Messages in this thread Patch in this message | | | From | hui yang <> | Subject | [PATCH v2] mm: LMK, adjust oom_score_adj when fork a new process | Date | Thu, 13 Aug 2020 10:53:31 +0800 |
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From: YangHui <yanghui.def@gmail.com>
Also it rely on inheritance,But there are some things you need't inheriting if all children oom_score_adj is -1000,the oom is meaningless
Signed-off-by: YangHui <yanghui.def@gmail.com> --- include/uapi/linux/oom.h | 1 + kernel/fork.c | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/uapi/linux/oom.h b/include/uapi/linux/oom.h index 750b1c5..0251f23 100644 --- a/include/uapi/linux/oom.h +++ b/include/uapi/linux/oom.h @@ -8,6 +8,7 @@ */ #define OOM_SCORE_ADJ_MIN (-1000) #define OOM_SCORE_ADJ_MAX 1000 +#define OOM_SCORE_ADJ_DEFAULT 0 /* * /proc/<pid>/oom_adj set to -17 protects from the oom killer for legacy diff --git a/kernel/fork.c b/kernel/fork.c index 4d32190..9dfa388 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1584,8 +1584,8 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk) tty_audit_fork(sig); sched_autogroup_fork(sig); - sig->oom_score_adj = current->signal->oom_score_adj; - sig->oom_score_adj_min = current->signal->oom_score_adj_min; + sig->oom_score_adj = OOM_SCORE_ADJ_DEFAULT; + sig->oom_score_adj_min = OOM_SCORE_ADJ_MIN; mutex_init(&sig->cred_guard_mutex); mutex_init(&sig->exec_update_mutex); -- 2.7.4
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