提交 f78bb8ad 编写于 作者: L Linus Torvalds

slab: fix calculate_slab_order() for SLAB_RECLAIM_ACCOUNT

Instead of having a hard-to-read and confusing conditional in the
caller, just make the slab order calculation handle this special case,
since it's simple and obvious there.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 7986824e
......@@ -1647,6 +1647,14 @@ static inline size_t calculate_slab_order(struct kmem_cache *cachep,
cachep->gfporder = gfporder;
left_over = remainder;
/*
* A VFS-reclaimable slab tends to have most allocations
* as GFP_NOFS and we really don't want to have to be allocating
* higher-order pages when we are unable to shrink dcache.
*/
if (flags & SLAB_RECLAIM_ACCOUNT)
break;
/*
* Large number of objects is good, but very large slabs are
* currently bad for the gfp()s.
......@@ -1869,17 +1877,7 @@ kmem_cache_create (const char *name, size_t size, size_t align,
size = ALIGN(size, align);
if ((flags & SLAB_RECLAIM_ACCOUNT) && size <= PAGE_SIZE) {
/*
* A VFS-reclaimable slab tends to have most allocations
* as GFP_NOFS and we really don't want to have to be allocating
* higher-order pages when we are unable to shrink dcache.
*/
cachep->gfporder = 0;
cache_estimate(cachep->gfporder, size, align, flags,
&left_over, &cachep->num);
} else
left_over = calculate_slab_order(cachep, size, align, flags);
left_over = calculate_slab_order(cachep, size, align, flags);
if (!cachep->num) {
printk("kmem_cache_create: couldn't create cache %s.\n", name);
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册