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| author | Hugh Dickins <hugh@veritas.com> | 2005-10-29 18:16:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-29 21:40:41 -0700 |
| commit | 508034a32b819a2d40aa7ac0dbc8cd2e044c2de6 (patch) | |
| tree | 906a8f0095af24f403b30d649d3ec1ffb4ff2f50 /include/linux | |
| parent | 8f4f8c164cb4af1432cc25eda82928ea4519ba72 (diff) | |
| download | op-kernel-dev-508034a32b819a2d40aa7ac0dbc8cd2e044c2de6.zip op-kernel-dev-508034a32b819a2d40aa7ac0dbc8cd2e044c2de6.tar.gz | |
[PATCH] mm: unmap_vmas with inner ptlock
Remove the page_table_lock from around the calls to unmap_vmas, and replace
the pte_offset_map in zap_pte_range by pte_offset_map_lock: all callers are
now safe to descend without page_table_lock.
Don't attempt fancy locking for hugepages, just take page_table_lock in
unmap_hugepage_range. Which makes zap_hugepage_range, and the hugetlb test in
zap_page_range, redundant: unmap_vmas calls unmap_hugepage_range anyway. Nor
does unmap_vmas have much use for its mm arg now.
The tlb_start_vma and tlb_end_vma in unmap_page_range are now called without
page_table_lock: if they're implemented at all, they typically come down to
flush_cache_range (usually done outside page_table_lock) and flush_tlb_range
(which we already audited for the mprotect case).
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/hugetlb.h | 2 | ||||
| -rw-r--r-- | include/linux/mm.h | 2 |
2 files changed, 1 insertions, 3 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index d664330..0cea162 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -16,7 +16,6 @@ static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int); -void zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); int hugetlb_prefault(struct address_space *, struct vm_area_struct *); int hugetlb_report_meminfo(char *); @@ -87,7 +86,6 @@ static inline unsigned long hugetlb_total_pages(void) #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) -#define zap_hugepage_range(vma, start, len) BUG() #define unmap_hugepage_range(vma, start, end) BUG() #define is_hugepage_mem_enough(size) 0 #define hugetlb_report_meminfo(buf) 0 diff --git a/include/linux/mm.h b/include/linux/mm.h index d4c3512..972e2ce8 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -682,7 +682,7 @@ struct zap_details { unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address, unsigned long size, struct zap_details *); -unsigned long unmap_vmas(struct mmu_gather **tlb, struct mm_struct *mm, +unsigned long unmap_vmas(struct mmu_gather **tlb, struct vm_area_struct *start_vma, unsigned long start_addr, unsigned long end_addr, unsigned long *nr_accounted, struct zap_details *); |
