[PATCH v2 9/9] mm, oom: print symbolic gfp_flags in oom warning

Vlastimil Babka
2015-11-24T12:38:48Z

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: order=0, oom_score_adj=0, gfp_mask=0x24280ca(GFP_HIGHUSER_MOVABLE|GFP_ZERO)

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
mm/oom_kill.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 5314b20..542d56c 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -386,10 +386,12 @@ 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,
- current->signal->oom_score_adj);
+ pr_warning("%s invoked oom-killer: order=%d, oom_score_adj=%hd, "
+ "gfp_mask=0x%x",
+ current->comm, oc->order, current->signal->oom_score_adj,
+ oc->gfp_mask);
+ dump_gfpflag_names(oc->gfp_mask);
+
cpuset_print_current_mems_allowed();
dump_stack();
if (memcg)
--
2.6.3