Date: Mon, 31 Aug 2020 14:23:42 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r364987 - stable/12/sys/vm Message-ID: <202008311423.07VENgqr072378@repo.freebsd.org>
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Author: markj Date: Mon Aug 31 14:23:41 2020 New Revision: 364987 URL: https://svnweb.freebsd.org/changeset/base/364987 Log: MFC r364302, r364306: Remove the VM map zone. Modified: stable/12/sys/vm/vm_extern.h stable/12/sys/vm/vm_init.c stable/12/sys/vm/vm_kern.c stable/12/sys/vm/vm_kern.h stable/12/sys/vm/vm_map.c stable/12/sys/vm/vm_map.h Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/vm/vm_extern.h ============================================================================== --- stable/12/sys/vm/vm_extern.h Mon Aug 31 13:53:14 2020 (r364986) +++ stable/12/sys/vm/vm_extern.h Mon Aug 31 14:23:41 2020 (r364987) @@ -77,8 +77,8 @@ void kmem_unback(vm_object_t, vm_offset_t, vm_size_t); /* Bootstrapping. */ void kmem_bootstrap_free(vm_offset_t, vm_size_t); -vm_map_t kmem_suballoc(vm_map_t, vm_offset_t *, vm_offset_t *, vm_size_t, - boolean_t); +void kmem_subinit(vm_map_t, vm_map_t, vm_offset_t *, vm_offset_t *, vm_size_t, + bool); void kmem_init(vm_offset_t, vm_offset_t); void kmem_init_zero_region(void); void kmeminit(void); Modified: stable/12/sys/vm/vm_init.c ============================================================================== --- stable/12/sys/vm/vm_init.c Mon Aug 31 13:53:14 2020 (r364986) +++ stable/12/sys/vm/vm_init.c Mon Aug 31 14:23:41 2020 (r364987) @@ -273,8 +273,8 @@ again: exec_map_entries = 2 * mp_ncpus + 4; #endif exec_map_entry_size = round_page(PATH_MAX + ARG_MAX); - exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, - exec_map_entries * exec_map_entry_size + 64 * PAGE_SIZE, FALSE); - pipe_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, maxpipekva, - FALSE); + kmem_subinit(exec_map, kernel_map, &minaddr, &maxaddr, + exec_map_entries * exec_map_entry_size + 64 * PAGE_SIZE, false); + kmem_subinit(pipe_map, kernel_map, &minaddr, &maxaddr, maxpipekva, + false); } Modified: stable/12/sys/vm/vm_kern.c ============================================================================== --- stable/12/sys/vm/vm_kern.c Mon Aug 31 13:53:14 2020 (r364986) +++ stable/12/sys/vm/vm_kern.c Mon Aug 31 14:23:41 2020 (r364987) @@ -97,9 +97,9 @@ __FBSDID("$FreeBSD$"); #include <vm/vm_extern.h> #include <vm/uma.h> -vm_map_t kernel_map; -vm_map_t exec_map; -vm_map_t pipe_map; +struct vm_map kernel_map_store; +struct vm_map exec_map_store; +struct vm_map pipe_map_store; const void *zero_region; CTASSERT((ZERO_REGION_SIZE & PAGE_MASK) == 0); @@ -357,9 +357,9 @@ kmem_alloc_contig_domainset(struct domainset *ds, vm_s } /* - * kmem_suballoc: + * kmem_subinit: * - * Allocates a map to manage a subrange + * Initializes a map to manage a subrange * of the kernel virtual address space. * * Arguments are as follows: @@ -369,12 +369,11 @@ kmem_alloc_contig_domainset(struct domainset *ds, vm_s * size Size of range to find * superpage_align Request that min is superpage aligned */ -vm_map_t -kmem_suballoc(vm_map_t parent, vm_offset_t *min, vm_offset_t *max, - vm_size_t size, boolean_t superpage_align) +void +kmem_subinit(vm_map_t map, vm_map_t parent, vm_offset_t *min, vm_offset_t *max, + vm_size_t size, bool superpage_align) { int ret; - vm_map_t result; size = round_page(size); @@ -383,14 +382,11 @@ kmem_suballoc(vm_map_t parent, vm_offset_t *min, vm_of VMFS_SUPER_SPACE : VMFS_ANY_SPACE, VM_PROT_ALL, VM_PROT_ALL, MAP_ACC_NO_CHARGE); if (ret != KERN_SUCCESS) - panic("kmem_suballoc: bad status return of %d", ret); + panic("kmem_subinit: bad status return of %d", ret); *max = *min + size; - result = vm_map_create(vm_map_pmap(parent), *min, *max); - if (result == NULL) - panic("kmem_suballoc: cannot create submap"); - if (vm_map_submap(parent, *min, *max, result) != KERN_SUCCESS) - panic("kmem_suballoc: unable to change range to submap"); - return (result); + vm_map_init(map, vm_map_pmap(parent), *min, *max); + if (vm_map_submap(parent, *min, *max, map) != KERN_SUCCESS) + panic("kmem_subinit: unable to change range to submap"); } /* @@ -746,15 +742,13 @@ kva_import_domain(void *arena, vmem_size_t size, int f void kmem_init(vm_offset_t start, vm_offset_t end) { - vm_map_t m; int domain; - m = vm_map_create(kernel_pmap, VM_MIN_KERNEL_ADDRESS, end); - m->system_map = 1; - vm_map_lock(m); + vm_map_init(kernel_map, kernel_pmap, VM_MIN_KERNEL_ADDRESS, end); + kernel_map->system_map = 1; + vm_map_lock(kernel_map); /* N.B.: cannot use kgdb to debug, starting with this assignment ... */ - kernel_map = m; - (void) vm_map_insert(m, NULL, (vm_ooffset_t) 0, + (void) vm_map_insert(kernel_map, NULL, (vm_ooffset_t) 0, #ifdef __amd64__ KERNBASE, #else @@ -762,7 +756,7 @@ kmem_init(vm_offset_t start, vm_offset_t end) #endif start, VM_PROT_ALL, VM_PROT_ALL, MAP_NOFAULT); /* ... and ending with the completion of the above `insert' */ - vm_map_unlock(m); + vm_map_unlock(kernel_map); /* * Initialize the kernel_arena. This can grow on demand. Modified: stable/12/sys/vm/vm_kern.h ============================================================================== --- stable/12/sys/vm/vm_kern.h Mon Aug 31 13:53:14 2020 (r364986) +++ stable/12/sys/vm/vm_kern.h Mon Aug 31 14:23:41 2020 (r364987) @@ -66,9 +66,12 @@ #define _VM_VM_KERN_H_ /* Kernel memory management definitions. */ -extern vm_map_t kernel_map; -extern vm_map_t exec_map; -extern vm_map_t pipe_map; +extern struct vm_map kernel_map_store; +#define kernel_map (&kernel_map_store) +extern struct vm_map exec_map_store; +#define exec_map (&exec_map_store) +extern struct vm_map pipe_map_store; +#define pipe_map (&pipe_map_store) extern struct vmem *kernel_arena; extern struct vmem *kmem_arena; extern struct vmem *buffer_arena; Modified: stable/12/sys/vm/vm_map.c ============================================================================== --- stable/12/sys/vm/vm_map.c Mon Aug 31 13:53:14 2020 (r364986) +++ stable/12/sys/vm/vm_map.c Mon Aug 31 14:23:41 2020 (r364987) @@ -128,10 +128,8 @@ __FBSDID("$FreeBSD$"); static struct mtx map_sleep_mtx; static uma_zone_t mapentzone; static uma_zone_t kmapentzone; -static uma_zone_t mapzone; static uma_zone_t vmspace_zone; static int vmspace_zinit(void *mem, int size, int flags); -static int vm_map_zinit(void *mem, int ize, int flags); static void _vm_map_init(vm_map_t map, pmap_t pmap, vm_offset_t min, vm_offset_t max); static void vm_map_entry_deallocate(vm_map_entry_t entry, boolean_t system_map); @@ -142,7 +140,6 @@ static int vm_map_growstack(vm_map_t map, vm_offset_t static void vm_map_pmap_enter(vm_map_t map, vm_offset_t addr, vm_prot_t prot, vm_object_t object, vm_pindex_t pindex, vm_size_t size, int flags); #ifdef INVARIANTS -static void vm_map_zdtor(void *mem, int size, void *arg); static void vmspace_zdtor(void *mem, int size, void *arg); #endif static int vm_map_stack_locked(vm_map_t map, vm_offset_t addrbos, @@ -198,14 +195,6 @@ void vm_map_startup(void) { mtx_init(&map_sleep_mtx, "vm map sleep mutex", NULL, MTX_DEF); - mapzone = uma_zcreate("MAP", sizeof(struct vm_map), NULL, -#ifdef INVARIANTS - vm_map_zdtor, -#else - NULL, -#endif - vm_map_zinit, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); - uma_prealloc(mapzone, MAX_KMAP); kmapentzone = uma_zcreate("KMAP ENTRY", sizeof(struct vm_map_entry), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_MTXCLASS | UMA_ZONE_VM); @@ -224,24 +213,16 @@ static int vmspace_zinit(void *mem, int size, int flags) { struct vmspace *vm; + vm_map_t map; vm = (struct vmspace *)mem; + map = &vm->vm_map; - vm->vm_map.pmap = NULL; - (void)vm_map_zinit(&vm->vm_map, sizeof(vm->vm_map), flags); - PMAP_LOCK_INIT(vmspace_pmap(vm)); - return (0); -} - -static int -vm_map_zinit(void *mem, int size, int flags) -{ - vm_map_t map; - - map = (vm_map_t)mem; memset(map, 0, sizeof(*map)); - mtx_init(&map->system_mtx, "vm map (system)", NULL, MTX_DEF | MTX_DUPOK); + mtx_init(&map->system_mtx, "vm map (system)", NULL, + MTX_DEF | MTX_DUPOK); sx_init(&map->lock, "vm map (user)"); + PMAP_LOCK_INIT(vmspace_pmap(vm)); return (0); } @@ -252,29 +233,16 @@ vmspace_zdtor(void *mem, int size, void *arg) struct vmspace *vm; vm = (struct vmspace *)mem; - - vm_map_zdtor(&vm->vm_map, sizeof(vm->vm_map), arg); + KASSERT(vm->vm_map.nentries == 0, + ("vmspace %p nentries == %d on free", vm, vm->vm_map.nentries)); + KASSERT(vm->vm_map.size == 0, + ("vmspace %p size == %ju on free", vm, (uintmax_t)vm->vm_map.size)); } -static void -vm_map_zdtor(void *mem, int size, void *arg) -{ - vm_map_t map; - - map = (vm_map_t)mem; - KASSERT(map->nentries == 0, - ("map %p nentries == %d on free.", - map, map->nentries)); - KASSERT(map->size == 0, - ("map %p size == %lu on free.", - map, (unsigned long)map->size)); -} #endif /* INVARIANTS */ /* * Allocate a vmspace structure, including a vm_map and pmap, * and initialize those structures. The refcnt is set to 1. - * - * If 'pinit' is NULL then the embedded pmap is initialized via pmap_pinit(). */ struct vmspace * vmspace_alloc(vm_offset_t min, vm_offset_t max, pmap_pinit_t pinit) @@ -878,24 +846,6 @@ vmspace_resident_count(struct vmspace *vmspace) } /* - * vm_map_create: - * - * Creates and returns a new empty VM map with - * the given physical map structure, and having - * the given lower and upper address bounds. - */ -vm_map_t -vm_map_create(pmap_t pmap, vm_offset_t min, vm_offset_t max) -{ - vm_map_t result; - - result = uma_zalloc(mapzone, M_WAITOK); - CTR1(KTR_VM, "vm_map_create: %p", result); - _vm_map_init(result, pmap, min, max); - return (result); -} - -/* * Initialize an existing vm_map structure * such as that in the vmspace structure. */ @@ -922,8 +872,9 @@ vm_map_init(vm_map_t map, pmap_t pmap, vm_offset_t min { _vm_map_init(map, pmap, min, max); - mtx_init(&map->system_mtx, "system map", NULL, MTX_DEF | MTX_DUPOK); - sx_init(&map->lock, "user map"); + mtx_init(&map->system_mtx, "vm map (system)", NULL, + MTX_DEF | MTX_DUPOK); + sx_init(&map->lock, "vm map (user)"); } /* Modified: stable/12/sys/vm/vm_map.h ============================================================================== --- stable/12/sys/vm/vm_map.h Mon Aug 31 13:53:14 2020 (r364986) +++ stable/12/sys/vm/vm_map.h Mon Aug 31 14:23:41 2020 (r364987) @@ -346,10 +346,6 @@ bool vm_map_range_valid_KBI(vm_map_t map, vm_offset_t long vmspace_resident_count(struct vmspace *vmspace); #endif /* _KERNEL */ - -/* XXX: number of kernel maps to statically allocate */ -#define MAX_KMAP 10 - /* * Copy-on-write flags for vm_map operations */ @@ -413,7 +409,6 @@ long vmspace_resident_count(struct vmspace *vmspace); #ifdef _KERNEL boolean_t vm_map_check_protection (vm_map_t, vm_offset_t, vm_offset_t, vm_prot_t); -vm_map_t vm_map_create(pmap_t, vm_offset_t, vm_offset_t); int vm_map_delete(vm_map_t, vm_offset_t, vm_offset_t); int vm_map_find(vm_map_t, vm_object_t, vm_ooffset_t, vm_offset_t *, vm_size_t, vm_offset_t, int, vm_prot_t, vm_prot_t, int);
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