From a8e99259e7e32b67af2b447f0a570813c0c283ec Mon Sep 17 00:00:00 2001 From: Michal Hocko Date: Wed, 22 Feb 2017 15:46:10 -0800 Subject: [PATCH] mm, page_alloc: warn_alloc print nodemask warn_alloc is currently used for to report an allocation failure or an allocation stall. We print some details of the allocation request like the gfp mask and the request order. We do not print the allocation nodemask which is important when debugging the reason for the allocation failure as well. We alreaddy print the nodemask in the OOM report. Add nodemask to warn_alloc and print it in warn_alloc as well. Link: http://lkml.kernel.org/r/20170117091543.25850-3-mhocko@kernel.org Signed-off-by: Michal Hocko Acked-by: Mel Gorman Acked-by: Hillf Danton Cc: Johannes Weiner Cc: Vlastimil Babka Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mm.h | 4 ++-- mm/page_alloc.c | 10 ++++++---- mm/vmalloc.c | 4 ++-- 3 files changed, 10 insertions(+), 8 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index dae6f58d67c8..28b6c3f8a7f3 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1942,8 +1942,8 @@ extern void si_meminfo_node(struct sysinfo *val, int nid); extern unsigned long arch_reserved_kernel_pages(void); #endif -extern __printf(2, 3) -void warn_alloc(gfp_t gfp_mask, const char *fmt, ...); +extern __printf(3, 4) +void warn_alloc(gfp_t gfp_mask, nodemask_t *nodemask, const char *fmt, ...); extern void setup_per_cpu_pageset(void); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index cf6b53dc08f9..96c8fe602dfb 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3028,12 +3028,13 @@ static void warn_alloc_show_mem(gfp_t gfp_mask) show_mem(filter); } -void warn_alloc(gfp_t gfp_mask, const char *fmt, ...) +void warn_alloc(gfp_t gfp_mask, nodemask_t *nodemask, const char *fmt, ...) { struct va_format vaf; va_list args; static DEFINE_RATELIMIT_STATE(nopage_rs, DEFAULT_RATELIMIT_INTERVAL, DEFAULT_RATELIMIT_BURST); + nodemask_t *nm = (nodemask) ? nodemask : &cpuset_current_mems_allowed; if ((gfp_mask & __GFP_NOWARN) || !__ratelimit(&nopage_rs) || debug_guardpage_minorder() > 0) @@ -3047,7 +3048,8 @@ void warn_alloc(gfp_t gfp_mask, const char *fmt, ...) pr_cont("%pV", &vaf); va_end(args); - pr_cont(", mode:%#x(%pGg)\n", gfp_mask, &gfp_mask); + pr_cont(", mode:%#x(%pGg), nodemask=%*pbl\n", gfp_mask, &gfp_mask, nodemask_pr_args(nm)); + cpuset_print_current_mems_allowed(); dump_stack(); warn_alloc_show_mem(gfp_mask); @@ -3724,7 +3726,7 @@ retry: /* Make sure we know about allocations which stall for too long */ if (time_after(jiffies, alloc_start + stall_timeout)) { - warn_alloc(gfp_mask, + warn_alloc(gfp_mask, ac->nodemask, "page allocation stalls for %ums, order:%u", jiffies_to_msecs(jiffies-alloc_start), order); stall_timeout += 10 * HZ; @@ -3775,7 +3777,7 @@ nopage: if (read_mems_allowed_retry(cpuset_mems_cookie)) goto retry_cpuset; - warn_alloc(gfp_mask, + warn_alloc(gfp_mask, ac->nodemask, "page allocation failure: order:%u", order); got_pg: return page; diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 5f5b09e9dccd..d89034a393f2 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1662,7 +1662,7 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask, return area->addr; fail: - warn_alloc(gfp_mask, + warn_alloc(gfp_mask, NULL, "vmalloc: allocation failure, allocated %ld of %ld bytes", (area->nr_pages*PAGE_SIZE), area->size); vfree(area->addr); @@ -1724,7 +1724,7 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align, return addr; fail: - warn_alloc(gfp_mask, + warn_alloc(gfp_mask, NULL, "vmalloc: allocation failure: %lu bytes", real_size); return NULL; } -- 2.20.1