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2023-11-20 2e7bd41e4e8ab3d1efdabd9e263a2f7fe79bff8c

 kernel/include/linux/memcontrol.h
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@@ -665,6 +665,7 @@
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 	pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
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+	preempt_disable_rt();
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 	/* Update memcg */
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 	__mod_memcg_state(pn->memcg, idx, val);
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@@ -675,6 +676,7 @@
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 		x = 0;
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 	}
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 	__this_cpu_write(pn->lruvec_stat_cpu->count[idx], x);
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+	preempt_enable_rt();
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 }
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 static inline void mod_lruvec_state(struct lruvec *lruvec,