mm, oom: add description of struct oom_control
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@google.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -12,11 +12,25 @@ struct notifier_block;
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struct mem_cgroup;
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struct mem_cgroup;
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struct task_struct;
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struct task_struct;
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/*
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* Details of the page allocation that triggered the oom killer that are used to
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* determine what should be killed.
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*/
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struct oom_control {
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struct oom_control {
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/* Used to determine cpuset */
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struct zonelist *zonelist;
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struct zonelist *zonelist;
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nodemask_t *nodemask;
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gfp_t gfp_mask;
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/* Used to determine mempolicy */
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int order;
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nodemask_t *nodemask;
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/* Used to determine cpuset and node locality requirement */
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const gfp_t gfp_mask;
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/*
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* order == -1 means the oom kill is required by sysrq, otherwise only
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* for display purposes.
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*/
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const int order;
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};
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};
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/*
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/*
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