diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 1f3c26992e90..2a6fe377cafc 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3020,32 +3020,36 @@ retry: * allocations are system rather than user orientated */ ac->zonelist = node_zonelist(numa_node_id(), gfp_mask); - do { - page = get_page_from_freelist(gfp_mask, order, - ALLOC_NO_WATERMARKS, ac); - if (page) - goto got_pg; - - if (gfp_mask & __GFP_NOFAIL) - wait_iff_congested(ac->preferred_zone, - BLK_RW_ASYNC, HZ/50); - } while (gfp_mask & __GFP_NOFAIL); + page = get_page_from_freelist(gfp_mask, order, + ALLOC_NO_WATERMARKS, ac); + if (page) + goto got_pg; } /* Caller is not willing to reclaim, we can't balance anything */ if (!can_direct_reclaim) { /* - * All existing users of the deprecated __GFP_NOFAIL are - * blockable, so warn of any new users that actually allow this - * type of allocation to fail. + * All existing users of the __GFP_NOFAIL are blockable, so warn + * of any new users that actually allow this type of allocation + * to fail. */ WARN_ON_ONCE(gfp_mask & __GFP_NOFAIL); goto nopage; } /* Avoid recursion of direct reclaim */ - if (current->flags & PF_MEMALLOC) + if (current->flags & PF_MEMALLOC) { + /* + * __GFP_NOFAIL request from this context is rather bizarre + * because we cannot reclaim anything and only can loop waiting + * for somebody to do a work for us. + */ + if (WARN_ON_ONCE(gfp_mask & __GFP_NOFAIL)) { + cond_resched(); + goto retry; + } goto nopage; + } /* Avoid allocations with no watermarks from looping endlessly */ if (test_thread_flag(TIF_MEMDIE) && !(gfp_mask & __GFP_NOFAIL)) |