diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/cma.c | 7 | ||||
| -rw-r--r-- | mm/list_lru.c | 2 | ||||
| -rw-r--r-- | mm/memcontrol.c | 9 | ||||
| -rw-r--r-- | mm/vmscan.c | 2 |
4 files changed, 17 insertions, 3 deletions
@@ -183,7 +183,8 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, return -EINVAL; /* ensure minimal alignment required by mm core */ - alignment = PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order); + alignment = PAGE_SIZE << + max_t(unsigned long, MAX_ORDER - 1, pageblock_order); /* alignment should be aligned with order_per_bit */ if (!IS_ALIGNED(alignment >> PAGE_SHIFT, 1 << order_per_bit)) @@ -266,8 +267,8 @@ int __init cma_declare_contiguous(phys_addr_t base, * migratetype page by page allocator's buddy algorithm. In the case, * you couldn't get a contiguous memory, which is not what we want. */ - alignment = max(alignment, - (phys_addr_t)PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order)); + alignment = max(alignment, (phys_addr_t)PAGE_SIZE << + max_t(unsigned long, MAX_ORDER - 1, pageblock_order)); base = ALIGN(base, alignment); size = ALIGN(size, alignment); limit &= ~(alignment - 1); diff --git a/mm/list_lru.c b/mm/list_lru.c index afc71ea9a381..5d8dffd5b57c 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -554,6 +554,8 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware, err = memcg_init_list_lru(lru, memcg_aware); if (err) { kfree(lru->node); + /* Do this so a list_lru_destroy() doesn't crash: */ + lru->node = NULL; goto out; } diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 6b90d184e9c0..5d9c8a3136bc 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2055,6 +2055,15 @@ retry: current->flags & PF_EXITING)) goto force; + /* + * Prevent unbounded recursion when reclaim operations need to + * allocate memory. This might exceed the limits temporarily, + * but we prefer facilitating memory reclaim and getting back + * under the limit over triggering OOM kills in these cases. + */ + if (unlikely(current->flags & PF_MEMALLOC)) + goto force; + if (unlikely(task_in_memcg_oom(current))) goto nomem; diff --git a/mm/vmscan.c b/mm/vmscan.c index 0838e9f02b11..de1c59d8daa3 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2910,7 +2910,9 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg, sc.may_writepage, sc.gfp_mask); + current->flags |= PF_MEMALLOC; nr_reclaimed = do_try_to_free_pages(zonelist, &sc); + current->flags &= ~PF_MEMALLOC; trace_mm_vmscan_memcg_reclaim_end(nr_reclaimed); |