最終更新:2016-09-13 (火) 17:03:14 (2778d)  

lowmemorykiller
Top / lowmemorykiller

Linuxカーネル

↑

.config

↑

～Linux 3.19

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sysfs

  • Android/sys/module/lowmemorykiller 
     * For example, write "0,8" to /sys/module/lowmemorykiller/parameters/adj and
 * "1024,4096" to /sys/module/lowmemorykiller/parameters/minfree to kill
 * processes with a oom_score_adj value of 8 or higher when the free memory
 * drops below 4096 pages and kill processes with a oom_score_adj value of 0 or
 * higher when the free memory drops below 1024 pages.
↑

dmesg 

  • lowmem_print(1, "Killing '%s' (%d), adj %hd,\n" \
				"   to free %ldkB on behalf of '%s' (%d) because\n" \
				"   cache %ldkB is below limit %ldkB for oom_score_adj %hd\n" \
				"   Free memory is %ldkB above reserved\n",
			     selected->comm, selected->pid,
			     selected_oom_score_adj,
			     selected_tasksize * (long)(PAGE_SIZE / 1024),
			     current->comm, current->pid,
			     cache_size, cache_limit,
			     min_score_adj,
			     free);
  • selected - task_struct
↑

Android側

↑

AOSP

↑

アクセス

  • Android/dev/memcg?



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