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| author |   Christoph Lameter <clameter@engr.sgi.com> | 2007-03-05 00:30:33 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-05 07:57:51 -0800 |
| commit | 0dc952dc3e6d96d554a19fa7bee3f3b1d55e3cff (patch) | |
| tree | 1dcf2ff93784716143b7acef816888a71a9504c2 /include | |
| parent | [PATCH] fb: sm501fb off-by-1 sysfs store (diff) | |
| download | linux-dev-0dc952dc3e6d96d554a19fa7bee3f3b1d55e3cff.tar.xz linux-dev-0dc952dc3e6d96d554a19fa7bee3f3b1d55e3cff.zip | |
[PATCH] Page migration: Fix vma flag checking
Currently we do not check for vma flags if sys_move_pages is called to move
individual pages. If sys_migrate_pages is called to move pages then we
check for vm_flags that indicate a non migratable vma but that still
includes VM_LOCKED and we can migrate mlocked pages.
Extract the vma_migratable check from mm/mempolicy.c, fix it and put it
into migrate.h so that is can be used from both locations.
Problem was spotted by Lee Schermerhorn
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/migrate.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 48148e0cdbd1..75e55dcdeb18 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -5,6 +5,14 @@ typedef struct page *new_page_t(struct page *, unsigned long private, int **); +/* Check if a vma is migratable */ +static inline int vma_migratable(struct vm_area_struct *vma) +{ + if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED)) + return 0; + return 1; +} + #ifdef CONFIG_MIGRATION extern int isolate_lru_page(struct page *p, struct list_head *pagelist); extern int putback_lru_pages(struct list_head *l); |