_schemes)
|
||||
{
|
||||
int i;
|
||||
struct damos *scheme, *next;
|
||||
int i = 0;
|
||||
|
||||
for (i = 0; i < sysfs_schemes->nr; i++) {
|
||||
damon_for_each_scheme_safe(scheme, next, ctx) {
|
||||
if (i < sysfs_schemes->nr)
|
||||
damon_sysfs_update_scheme(scheme,
|
||||
sysfs_schemes->schemes_arr[i]);
|
||||
else
|
||||
damon_destroy_scheme(scheme);
|
||||
i++;
|
||||
}
|
||||
|
||||
for (; i < sysfs_schemes->nr; i++) {
|
||||
struct damos *scheme, *next;
|
||||
|
||||
scheme = damon_sysfs_mk_scheme(sysfs_schemes->schemes_arr[i]);
|
||||
|
||||
19
mm/hugetlb.c
19
mm/hugetlb.c
@ -5206,17 +5206,22 @@ void __unmap_hugepage_range_final(struct mmu_gather *tlb,
|
||||
|
||||
__unmap_hugepage_range(tlb, vma, start, end, ref_page, zap_flags);
|
||||
|
||||
if (zap_flags & ZAP_FLAG_UNMAP) { /* final unmap */
|
||||
/*
|
||||
* Unlock and free the vma lock before releasing i_mmap_rwsem. When
|
||||
* the vma_lock is freed, this makes the vma ineligible for pmd
|
||||
* sharing. And, i_mmap_rwsem is required to set up pmd sharing.
|
||||
* This is important as page tables for this unmapped range will
|
||||
* be asynchrously deleted. If the page tables are shared, there
|
||||
* will be issues when accessed by someone else.
|
||||
* Unlock and free the vma lock before releasing i_mmap_rwsem.
|
||||
* When the vma_lock is freed, this makes the vma ineligible
|
||||
* for pmd sharing. And, i_mmap_rwsem is required to set up
|
||||
* pmd sharing. This is important as page tables for this
|
||||
* unmapped range will be asynchrously deleted. If the page
|
||||
* tables are shared, there will be issues when accessed by
|
||||
* someone else.
|
||||
*/
|
||||
__hugetlb_vma_unlock_write_free(vma);
|
||||
|
||||
i_mmap_unlock_write(vma->vm_file->f_mapping);
|
||||
} else {
|
||||
i_mmap_unlock_write(vma->vm_file->f_mapping);
|
||||
hugetlb_vma_unlock_write(vma);
|
||||
}
|
||||
}
|
||||
|
||||
void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
|
||||
|
||||
@ -1051,6 +1051,7 @@ static int collapse_huge_page(struct mm_struct *mm, unsigned long address,
|
||||
_pmd = pmdp_collapse_flush(vma, address, pmd);
|
||||
spin_unlock(pmd_ptl);
|
||||
mmu_notifier_invalidate_range_end(&range);
|
||||
tlb_remove_table_sync_one();
|
||||
|
||||
spin_lock(pte_ptl);
|
||||
result = __collapse_huge_page_isolate(vma, address, pte, cc,
|
||||
@ -1379,16 +1380,43 @@ static int set_huge_pmd(struct vm_area_struct *vma, unsigned long addr,
|
||||
return SCAN_SUCCEED;
|
||||
}
|
||||
|
||||
/*
|
||||
* A note about locking:
|
||||
* Trying to take the page table spinlocks would be useless here because those
|
||||
* are only used to synchronize:
|
||||
*
|
||||
* - modifying terminal entries (ones that point to a data page, not to another
|
||||
* page table)
|
||||
* - installing *new* non-terminal entries
|
||||
*
|
||||
* Instead, we need roughly the same kind of protection as free_pgtables() or
|
||||
* mm_take_all_locks() (but only for a single VMA):
|
||||
* The mmap lock together with this VMA's rmap locks covers all paths towards
|
||||
* the page table entries we're messing with here, except for hardware page
|
||||
* table walks and lockless_pages_from_mm().
|
||||
*/
|
||||
static void collapse_and_free_pmd(struct mm_struct *mm, struct vm_area_struct *vma,
|
||||
unsigned long addr, pmd_t *pmdp)
|
||||
{
|
||||
spinlock_t *ptl;
|
||||
pmd_t pmd;
|
||||
struct mmu_notifier_range range;
|
||||
|
||||
mmap_assert_write_locked(mm);
|
||||
ptl = pmd_lock(vma->vm_mm, pmdp);
|
||||
if (vma->vm_file)
|
||||
lockdep_assert_held_write(&vma->vm_file->f_mapping->i_mmap_rwsem);
|
||||
/*
|
||||
* All anon_vmas attached to the VMA have the same root and are
|
||||
* therefore locked by the same lock.
|
||||
*/
|
||||
if (vma->anon_vma)
|
||||
lockdep_assert_held_write(&vma->anon_vma->root->rwsem);
|
||||
|
||||
mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, NULL, mm, addr,
|
||||
addr + HPAGE_PMD_SIZE);
|
||||
mmu_notifier_invalidate_range_start(&range);
|
||||
pmd = pmdp_collapse_flush(vma, addr, pmdp);
|
||||
spin_unlock(ptl);
|
||||
tlb_remove_table_sync_one();
|
||||
mmu_notifier_invalidate_range_end(&range);
|
||||
mm_dec_nr_ptes(mm);
|
||||
page_table_check_pte_clear_range(mm, addr, pmd);
|
||||
pte_free(mm, pmd_pgtable(pmd));
|
||||
@ -1439,6 +1467,14 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
|
||||
if (!hugepage_vma_check(vma, vma->vm_flags, false, false, false))
|
||||
return SCAN_VMA_CHECK;
|
||||
|
||||
/*
|
||||
* Symmetry with retract_page_tables(): Exclude MAP_PRIVATE mappings
|
||||
* that got written to. Without this, we'd have to also lock the
|
||||
* anon_vma if one exists.
|
||||
*/
|
||||
if (vma->anon_vma)
|
||||
return SCAN_VMA_CHECK;
|
||||
|
||||
/* Keep pmd pgtable for uffd-wp; see comment in retract_page_tables() */
|
||||
if (userfaultfd_wp(vma))
|
||||
return SCAN_PTE_UFFD_WP;
|
||||
@ -1472,6 +1508,20 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
|
||||
goto drop_hpage;
|
||||
}
|
||||
|
||||
/*
|
||||
* We need to lock the mapping so that from here on, only GUP-fast and
|
||||
* hardware page walks can access the parts of the page tables that
|
||||
* we're operating on.
|
||||
* See collapse_and_free_pmd().
|
||||
*/
|
||||
i_mmap_lock_write(vma->vm_file->f_mapping);
|
||||
|
||||
/*
|
||||
* This spinlock should be unnecessary: Nobody else should be accessing
|
||||
* the page tables under spinlock protection here, only
|
||||
* lockless_pages_from_mm() and the hardware page walker can access page
|
||||
* tables while all the high-level locks are held in write mode.
|
||||
*/
|
||||
start_pte = pte_offset_map_lock(mm, pmd, haddr, &ptl);
|
||||
result = SCAN_FAIL;
|
||||
|
||||
@ -1526,6 +1576,8 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
|
||||
/* step 4: remove pte entries */
|
||||
collapse_and_free_pmd(mm, vma, haddr, pmd);
|
||||
|
||||
i_mmap_unlock_write(vma->vm_file->f_mapping);
|
||||
|
||||
maybe_install_pmd:
|
||||
/* step 5: install pmd entry */
|
||||
result = install_pmd
|
||||
@ -1539,6 +1591,7 @@ drop_hpage:
|
||||
|
||||
abort:
|
||||
pte_unmap_unlock(start_pte, ptl);
|
||||
i_mmap_unlock_write(vma->vm_file->f_mapping);
|
||||
goto drop_hpage;
|
||||
}
|
||||
|
||||
@ -1595,7 +1648,8 @@ static int retract_page_tables(struct address_space *mapping, pgoff_t pgoff,
|
||||
* An alternative would be drop the check, but check that page
|
||||
* table is clear before calling pmdp_collapse_flush() under
|
||||
* ptl. It has higher chance to recover THP for the VMA, but
|
||||
* has higher cost too.
|
||||
* has higher cost too. It would also probably require locking
|
||||
* the anon_vma.
|
||||
*/
|
||||
if (vma->anon_vma) {
|
||||
result = SCAN_PAGE_ANON;
|
||||
|
||||
@ -772,8 +772,8 @@ static int madvise_free_single_vma(struct vm_area_struct *vma,
|
||||
* Application no longer needs these pages. If the pages are dirty,
|
||||
* it's OK to just throw them away. The app will be more careful about
|
||||
* data it wants to keep. Be sure to free swap resources too. The
|
||||
* zap_page_range call sets things up for shrink_active_list to actually free
|
||||
* these pages later if no one else has touched them in the meantime,
|
||||
* zap_page_range_single call sets things up for shrink_active_list to actually
|
||||
* free these pages later if no one else has touched them in the meantime,
|
||||
* although we could add these pages to a global reuse list for
|
||||
* shrink_active_list to pick up before reclaiming other pages.
|
||||
*
|
||||
@ -790,7 +790,7 @@ static int madvise_free_single_vma(struct vm_area_struct *vma,
|
||||
static long madvise_dontneed_single_vma(struct vm_area_struct *vma,
|
||||
unsigned long start, unsigned long end)
|
||||
{
|
||||
zap_page_range(vma, start, end - start);
|
||||
zap_page_range_single(vma, start, end - start, NULL);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
25
mm/memory.c
25
mm/memory.c
@ -1341,15 +1341,6 @@ copy_page_range(struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma)
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Parameter block passed down to zap_pte_range in exceptional cases.
|
||||
*/
|
||||
struct zap_details {
|
||||
struct folio *single_folio; /* Locked folio to be unmapped */
|
||||
bool even_cows; /* Zap COWed private pages too? */
|
||||
zap_flags_t zap_flags; /* Extra flags for zapping */
|
||||
};
|
||||
|
||||
/* Whether we should zap all COWed (private) pages too */
|
||||
static inline bool should_zap_cows(struct zap_details *details)
|
||||
{
|
||||
@ -1720,7 +1711,7 @@ void unmap_vmas(struct mmu_gather *tlb, struct maple_tree *mt,
|
||||
{
|
||||
struct mmu_notifier_range range;
|
||||
struct zap_details details = {
|
||||
.zap_flags = ZAP_FLAG_DROP_MARKER,
|
||||
.zap_flags = ZAP_FLAG_DROP_MARKER | ZAP_FLAG_UNMAP,
|
||||
/* Careful - we need to zap private pages too! */
|
||||
.even_cows = true,
|
||||
};
|
||||
@ -1774,19 +1765,27 @@ void zap_page_range(struct vm_area_struct *vma, unsigned long start,
|
||||
*
|
||||
* The range must fit into one VMA.
|
||||
*/
|
||||
static void zap_page_range_single(struct vm_area_struct *vma, unsigned long address,
|
||||
void zap_page_range_single(struct vm_area_struct *vma, unsigned long address,
|
||||
unsigned long size, struct zap_details *details)
|
||||
{
|
||||
const unsigned long end = address + size;
|
||||
struct mmu_notifier_range range;
|
||||
struct mmu_gather tlb;
|
||||
|
||||
lru_add_drain();
|
||||
mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, vma, vma->vm_mm,
|
||||
address, address + size);
|
||||
address, end);
|
||||
if (is_vm_hugetlb_page(vma))
|
||||
adjust_range_if_pmd_sharing_possible(vma, &range.start,
|
||||
&range.end);
|
||||
tlb_gather_mmu(&tlb, vma->vm_mm);
|
||||
update_hiwater_rss(vma->vm_mm);
|
||||
mmu_notifier_invalidate_range_start(&range);
|
||||
unmap_single_vma(&tlb, vma, address, range.end, details);
|
||||
/*
|
||||
* unmap 'address-end' not 'range.start-range.end' as range
|
||||
* could have been expanded for hugetlb pmd sharing.
|
||||
*/
|
||||
unmap_single_vma(&tlb, vma, address, end, details);
|
||||
mmu_notifier_invalidate_range_end(&range);
|
||||
tlb_finish_mmu(&tlb);
|
||||
}
|
||||
|
||||
@ -153,7 +153,7 @@ static void tlb_remove_table_smp_sync(void *arg)
|
||||
/* Simply deliver the interrupt */
|
||||
}
|
||||
|
||||
static void tlb_remove_table_sync_one(void)
|
||||
void tlb_remove_table_sync_one(void)
|
||||
{
|
||||
/*
|
||||
* This isn't an RCU grace period and hence the page-tables cannot be
|
||||
@ -177,8 +177,6 @@ static void tlb_remove_table_free(struct mmu_table_batch *batch)
|
||||
|
||||
#else /* !CONFIG_MMU_GATHER_RCU_TABLE_FREE */
|
||||
|
||||
static void tlb_remove_table_sync_one(void) { }
|
||||
|
||||
static void tlb_remove_table_free(struct mmu_table_batch *batch)
|
||||
{
|
||||
__tlb_remove_table_free(batch);
|
||||
|
||||
10
mm/vmscan.c
10
mm/vmscan.c
@ -3987,7 +3987,7 @@ static void walk_pmd_range_locked(pud_t *pud, unsigned long next, struct vm_area
|
||||
goto next;
|
||||
|
||||
if (!pmd_trans_huge(pmd[i])) {
|
||||
if (IS_ENABLED(CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG) &&
|
||||
if (arch_has_hw_nonleaf_pmd_young() &&
|
||||
get_cap(LRU_GEN_NONLEAF_YOUNG))
|
||||
pmdp_test_and_clear_young(vma, addr, pmd + i);
|
||||
goto next;
|
||||
@ -4085,14 +4085,14 @@ restart:
|
||||
#endif
|
||||
walk->mm_stats[MM_NONLEAF_TOTAL]++;
|
||||
|
||||
#ifdef CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG
|
||||
if (get_cap(LRU_GEN_NONLEAF_YOUNG)) {
|
||||
if (arch_has_hw_nonleaf_pmd_young() &&
|
||||
get_cap(LRU_GEN_NONLEAF_YOUNG)) {
|
||||
if (!pmd_young(val))
|
||||
continue;
|
||||
|
||||
walk_pmd_range_locked(pud, addr, vma, args, bitmap, &pos);
|
||||
}
|
||||
#endif
|
||||
|
||||
if (!walk->force_scan && !test_bloom_filter(walk->lruvec, walk->max_seq, pmd + i))
|
||||
continue;
|
||||
|
||||
@ -5392,7 +5392,7 @@ static ssize_t show_enabled(struct kobject *kobj, struct kobj_attribute *attr, c
|
||||
if (arch_has_hw_pte_young() && get_cap(LRU_GEN_MM_WALK))
|
||||
caps |= BIT(LRU_GEN_MM_WALK);
|
||||
|
||||
if (IS_ENABLED(CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG) && get_cap(LRU_GEN_NONLEAF_YOUNG))
|
||||
if (arch_has_hw_nonleaf_pmd_young() && get_cap(LRU_GEN_NONLEAF_YOUNG))
|
||||
caps |= BIT(LRU_GEN_NONLEAF_YOUNG);
|
||||
|
||||
return snprintf(buf, PAGE_SIZE, "0x%04x\n", caps);
|
||||
|
||||
@ -150,7 +150,7 @@ do_preprocess()
|
||||
let lines=3
|
||||
out=`basename "$in"`"-slabs-by-loss"
|
||||
`cat "$in" | grep -A "$lines" 'Slabs sorted by loss' |\
|
||||
egrep -iv '\-\-|Name|Slabs'\
|
||||
grep -E -iv '\-\-|Name|Slabs'\
|
||||
| awk '{print $1" "$4+$2*$3" "$4}' > "$out"`
|
||||
if [ $? -eq 0 ]; then
|
||||
do_slabs_plotting "$out"
|
||||
@ -159,7 +159,7 @@ do_preprocess()
|
||||
let lines=3
|
||||
out=`basename "$in"`"-slabs-by-size"
|
||||
`cat "$in" | grep -A "$lines" 'Slabs sorted by size' |\
|
||||
egrep -iv '\-\-|Name|Slabs'\
|
||||
grep -E -iv '\-\-|Name|Slabs'\
|
||||
| awk '{print $1" "$4" "$4-$2*$3}' > "$out"`
|
||||
if [ $? -eq 0 ]; then
|
||||
do_slabs_plotting "$out"
|
||||
|
||||
Loading…
Reference in New Issue
Block a user