diff options
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/mm/slub.c b/mm/slub.c index e517d435e5dc..c3f05e1599c0 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -34,6 +34,8 @@ #include <trace/events/kmem.h> +#include "internal.h" + /* * Lock order: * 1. slab_mutex (Global Mutex) @@ -1354,6 +1356,8 @@ static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node) inc_slabs_node(s, page_to_nid(page), page->objects); page->slab = s; __SetPageSlab(page); + if (page->pfmemalloc) + SetPageSlabPfmemalloc(page); start = page_address(page); @@ -1397,6 +1401,7 @@ static void __free_slab(struct kmem_cache *s, struct page *page) NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE, -pages); + __ClearPageSlabPfmemalloc(page); __ClearPageSlab(page); reset_page_mapcount(page); if (current->reclaim_state) @@ -2126,6 +2131,14 @@ static inline void *new_slab_objects(struct kmem_cache *s, gfp_t flags, return freelist; } +static inline bool pfmemalloc_match(struct page *page, gfp_t gfpflags) +{ + if (unlikely(PageSlabPfmemalloc(page))) + return gfp_pfmemalloc_allowed(gfpflags); + + return true; +} + /* * Check the page->freelist of a page and either transfer the freelist to the per cpu freelist * or deactivate the page. @@ -2206,6 +2219,18 @@ redo: goto new_slab; } + /* + * By rights, we should be searching for a slab page that was + * PFMEMALLOC but right now, we are losing the pfmemalloc + * information when the page leaves the per-cpu allocator + */ + if (unlikely(!pfmemalloc_match(page, gfpflags))) { + deactivate_slab(s, page, c->freelist); + c->page = NULL; + c->freelist = NULL; + goto new_slab; + } + /* must check again c->freelist in case of cpu migration or IRQ */ freelist = c->freelist; if (freelist) @@ -2312,8 +2337,8 @@ redo: object = c->freelist; page = c->page; - if (unlikely(!object || !node_match(page, node))) - + if (unlikely(!object || !node_match(page, node) || + !pfmemalloc_match(page, gfpflags))) object = __slab_alloc(s, gfpflags, node, addr, c); else { |