Qu'est-ce que "Lost RAM" dans dumpsys meminfo ?

Vous trouverez ci-dessous un exemple dumpsys avec Lost RAM. Quelle est sa signification dans KitKat ? Comment peut-elle être récupérée et utilisée ?

Total PSS by OOM adjustment:
    31841 kB: Native
               13173 kB: zygote (pid 23001)
                4372 kB: surfaceflinger (pid 23000)
                3721 kB: mediaserver (pid 126)
                3317 kB: glgps (pid 22993)
                1656 kB: drmserver (pid 125)
                 995 kB: wpa_supplicant (pid 23148)
                 786 kB: netd (pid 121)
                 518 kB: sdcard (pid 132)
                 475 kB: vold (pid 119)
                 458 kB: keystore (pid 128)
                 448 kB: /init (pid 1)
                 412 kB: adbd (pid 134)
                 254 kB: ueventd (pid 108)
                 238 kB: dhcpcd (pid 10617)
                 229 kB: tf_daemon (pid 130)
                 200 kB: installd (pid 127)
                 185 kB: dumpsys (pid 14207)
                 144 kB: healthd (pid 117)
                 139 kB: debuggerd (pid 122)
                 121 kB: servicemanager (pid 118)
    48217 kB: System
               48217 kB: system (pid 23064)
    49095 kB: Persistent
               34012 kB: com.android.systemui (pid 23163 / activities)
                7719 kB: com.android.phone (pid 23357)
                4676 kB: com.android.nfc (pid 23371)
                2688 kB: com.nuance.xt9.input (pid 23344)
    24945 kB: Foreground
               24945 kB: com.android.settings (pid 24811 / activities)
    17136 kB: Visible
               14026 kB: com.google.process.location (pid 23472)
                3110 kB: com.android.defcontainer (pid 13976)
     6911 kB: Perceptible
                6911 kB: com.google.android.inputmethod.latin (pid 23298)
    14277 kB: A Services
               14277 kB: com.google.process.gapps (pid 23513)
    26422 kB: Home
               26422 kB: com.android.launcher (pid 23395 / activities)
    21798 kB: B Services
               16242 kB: com.google.android.apps.currents (pid 23767)
                5556 kB: android.process.media (pid 7738)
   145869 kB: Cached
               41588 kB: com.google.android.apps.plus (pid 24689)
               21417 kB: com.google.android.deskclock (pid 23966 / activities)
               14463 kB: com.google.android.apps.docs (pid 8644)
               14303 kB: com.google.android.gm (pid 9115)
               11014 kB: com.google.android.music:main (pid 7716)
               10688 kB: com.google.android.apps.magazines (pid 13892)
               10240 kB: com.google.android.gms (pid 23338)
                9882 kB: com.google.android.youtube (pid 5131)
                8807 kB: com.google.android.apps.walletnfcrel (pid 8937)
                3467 kB: com.google.android.setupwizard (pid 8922)

Total RAM: 998096 kB
 Free RAM: 574945 kB (145869 cached pss + 393200 cached + 35876 free)
 Used RAM: 392334 kB (240642 used pss + 107196 buffers + 3856 shmem + 40640 slab)
 Lost RAM: 30817 kB
   Tuning: 64 (large 384), oom 122880 kB, restore limit 40960 kB (high-end-gfx)