We need mm_struct for discarding vrange pages in kswapd context. It's a preparatoin for it.
Signed-off-by: Minchan Kim <[email protected]> --- include/linux/vrange.h | 1 + mm/vrange.c | 20 +++++++++++--------- 2 files changed, 12 insertions(+), 9 deletions(-) diff --git a/include/linux/vrange.h b/include/linux/vrange.h index 24ed4c1..5238a67 100644 --- a/include/linux/vrange.h +++ b/include/linux/vrange.h @@ -11,6 +11,7 @@ static DECLARE_RWSEM(vrange_fork_lock); struct vrange { struct interval_tree_node node; bool purged; + struct mm_struct *mm; }; #define vrange_entry(ptr) \ diff --git a/mm/vrange.c b/mm/vrange.c index 89fcae4..f4c1d04 100644 --- a/mm/vrange.c +++ b/mm/vrange.c @@ -29,8 +29,9 @@ static inline void __set_vrange(struct vrange *range, } static void __add_range(struct vrange *range, - struct rb_root *root) + struct rb_root *root, struct mm_struct *mm) { + range->mm = mm; interval_tree_insert(&range->node, root); } @@ -52,11 +53,12 @@ static void free_vrange(struct vrange *range) static inline void range_resize(struct rb_root *root, struct vrange *range, - unsigned long start, unsigned long end) + unsigned long start, unsigned long end, + struct mm_struct *mm) { __remove_range(range, root); __set_vrange(range, start, end); - __add_range(range, root); + __add_range(range, root, mm); } int add_vrange(struct mm_struct *mm, @@ -95,8 +97,7 @@ int add_vrange(struct mm_struct *mm, __set_vrange(new_range, start, end); new_range->purged = purged; - - __add_range(new_range, root); + __add_range(new_range, root, mm); out: vrange_unlock(mm); return 0; @@ -129,15 +130,16 @@ int remove_vrange(struct mm_struct *mm, __remove_range(range, root); free_vrange(range); } else if (node->start >= start) { - range_resize(root, range, end, node->last); + range_resize(root, range, end, node->last, mm); } else if (node->last <= end) { - range_resize(root, range, node->start, start); + range_resize(root, range, node->start, start, mm); } else { used_new = true; __set_vrange(new_range, end, node->last); new_range->purged = range->purged; - range_resize(root, range, node->start, start); - __add_range(new_range, root); + new_range->mm = mm; + range_resize(root, range, node->start, start, mm); + __add_range(new_range, root, mm); break; } -- 1.8.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
