From 6e2e615a2f59f5b8d1b8312c5f8cc596b927be9f Mon Sep 17 00:00:00 2001 From: Aubrey.Li Date: Wed, 13 Sep 2006 15:01:23 +0800 Subject: [PATCH] Make the SLOB allocator mark its pages with PG_slab. Signed-off-by: Aubrey.Li --- mm/slob.c | 20 ++++++++++++++------ 1 files changed, 14 insertions(+), 6 deletions(-) diff --git a/mm/slob.c b/mm/slob.c index 7b52b20..05f0d16 100644 --- a/mm/slob.c +++ b/mm/slob.c @@ -109,6 +109,7 @@ static void *slob_alloc(size_t size, gfp slob_free(cur, PAGE_SIZE); spin_lock_irqsave(&slob_lock, flags); + SetPageSlab(virt_to_page(cur)); cur = slobfree; } } @@ -173,12 +174,17 @@ void *kmalloc(size_t size, gfp_t gfp) return 0; bb->order = find_order(size); - bb->pages = (void *)__get_free_pages(gfp, bb->order); + page = alloc_pages(gfp, bb->order); + bb->pages = page_address(page); if (bb->pages) { spin_lock_irqsave(&block_lock, flags); bb->next = bigblocks; bigblocks = bb; + for (i = 0; i < (1 << bb->order); i++) { + SetPageSlab(page); + page++; + } spin_unlock_irqrestore(&block_lock, flags); return bb->pages; } @@ -202,8 +208,15 @@ void kfree(const void *block) spin_lock_irqsave(&block_lock, flags); for (bb = bigblocks; bb; last = &bb->next, bb = bb->next) { if (bb->pages == block) { + struct page *page = virt_to_page(bb->pages); + int i; + *last = bb->next; spin_unlock_irqrestore(&block_lock, flags); + for (i = 0; i < (1 << bb->order); i++) { + ClearPageSlab(page); + page++; + } free_pages((unsigned long)block, bb->order); slob_free(bb, sizeof(bigblock_t)); return; @@ -332,11 +345,6 @@ static struct timer_list slob_timer = TI void kmem_cache_init(void) { - void *p = slob_alloc(PAGE_SIZE, 0, PAGE_SIZE-1); - - if (p) - free_page((unsigned long)p); - mod_timer(&slob_timer, jiffies + HZ); } -- 1.4.0