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sys/vm/swap_pager.c
| Show First 20 Lines • Show All 2,270 Lines • ▼ Show 20 Lines | swp_pager_meta_lookup(vm_object_t object, vm_pindex_t pindex) | ||||||||
| if (sb == NULL) | if (sb == NULL) | ||||||||
| return (SWAPBLK_NONE); | return (SWAPBLK_NONE); | ||||||||
| return (sb->d[pindex % SWAP_META_PAGES]); | return (sb->d[pindex % SWAP_META_PAGES]); | ||||||||
| } | } | ||||||||
| /* | /* | ||||||||
| * Returns the least page index which is greater than or equal to the | * Returns the least page index which is greater than or equal to the | ||||||||
| * parameter pindex and for which there is a swap block allocated. | * parameter pindex and for which there is a swap block allocated. | ||||||||
| * Returns object's size if the object's type is not swap or if there | * Returns object's size if the object's type is not swap or if there | ||||||||
kibUnsubmitted Not Done Inline Actions
kib: | |||||||||
| * are no allocated swap blocks for the object after the requested | * are no allocated swap blocks for the object after the requested | ||||||||
| * pindex. | * pindex. | ||||||||
| */ | */ | ||||||||
| vm_pindex_t | vm_pindex_t | ||||||||
| swap_pager_find_least(vm_object_t object, vm_pindex_t pindex) | swap_pager_find_least(vm_object_t object, vm_pindex_t pindex) | ||||||||
| { | { | ||||||||
| struct swblk *sb; | struct swblk *sb; | ||||||||
| int i; | int i; | ||||||||
| VM_OBJECT_ASSERT_LOCKED(object); | VM_OBJECT_ASSERT_LOCKED(object); | ||||||||
| MPASS((object->flags & OBJ_SWAP) != 0); | MPASS((object->flags & OBJ_SWAP) != 0); | ||||||||
| if (pctrie_is_empty(&object->un_pager.swp.swp_blks)) | |||||||||
| return (object->size); | |||||||||
| sb = SWAP_PCTRIE_LOOKUP_GE(&object->un_pager.swp.swp_blks, | sb = SWAP_PCTRIE_LOOKUP_GE(&object->un_pager.swp.swp_blks, | ||||||||
| rounddown(pindex, SWAP_META_PAGES)); | rounddown(pindex, SWAP_META_PAGES)); | ||||||||
| if (sb == NULL) | if (sb == NULL) | ||||||||
| return (object->size); | return (object->size); | ||||||||
| if (sb->p < pindex) { | for (i = pindex - sb->p; i < SWAP_META_PAGES; i++) { | ||||||||
| for (i = pindex % SWAP_META_PAGES; i < SWAP_META_PAGES; i++) { | |||||||||
| if (sb->d[i] != SWAPBLK_NONE) | if (sb->d[i] != SWAPBLK_NONE) | ||||||||
| return (sb->p + i); | return (sb->p + i); | ||||||||
| } | } | ||||||||
| sb = SWAP_PCTRIE_LOOKUP_GE(&object->un_pager.swp.swp_blks, | sb = SWAP_PCTRIE_LOOKUP_GE(&object->un_pager.swp.swp_blks, pindex); | ||||||||
| roundup(pindex, SWAP_META_PAGES)); | |||||||||
| if (sb == NULL) | if (sb == NULL) | ||||||||
| return (object->size); | return (object->size); | ||||||||
| } | |||||||||
| for (i = 0; i < SWAP_META_PAGES; i++) { | for (i = 0; i < SWAP_META_PAGES; i++) { | ||||||||
| if (sb->d[i] != SWAPBLK_NONE) | if (sb->d[i] != SWAPBLK_NONE) | ||||||||
| return (sb->p + i); | return (sb->p + i); | ||||||||
| } | } | ||||||||
| /* | /* | ||||||||
| * We get here if a swblk is present in the trie but it | * We get here if a swblk is present in the trie but it | ||||||||
| * doesn't map any blocks. | * doesn't map any blocks. | ||||||||
| */ | */ | ||||||||
| MPASS(0); | __unreachable(); | ||||||||
Not Done Inline ActionsPerhaps it is the time to change these two lines into __unreachable(). kib: Perhaps it is the time to change these two lines into __unreachable(). | |||||||||
| return (object->size); | return (object->size); | ||||||||
| } | } | ||||||||
| /* | /* | ||||||||
| * System call swapon(name) enables swapping on device name, | * System call swapon(name) enables swapping on device name, | ||||||||
| * which must be in the swdevsw. Return EBUSY | * which must be in the swdevsw. Return EBUSY | ||||||||
| * if already swapping on this device. | * if already swapping on this device. | ||||||||
| */ | */ | ||||||||
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