mm, oom: print symbolic gfp_flags in oom warning

It would be useful to translate gfp_flags into string representation
when printing in case of an OOM, especially as the flags have been
undergoing some changes recently and the script ./scripts/gfp-translate
needs a matching source version to be accurate.

Example output:

  a.out invoked oom-killer: gfp_mask=0x24280ca(GFP_HIGHUSER_MOVABLE|GFP_ZERO), order=0, om_score_adj=0

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index dc490c06941b2a6be5170c0d9ca73418b7fe8619..e97a05d9621f47425a25f88fb9c0ae8fbd50004b 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -386,10 +386,11 @@ static void dump_tasks(struct mem_cgroup *memcg, const nodemask_t *nodemask)
 static void dump_header(struct oom_control *oc, struct task_struct *p,
                        struct mem_cgroup *memcg)
 {
-       pr_warning("%s invoked oom-killer: gfp_mask=0x%x, order=%d, "
-               "oom_score_adj=%hd\n",
-               current->comm, oc->gfp_mask, oc->order,
+       pr_warn("%s invoked oom-killer: gfp_mask=%#x(%pGg), order=%d, "
+                       "oom_score_adj=%hd\n",
+               current->comm, oc->gfp_mask, &oc->gfp_mask, oc->order,
                current->signal->oom_score_adj);
+
        cpuset_print_current_mems_allowed();
        dump_stack();
        if (memcg)