[PATCH] Avoiding mmap fragmentation

[linux-2.6] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index f42a17f88699bb4c1a07b4f93961c92e3c5d75a5..876b31cd822d2669b5831b31707aabfdba676304 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -194,6 +194,7 @@ static inline int dup_mmap(struct mm_struct * mm, struct mm_struct * oldmm)
        mm->mmap = NULL;
        mm->mmap_cache = NULL;
        mm->free_area_cache = oldmm->mmap_base;
+       mm->cached_hole_size = ~0UL;
        mm->map_count = 0;
        set_mm_counter(mm, rss, 0);
        set_mm_counter(mm, anon_rss, 0);
@@ -322,6 +323,7 @@ static struct mm_struct * mm_init(struct mm_struct * mm)
        mm->ioctx_list = NULL;
        mm->default_kioctx = (struct kioctx)INIT_KIOCTX(mm->default_kioctx, *mm);
        mm->free_area_cache = TASK_UNMAPPED_BASE;
+       mm->cached_hole_size = ~0UL;
 
        if (likely(!mm_alloc_pgd(mm))) {
                mm->def_flags = 0;