Describe the purpose of struct oom_control and what each member does.
Also make gfp_mask and order const since they are never manipulated or
passed to functions that discard the qualifier.
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
---
include/linux/oom.h | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/include/linux/oom.h b/include/linux/oom.h
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -12,11 +12,25 @@ struct notifier_block;
struct mem_cgroup;
struct task_struct;
+/*
+ * Details of the page allocation that triggered the oom killer that are used to
+ * determine what should be killed.
+ */
struct oom_control {
+ /* Used to determine cpuset */
struct zonelist *zonelist;
- nodemask_t *nodemask;
- gfp_t gfp_mask;
- int order;
+
+ /* Used to determine mempolicy */
+ nodemask_t *nodemask;
+
+ /* Used to determine cpuset and node locality requirement */
+ const gfp_t gfp_mask;
+
+ /*
+ * order == -1 means the oom kill is required by sysrq, otherwise only
+ * for display purposes.
+ */
+ const int order;
};
/*
--
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