@@ -954,8 +954,6 @@ static int check_slab(struct kmem_cache *s, struct page *page)
{
int maxobj;
- VM_BUG_ON(!irqs_disabled());
-
if (!PageSlab(page)) {
slab_err(s, page, "Not a valid slab page");
return 0;
@@ -2729,10 +2727,10 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
lockdep_assert_irqs_disabled();
freelist = get_partial(s, gfpflags, node, &page);
+ local_irq_restore(flags);
if (freelist)
goto check_new_page;
- local_irq_restore(flags);
put_cpu_ptr(s->cpu_slab);
page = new_slab(s, gfpflags, node);
c = get_cpu_ptr(s->cpu_slab);
@@ -2742,7 +2740,6 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
return NULL;
}
- local_irq_save(flags);
/*
* No other reference to the page yet so we can
* muck around with it freely without cmpxchg
@@ -2757,7 +2754,6 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
if (kmem_cache_debug(s)) {
if (!alloc_debug_processing(s, page, freelist, addr)) {
/* Slab failed checks. Next slab needed */
- local_irq_restore(flags);
goto new_slab;
} else {
/*
@@ -2775,6 +2771,7 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
*/
goto return_single;
+ local_irq_save(flags);
if (unlikely(c->page))
flush_slab(s, c);
c->page = page;
@@ -2783,6 +2780,7 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
return_single:
+ local_irq_save(flags);
if (unlikely(c->page))
flush_slab(s, c);
c->page = page;
Building on top of the previous patch, re-enable irqs before checking new pages. alloc_debug_processing() is now called with enabled irqs so we need to remove VM_BUG_ON(!irqs_disabled()); in check_slab() - there doesn't seem to be a need for it anyway. Signed-off-by: Vlastimil Babka <vbabka@suse.cz> --- mm/slub.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)