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Diffstat (limited to 'mm/vmalloc.c')
-rw-r--r--mm/vmalloc.c41
1 files changed, 32 insertions, 9 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index ba6b0f5f7fac..f3f6e0758562 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -77,7 +77,6 @@ static void vunmap_page_range(unsigned long addr, unsigned long end)
BUG_ON(addr >= end);
pgd = pgd_offset_k(addr);
- flush_cache_vunmap(addr, end);
do {
next = pgd_addr_end(addr, end);
if (pgd_none_or_clear_bad(pgd))
@@ -324,14 +323,14 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
BUG_ON(size & ~PAGE_MASK);
- addr = ALIGN(vstart, align);
-
va = kmalloc_node(sizeof(struct vmap_area),
gfp_mask & GFP_RECLAIM_MASK, node);
if (unlikely(!va))
return ERR_PTR(-ENOMEM);
retry:
+ addr = ALIGN(vstart, align);
+
spin_lock(&vmap_area_lock);
/* XXX: could have a last_hole cache */
n = vmap_area_root.rb_node;
@@ -362,7 +361,7 @@ retry:
goto found;
}
- while (addr + size >= first->va_start && addr + size <= vend) {
+ while (addr + size > first->va_start && addr + size <= vend) {
addr = ALIGN(first->va_end + PAGE_SIZE, align);
n = rb_next(&first->rb_node);
@@ -522,24 +521,45 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
}
/*
+ * Kick off a purge of the outstanding lazy areas. Don't bother if somebody
+ * is already purging.
+ */
+static void try_purge_vmap_area_lazy(void)
+{
+ unsigned long start = ULONG_MAX, end = 0;
+
+ __purge_vmap_area_lazy(&start, &end, 0, 0);
+}
+
+/*
* Kick off a purge of the outstanding lazy areas.
*/
static void purge_vmap_area_lazy(void)
{
unsigned long start = ULONG_MAX, end = 0;
- __purge_vmap_area_lazy(&start, &end, 0, 0);
+ __purge_vmap_area_lazy(&start, &end, 1, 0);
}
/*
- * Free and unmap a vmap area
+ * Free and unmap a vmap area, caller ensuring flush_cache_vunmap had been
+ * called for the correct range previously.
*/
-static void free_unmap_vmap_area(struct vmap_area *va)
+static void free_unmap_vmap_area_noflush(struct vmap_area *va)
{
va->flags |= VM_LAZY_FREE;
atomic_add((va->va_end - va->va_start) >> PAGE_SHIFT, &vmap_lazy_nr);
if (unlikely(atomic_read(&vmap_lazy_nr) > lazy_max_pages()))
- purge_vmap_area_lazy();
+ try_purge_vmap_area_lazy();
+}
+
+/*
+ * Free and unmap a vmap area
+ */
+static void free_unmap_vmap_area(struct vmap_area *va)
+{
+ flush_cache_vunmap(va->va_start, va->va_end);
+ free_unmap_vmap_area_noflush(va);
}
static struct vmap_area *find_vmap_area(unsigned long addr)
@@ -723,7 +743,7 @@ static void free_vmap_block(struct vmap_block *vb)
spin_unlock(&vmap_block_tree_lock);
BUG_ON(tmp != vb);
- free_unmap_vmap_area(vb->va);
+ free_unmap_vmap_area_noflush(vb->va);
call_rcu(&vb->rcu_head, rcu_free_vb);
}
@@ -785,6 +805,9 @@ static void vb_free(const void *addr, unsigned long size)
BUG_ON(size & ~PAGE_MASK);
BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC);
+
+ flush_cache_vunmap((unsigned long)addr, (unsigned long)addr + size);
+
order = get_order(size);
offset = (unsigned long)addr & (VMAP_BLOCK_SIZE - 1);