From 8b2e9b712f6139df9c754af0d67fecc4bbc88545 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 20 Nov 2013 14:41:47 -0800 Subject: Revert "mm: create a separate slab for page->ptl allocation" This reverts commit ea1e7ed33708c7a760419ff9ded0a6cb90586a50. Al points out that while the commit *does* actually create a separate slab for the page->ptl allocation, that slab is never actually used, and the code continues to use kmalloc/kfree. Damien Wyart points out that the original patch did have the conversion to use kmem_cache_alloc/free, so it got lost somewhere on its way to me. Revert the half-arsed attempt that didn't do anything. If we really do want the special slab (remember: this is all relevant just for debug builds, so it's not necessarily all that critical) we might as well redo the patch fully. Reported-by: Al Viro Acked-by: Andrew Morton Cc: Kirill A Shutemov Signed-off-by: Linus Torvalds --- mm/memory.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'mm/memory.c') diff --git a/mm/memory.c b/mm/memory.c index 0409e8f43fa0..5d9025f3b3e1 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4272,13 +4272,6 @@ void copy_user_huge_page(struct page *dst, struct page *src, #endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLBFS */ #if USE_SPLIT_PTE_PTLOCKS && BLOATED_SPINLOCKS -static struct kmem_cache *page_ptl_cachep; -void __init ptlock_cache_init(void) -{ - page_ptl_cachep = kmem_cache_create("page->ptl", sizeof(spinlock_t), 0, - SLAB_PANIC, NULL); -} - bool ptlock_alloc(struct page *page) { spinlock_t *ptl; -- cgit v1.2.3