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 <mhocko@suse.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/mm.h b/include/linux/mm.h
index dae6f58..28b6c3f 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 cf6b53d..96c8fe6 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 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
/* 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 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
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 5f5b09e..d89034a 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;
}