我有一个内存泄漏进程，导致 OOM 杀死其他进程。下面的OOM日志：
[3669.400 s]4,1153,3669403826,-;test_process: vmalloc: allocation failure, allocated 102400 of 135168 bytes, mode:0x6000c1(GFP_KERNEL|GFP_DMA), nodemask=(null)
[3669.400 s]6,1154,3669403836,-;test_process cpuset=/ mems_allowed=0
[3669.400 s]4,1155,3669403950,-;CPU: 0 PID: 346 Comm: test_process Tainted: G O 4.19.73 #1
[3669.400 s]4,1156,3669403956,-;Hardware name: Generic DRA74X (Flattened Device Tree)
[3669.400 s]4,1157,3669403962,-;Backtrace:
[3669.400 s]4,1158,3669403974,-;Function entered at [<c020c974>] from [<c020cc9c>]
[3669.400 s]4,1159,3669403984,-; r7:ffffe000 r6:60030013 r5:00000000 r4:c0e45958
[3669.400 s]4,1160,3669403990,-;Function entered at [<c020cc84>] from [<c0834980>]
[3669.400 s]4,1161,3669403995,-;Function entered at [<c08348f0>] from [<c02f8498>]
[3669.400 s]4,1162,3669404003,-; r7:ffffe000 r6:c0a8f28c r5:00000000 r4:c0e04c48
[3669.400 s]4,1163,3669404009,-;Function entered at [<c02f83d4>] from [<c0330e9c>]
[3669.400 s]4,1164,3669404016,-; r3:00019000 r2:c0a8f28c
[3669.400 s]4,1165,3669404023,-; r7:ffffffff r6:006000c1 r5:00000019 r4:ce342800
[3669.400 s]4,1166,3669404029,-;Function entered at [<c0330d50>] from [<c0330fec>]
[3669.400 s]4,1167,3669404037,-; r9:00000000 r8:00020000 r7:00020000 r6:02024200 r5:bf031f18 r4:cd53fc00
[3669.400 s]4,1168,3669404043,-;Function entered at [<c0330f9c>] from [<bf0052c4>]
[3669.400 s]4,1169,3669404049,-;Function entered at [<bf00523c>] from [<bf005388>]
[3669.400 s]4,1170,3669404055,-;Function entered at [<bf00533c>] from [<bf0009b4>]
[3669.400 s]4,1171,3669404063,-; r8:00020000 r7:02024200 r6:00020000 r5:c0e04c48 r4:02024200
[3669.400 s]4,1172,3669404068,-;Function entered at [<bf0008bc>] from [<bf008b84>]
[3669.400 s]4,1173,3669404074,-; r6:d7da1f80 r5:c0e04c48 r4:00000000
[3669.400 s]4,1174,3669404080,-;Function entered at [<bf0088c8>] from [<bf01316c>]
[3669.400 s]4,1175,3669404090,-; r10:bf0088c8 r9:d7679bdc r8:00000000 r7:00020000 r6:00001000 r5:c0e04c48
[3669.400 s]4,1176,3669404095,-; r4:d7eaf700
[3669.400 s]4,1177,3669404101,-;Function entered at [<bf013094>] from [<bf008f74>]
[3669.400 s]4,1178,3669404110,-; r10:0000020b r9:d7eaf700 r8:ce342100 r7:d7da1f80 r6:00000040 r5:c0e04c48
[3669.400 s]4,1179,3669404115,-; r4:00000000
[3669.400 s]4,1180,3669404120,-;Function entered at [<bf008e74>] from [<bf009790>]
[3669.400 s]4,1181,3669404129,-; r10:d7da1f80 r9:0000000b r8:00020000 r7:d7679cb0 r6:d07ed100 r5:00000000
[3669.400 s]4,1182,3669404133,-; r4:c0e04c48
[3669.400 s]4,1183,3669404139,-;Function entered at [<bf0096b8>] from [<bf00a074>]
[3669.400 s]4,1184,3669404147,-; r10:d7679d10 r9:d8a6d700 r8:d7da1f80 r7:00000000 r6:00000000 r5:0000000b
[3669.400 s]4,1185,3669404152,-; r4:c0e04c48
[3669.400 s]4,1186,3669404157,-;Function entered at [<bf009f88>] from [<bf0157cc>]
[3669.401 s]4,1187,3669404165,-; r10:d7679e2c r9:00000000 r8:d762e180 r7:f1eec000 r6:c0e04c48 r5:00000000
[3669.401 s]4,1188,3669404170,-; r4:f1eeb000
[3669.401 s]4,1189,3669404176,-;Function entered at [<bf015650>] from [<bf017b04>]
[3669.401 s]4,1190,3669404184,-; r9:0000015a r8:f1eeb000 r7:f1eec000 r6:bf015650 r5:d762e180 r4:d7679e2c
[3669.401 s]4,1191,3669404190,-;Function entered at [<bf017a70>] from [<bf0048e8>]
[3669.401 s]4,1192,3669404198,-; r8:d762e180 r7:d7eaff00 r6:c0e04c48 r5:c01c6707 r4:d7679e2c
[3669.401 s]4,1193,3669404204,-;Function entered at [<bf004808>] from [<c0590564>]
[3669.401 s]4,1194,3669404212,-; r9:bf004808 r8:00000030 r7:00000000 r6:d865b800 r5:d7eaff00 r4:c0e04c48
[3669.401 s]4,1195,3669404217,-;Function entered at [<c05904b4>] from [<c05909b4>]
[3669.401 s]4,1196,3669404225,-; r10:bf0312b0 r9:00000000 r8:bea3cc2c r7:401c6440 r6:d7eaff00 r5:d7edc240
[3669.401 s]4,1197,3669404230,-; r4:c0e04c48
[3669.401 s]4,1198,3669404235,-;Function entered at [<c059070c>] from [<c0366f4c>]
[3669.401 s]4,1199,3669404243,-; r10:d8646f60 r9:d7678000 r8:bea3cc2c r7:00000013 r6:d7edc240 r5:bea3cc2c
[3669.401 s]4,1200,3669404248,-; r4:c0e04c48
[3669.401 s]4,1201,3669404253,-;Function entered at [<c0366e94>] from [<c0367690>]
[3669.401 s]4,1202,3669404261,-; r10:00000036 r9:d7678000 r8:bea3cc2c r7:401c6440 r6:00000013 r5:d7edc240
[3669.401 s]4,1203,3669404266,-; r4:d7edc241
[3669.401 s]4,1204,3669404272,-;Function entered at [<c0367654>] from [<c03676cc>]
[3669.401 s]4,1205,3669404280,-; r9:d7678000 r8:c0201204 r7:00000036 r6:401c6440 r5:bea3cc2c r4:c01c6707
[3669.401 s]4,1206,3669404285,-;Function entered at [<c03676bc>] from [<c0201000>]
[3669.401 s]4,1207,3669404291,-;Exception stack(0xd7679fa8 to 0xd7679ff0)
[3669.401 s]4,1208,3669404299,-;9fa0: c01c6707 bea3cc2c 00000013 401c6440 bea3cc2c 0000001c
[3669.401 s]4,1209,3669404307,-;9fc0: c01c6707 bea3cc2c 401c6440 00000036 0000000b 010b8b80 00000040 00000004
[3669.401 s]4,1210,3669404314,-;9fe0: b6447094 bea3cc04 b643219b b4c2815c
[3669.401 s]6,1211,3669404603,-;PVR_K:(Error): NewVMallocLinuxMemArea: failed!
[3669.401 s]6,1212,3669404617,-;PVR_K:(Error): BM_ImportMemory: OSAllocPages(0x20000) failed
[3669.401 s]6,1213,3669404667,-;PVR_K:(Error): AllocMemory: RA_Alloc(0x20000) FAILED
[3669.401 s]6,1214,3669404679,-;PVR_K:(Error): BM_Alloc: AllocMemory FAILED
[3669.401 s]6,1215,3669404689,-;PVR_K:(Error): AllocDeviceMem: BM_Alloc Failed
[3669.401 s]6,1216,3669404702,-;PVR_K:(Error): PVRSRVAllocDeviceMemBW: PVRSRVAllocDeviceMemKM failed with eError = 1
[3669.514 s]4,1217,3669518796,-;test_process invoked oom-killer: gfp_mask=0x6000c0(GFP_KERNEL), nodemask=(null), order=0, oom_score_adj=0
[3669.514 s]6,1218,3669518809,-;test_process cpuset=/ mems_allowed=0
[3669.514 s]4,1219,3669519201,-;CPU: 0 PID: 346 Comm: test_process Tainted: G O 4.19.73 #1
[3669.514 s]4,1220,3669519208,-;Hardware name: Generic DRA74X (Flattened Device Tree)
[3669.514 s]4,1221,3669519215,-;Backtrace:
[3669.514 s]4,1222,3669519231,-;Function entered at [<c020c974>] from [<c020cc9c>]
[3669.514 s]4,1223,3669519241,-; r7:d758bb44 r6:60030013 r5:00000000 r4:c0e45958
[3669.514 s]4,1224,3669519247,-;Function entered at [<c020cc84>] from [<c0834980>]
[3669.514 s]4,1225,3669519253,-;Function entered at [<c08348f0>] from [<c02f3dac>]
[3669.514 s]4,1226,3669519262,-; r7:d758bb44 r6:d7679df4 r5:d758b600 r4:d7679df4
[3669.514 s]4,1227,3669519269,-;Function entered at [<c02f3d34>] from [<c02f3194>]
[3669.514 s]4,1228,3669519280,-; r10:00000000 r9:0000015b r8:c0a8cae0 r7:d758bb44 r6:d7679df4 r5:d758b608
[3669.514 s]4,1229,3669519285,-; r4:d758b600
[3669.514 s]4,1230,3669519290,-;Function entered at [<c02f30cc>] from [<c02f3ac0>]
[3669.514 s]4,1231,3669519300,-; r10:00000000 r9:0000112c r8:c0e04e44 r7:c0e080c0 r6:c0e04c48 r5:d7679df4
[3669.514 s]4,1232,3669519306,-; r4:d758b600
[3669.514 s]4,1233,3669519313,-;Function entered at [<c02f3954>] from [<c02f90fc>]
[3669.514 s]4,1234,3669519321,-; r7:00000002 r6:c0e04c7c r5:00404100 r4:00000000
[3669.514 s]4,1235,3669519328,-;Function entered at [<c02f85e4>] from [<c02f94c8>]
[3669.514 s]4,1236,3669519337,-; r10:02065e48 r9:00000025 r8:d7679f60 r7:d7ebb200 r6:c0e04c48 r5:d758b600
[3669.514 s]4,1237,3669519343,-; r4:bea3de64
[3669.514 s]4,1238,3669519349,-;Function entered at [<c02f94ac>] from [<c03b771c>]
[3669.514 s]4,1239,3669519356,-;Function entered at [<c03b755c>] from [<c03537d0>]
[3669.514 s]4,1240,3669519365,-; r10:00000003 r9:00000000 r8:d7679f60 r7:34dae64e r6:c03b755c r5:d7f4acc0
[3669.514 s]4,1241,3669519371,-; r4:c0e04c48
[3669.514 s]4,1242,3669519378,-;Function entered at [<c0353790>] from [<c0353984>]
[3669.514 s]4,1243,3669519387,-; r9:00000000 r8:00000001 r7:d7679f60 r6:02065e48 r5:d7f4acc0 r4:00000400
[3669.514 s]4,1244,3669519394,-;Function entered at [<c03538f4>] from [<c0353ee0>]
[3669.514 s]4,1245,3669519404,-; r9:00000000 r8:00000000 r7:02065e48 r6:d7f4acc3 r5:c0e04c48 r4:d7f4acc0
[3669.514 s]4,1246,3669519410,-;Function entered at [<c0353e74>] from [<c0353f64>]
[3669.514 s]4,1247,3669519418,-; r9:d7678000 r8:c0201204 r7:00000003 r6:0000002b r5:02065e48 r4:00000400
[3669.514 s]4,1248,3669519425,-;Function entered at [<c0353f54>] from [<c0201000>]
[3669.514 s]4,1249,3669519432,-;Exception stack(0xd7679fa8 to 0xd7679ff0)
[3669.514 s]4,1250,3669519441,-;9fa0: 00000400 02065e48 0000002b 02065e48 00000400 00000000
[3669.514 s]4,1251,3669519452,-;9fc0: 00000400 02065e48 0000002b 00000003 00000002 02065ac8 bea3d2f4 b4f0980c
[3669.515 s]4,1252,3669519461,-;9fe0: 00000000 bea3d000 b2dd94d0 b4c1f1a4
[3669.515 s]4,1253,3669519622,-;Mem-Info:
[3669.515 s]4,1254,3669519643,-;active_anon:48392 inactive_anon:3552 isolated_anon:0\x0a active_file:10973 inactive_file:3258 isolated_file:0\x0a unevictable:0 dirty:16 writeback:0 unstable:0\x0a slab_reclaimable:1389 slab_unreclaimable:3786\x0a mapped:45654 shmem:3559 pagetables:949 bounce:0\x0a free:13805 free_pcp:94 free_cma:12383
[3669.515 s]4,1255,3669519656,-;Node 0 active_anon:193568kB inactive_anon:14208kB active_file:43892kB inactive_file:13032kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:182616kB dirty:64kB writeback:0kB shmem:14236kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
[3669.515 s]4,1256,3669519671,c;DMA free:17316kB min:2016kB low:2520kB high:3024kB active_anon:77820kB inactive_anon:8168kB active_file:92kB inactive_file:68kB unevictable:0kB writepending:0kB present:687104kB managed:437000kB mlocked:0kB kernel_stack:2872kB pagetables:1216kB bounce:0kB free_pcp:260kB local_pcp:252kB free_cma:15480kB
[3669.515 s]4,1257,3669519677,-;lowmem_reserve[]: 0 0 125 125
[3669.515 s]4,1258,3669519714,c;HighMem free:37904kB min:128kB low:380kB high:632kB active_anon:115748kB inactive_anon:6040kB active_file:43812kB inactive_file:12884kB unevictable:0kB writepending:156kB present:259072kB managed:259072kB mlocked:0kB kernel_stack:0kB pagetables:2580kB bounce:0kB free_pcp:116kB local_pcp:100kB free_cma:34052kB
[3669.515 s]4,1259,3669519754,-;lowmem_reserve[]: 0 0 0 0
[3669.515 s]4,1260,3669519784,c;DMA: 658*4kB (UMEC) 365*8kB (UMEC) 184*16kB (UMC) 102*32kB (MC) 61*64kB (C) 11*128kB (C) 2*256kB (C) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 17584kB
[3669.515 s]4,1261,3669519923,c;HighMem: 1791*4kB (UMC) 1291*8kB (UMC) 438*16kB (UMC) 74*32kB (C) 7*64kB (C) 1*128kB (C) 1*256kB (C) 0*512kB 2*1024kB (C) 2*2048kB (C) 1*4096kB (C) = 37940kB
[3669.515 s]4,1262,3669520074,-;17794 total pagecache pages
[3669.515 s]4,1263,3669520080,-;0 pages in swap cache
[3669.515 s]4,1264,3669520088,-;Swap cache stats: add 0, delete 0, find 0/0
[3669.515 s]4,1265,3669520158,-;Free swap = 0kB
[3669.515 s]4,1266,3669520168,-;Total swap = 0kB
[3669.515 s]4,1267,3669520178,-;236544 pages RAM
[3669.515 s]4,1268,3669520185,-;64768 pages HighMem/MovableOnly
[3669.515 s]4,1269,3669520191,-;62526 pages reserved
[3669.515 s]4,1270,3669520199,-;77824 pages cma reserved
[3669.515 s]6,1271,3669520208,-;Tasks state (memory values in pages):
[3669.515 s]6,1272,3669520218,-;[ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name
[3669.515 s]6,1273,3669520281,-;[ 101] 0 101 2930 329 32768 0 -1000 systemd-udevd
[3669.515 s]6,1274,3669520295,-;[ 111] 0 111 13068 4913 118784 0 0 weston
[3669.515 s]6,1275,3669520305,-;[ 133] 0 133 2496 787 40960 0 0 weston-keyboard
[3669.515 s]6,1276,3669520314,-;[ 134] 0 134 3556 1877 53248 0 0 weston-desktop-
[3669.515 s]6,1277,3669520325,-;[ 135] 0 135 1719 957 36864 0 0 superman
[3669.515 s]6,1278,3669520336,-;[ 137] 0 137 7647 1067 53248 0 0 hal
[3669.515 s]6,1279,3669520344,-;[ 140] 0 140 1380 699 28672 0 0 keyman
[3669.515 s]6,1280,3669520353,-;[ 141] 0 141 5670 1102 73728 0 0 mediaservice
[3669.515 s]6,1281,3669520375,-;[ 142] 0 142 6358 1081 73728 0 0 inforbroker
[3669.515 s]6,1282,3669520410,-;[ 143] 0 143 4216 931 36864 0 0 diagman
[3669.515 s]6,1283,3669520421,-;[ 144] 0 144 1706 953 32768 0 0 appman
[3669.515 s]6,1284,3669520431,-;[ 149] 0 149 178696 2000 675840 0 0 apps.out
[3669.515 s]6,1285,3669520440,-;[ 150] 0 150 42577 12144 229376 0 0 mediaplayer
[3669.515 s]6,1286,3669520449,-;[ 151] 0 151 2523 1422 40960 0 0 mediaplayer
[3669.515 s]6,1287,3669520458,-;[ 152] 0 152 2523 1434 36864 0 0 mediaplayer
[3669.515 s]6,1288,3669520467,-;[ 155] 0 155 2523 1422 40960 0 0 mediaplayer
[3669.515 s]6,1289,3669520476,-;[ 156] 0 156 2523 1424 36864 0 0 mediaplayer
[3669.515 s]6,1290,3669520485,-;[ 158] 0 158 61243 8169 393216 0 0 mediaplayer
[3669.515 s]6,1291,3669520493,-;[ 159] 0 159 11884 1874 77824 0 0 mediaplayer
[3669.515 s]6,1292,3669520543,-;[ 162] 0 162 33177 5213 143360 0 0 mediaplayer
[3669.515 s]6,1293,3669520552,-;[ 163] 0 163 2523 1416 40960 0 0 mediaplayer
[3669.515 s]6,1294,3669520563,-;[ 165] 0 165 2523 1416 40960 0 0 mediaplayer
[3669.515 s]6,1295,3669520571,-;[ 211] 0 211 27478 723 237568 0 0 thrive_storm
[3669.516 s]6,1296,3669520584,-;[ 339] 0 339 15930 1335 77824 0 0 avm_controller
[3669.524 s]6,1297,3669520593,-;[ 346] 0 346 178977 60276 970752 0 0 test_process
[3669.524 s]6,1298,3669520604,-;[ 486] 0 486 587 183 28672 0 0 dropbear
[3669.524 s]6,1299,3669520612,-;[ 487] 0 487 1172 306 32768 0 0 login
[3669.524 s]6,1300,3669520625,-;[ 488] 0 488 57375 1248 176128 0 0 cvf_new_app
[3669.524 s]6,1301,3669520670,-;[ 516] 0 516 7820 932 61440 0 0 cvf_controller
[3669.524 s]6,1302,3669520682,-;[ 523] 0 523 1410 719 32768 0 0 installman
[3669.524 s]6,1303,3669520689,-;[ 524] 0 524 28712 1844 118784 0 0 dvr
[3669.524 s]6,1304,3669520700,-;[ 567] 0 567 708 363 28672 0 0 sh
[3669.524 s]6,1305,3669520710,-;[ 11642] 0 11642 590 297 24576 0 0 tail
[3669.524 s]3,1306,3669520720,-;Out of memory: Kill process 346 (test_process) score 347 or sacrifice child
[3669.524 s]3,1307,3669520882,-;Killed process 346 (test_process) total-vm:715908kB, anon-rss:82476kB, file-rss:153224kB, shmem-rss:5404kB
[3669.580 s]6,1308,3669577721,-;oom_reaper: reaped process 346 (test_process), now anon-rss:0kB, file-rss:138388kB, shmem-rss:5404kB
[3669.619 s]connection closed
从日志中，它显示具有 (GFP_KERNEL|GFP_DMA) 模式的 vmalloc 获得 135168 字节大小的内存失败，然后触发 OOM 终止。
但是从“Mem-Info”中，它显示 DMA free 有 17316kB，对于这个 vmalloc 应该有足够的大小。
那么，如果 DMA 区域现在可能没有连续内存呢？或者其他什么可能触发这种杀戮？
非常感谢！
BR/蒂姆