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memcg: flatten task_struct->memcg_oom
task_struct->memcg_oom is a sub-struct containing fields which are used for async memcg oom handling. Most task_struct fields aren't packaged this way and it can lead to unnecessary alignment paddings. This patch flattens it. * task.memcg_oom.memcg -> task.memcg_in_oom * task.memcg_oom.gfp_mask -> task.memcg_oom_gfp_mask * task.memcg_oom.order -> task.memcg_oom_order * task.memcg_oom.may_oom -> task.memcg_may_oom In addition, task.memcg_may_oom is relocated to where other bitfields are which reduces the size of task_struct. Signed-off-by: Tejun Heo <[email protected]> Acked-by: Michal Hocko <[email protected]> Reviewed-by: Vladimir Davydov <[email protected]> Acked-by: Johannes Weiner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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