diff options
| author | Linus Torvalds <torvalds@g5.osdl.org> | 2005-12-16 13:21:23 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-12-16 13:21:23 -0500 |
| commit | 4d7672b46244abffea1953e55688c0ea143dd617 (patch) | |
| tree | 9f3bdf438bcb0d5f6e723665ced23308fffb8368 /include/linux | |
| parent | 281ab031a8c9e5b593142eb4ec59a87faae8676a (diff) | |
Make sure we copy pages inserted with "vm_insert_page()" on fork
The logic that decides that a fork() might be able to avoid copying a VM
area when it can be re-created by page faults didn't know about the new
vm_insert_page() case.
Also make some things a bit more anal wrt VM_PFNMAP.
Pointed out by Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index e5677f456742..a06a84d347fb 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h | |||
| @@ -163,6 +163,7 @@ extern unsigned int kobjsize(const void *objp); | |||
| 163 | #define VM_HUGETLB 0x00400000 /* Huge TLB Page VM */ | 163 | #define VM_HUGETLB 0x00400000 /* Huge TLB Page VM */ |
| 164 | #define VM_NONLINEAR 0x00800000 /* Is non-linear (remap_file_pages) */ | 164 | #define VM_NONLINEAR 0x00800000 /* Is non-linear (remap_file_pages) */ |
| 165 | #define VM_MAPPED_COPY 0x01000000 /* T if mapped copy of data (nommu mmap) */ | 165 | #define VM_MAPPED_COPY 0x01000000 /* T if mapped copy of data (nommu mmap) */ |
| 166 | #define VM_INSERTPAGE 0x02000000 /* The vma has had "vm_insert_page()" done on it */ | ||
| 166 | 167 | ||
| 167 | #ifndef VM_STACK_DEFAULT_FLAGS /* arch can override this */ | 168 | #ifndef VM_STACK_DEFAULT_FLAGS /* arch can override this */ |
| 168 | #define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS | 169 | #define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS |