diff options
Diffstat (limited to 'include/linux/mm_types.h')
| -rw-r--r-- | include/linux/mm_types.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 31f8a3af7d94..7ade2731b5d6 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -224,7 +224,8 @@ struct vm_region { * library, the executable area etc). */ struct vm_area_struct { - struct mm_struct * vm_mm; /* The address space we belong to. */ + /* The first cache line has the info for VMA tree walking. */ + unsigned long vm_start; /* Our start address within vm_mm. */ unsigned long vm_end; /* The first byte after our end address within vm_mm. */ @@ -232,11 +233,22 @@ struct vm_area_struct { /* linked list of VM areas per task, sorted by address */ struct vm_area_struct *vm_next, *vm_prev; + struct rb_node vm_rb; + + /* + * Largest free memory gap in bytes to the left of this VMA. + * Either between this VMA and vma->vm_prev, or between one of the + * VMAs below us in the VMA rbtree and its ->vm_prev. This helps + * get_unmapped_area find a free area of the right size. + */ + unsigned long rb_subtree_gap; + + /* Second cache line starts here. */ + + struct mm_struct *vm_mm; /* The address space we belong to. */ pgprot_t vm_page_prot; /* Access permissions of this VMA. */ unsigned long vm_flags; /* Flags, see mm.h. */ - struct rb_node vm_rb; - /* * For areas with an address space and backing store, * linkage into the address_space->i_mmap interval tree, or @@ -322,6 +334,7 @@ struct mm_struct { unsigned long task_size; /* size of task vm space */ unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */ unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */ + unsigned long highest_vm_end; /* highest vma end address */ pgd_t * pgd; atomic_t mm_users; /* How many users with user space? */ atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */ |