From 09ad4bbc3a5c93316d7f4ffc0c310d9cbb28c2f0 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Sat, 29 Oct 2005 18:15:52 -0700 Subject: [PATCH] [PATCH] slab: add additional debugging to detect slabs from the wrong node This patch adds some stack dumps if the slab logic is processing slab blocks from the wrong node. This is necessary in order to detect situations as encountered by Petr. Signed-off-by: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/slab.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/slab.c b/mm/slab.c index d30423f167a..22bfb0b2ac8 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -2419,6 +2419,7 @@ retry: next = slab_bufctl(slabp)[slabp->free]; #if DEBUG slab_bufctl(slabp)[slabp->free] = BUFCTL_FREE; + WARN_ON(numa_node_id() != slabp->nodeid); #endif slabp->free = next; } @@ -2633,8 +2634,10 @@ static void free_block(kmem_cache_t *cachep, void **objpp, int nr_objects, int n check_spinlock_acquired_node(cachep, node); check_slabp(cachep, slabp); - #if DEBUG + /* Verify that the slab belongs to the intended node */ + WARN_ON(slabp->nodeid != node); + if (slab_bufctl(slabp)[objnr] != BUFCTL_FREE) { printk(KERN_ERR "slab: double free detected in cache " "'%s', objp %p\n", cachep->name, objp); -- 2.20.1