Hi, I'm debugging a memory leak in an internal driver. There is ~2G leak after stress tests. If I read below /proc/meminfo correctly, it doesn't show where the 2G memory is possibly used. Buffers + Cached + Active*/Inactive* + Slab* only about 300M. Is there other statistics not shown in /proc/meminfo or am I missing obvious things? root@target:~# uname -r 4.5.0+ root@target:~# echo 3 > /proc/sys/vm/drop_caches root@target:~# free total used free shared buffers cached Mem: 3787612 2182128 1605484 1072 1036 24240 -/+ buffers/cache: 2156852 1630760 Swap: 15624188 6812 15617376 root@target:~# cat /proc/meminfo MemTotal: 3787612 kB MemFree: 1604336 kB MemAvailable: 1598460 kB Buffers: 1928 kB Cached: 24668 kB SwapCached: 1344 kB Active: 27520 kB Inactive: 14184 kB Active(anon): 12504 kB Inactive(anon): 3752 kB Active(file): 15016 kB Inactive(file): 10432 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 15624188 kB SwapFree: 15617376 kB Dirty: 36 kB Writeback: 0 kB AnonPages: 14656 kB Mapped: 23328 kB Shmem: 1072 kB Slab: 94092 kB SReclaimable: 12324 kB SUnreclaim: 81768 kB KernelStack: 3344 kB PageTables: 2936 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 17517992 kB Committed_AS: 155592 kB VmallocTotal: 34359738367 kB VmallocUsed: 0 kB VmallocChunk: 0 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB CmaTotal: 0 kB CmaFree: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 205648 kB DirectMap2M: 3872768 kB root@target:~# page-types flags page-count MB symbolic-flags long-symbolic-flags 0x0000000000000000 1007923 3937 _________________________________________ 0x0000000001000000 1 0 ________________________z________________ zero_page 0x0000000000100000 131072 512 ____________________n____________________ nopage 0x0000000000000008 1 0 ___U_____________________________________ uptodate 0x0000000000000020 32 0 _____l___________________________________ lru 0x0000000000000024 14 0 __R__l___________________________________ referenced,lru 0x0000000000000028 142 0 ___U_l___________________________________ uptodate,lru 0x0000000000004028 102 0 ___U_l________b__________________________ uptodate,lru,swapbacked 0x000000000000002c 39 0 __RU_l___________________________________ referenced,uptodate,lru 0x0000000000000040 15 0 ______A__________________________________ active 0x0000000000000060 450 1 _____lA__________________________________ lru,active 0x0000000000000064 80 0 __R__lA__________________________________ referenced,lru,active 0x0000000000000068 21 0 ___U_lA__________________________________ uptodate,lru,active 0x000000000000006c 52 0 __RU_lA__________________________________ referenced,uptodate,lru,active 0x0000000000000080 10471 40 _______S_________________________________ slab 0x0000000000006228 28 0 ___U_l___I___sb__________________________ uptodate,lru,reclaim,swapcache,swapbacked 0x0000000000000228 6 0 ___U_l___I_______________________________ uptodate,lru,reclaim 0x0000000000004238 162 0 ___UDl___I____b__________________________ uptodate,dirty,lru,reclaim,swapbacked 0x0000000000004278 2 0 ___UDlA__I____b__________________________ uptodate,dirty,lru,active,reclaim,swapbacked 0x0000000000000800 1 0 ___________M_____________________________ mmap 0x0000000000000804 1 0 __R________M_____________________________ referenced,mmap 0x0000000000000808 4 0 ___U_______M_____________________________ uptodate,mmap 0x0000000000000828 1871 7 ___U_l_____M_____________________________ uptodate,lru,mmap 0x000000000000082c 668 2 __RU_l_____M_____________________________ referenced,uptodate,lru,mmap 0x0000000000004838 2 0 ___UDl_____M__b__________________________ uptodate,dirty,lru,mmap,swapbacked 0x0000000000000868 607 2 ___U_lA____M_____________________________ uptodate,lru,active,mmap 0x000000000000086c 2754 10 __RU_lA____M_____________________________ referenced,uptodate,lru,active,mmap 0x0000000000000c00 12532 48 __________BM_____________________________ buddy,mmap 0x0000000000007028 105 0 ___U_l______asb__________________________ uptodate,lru,anonymous,swapcache,swapbacked 0x0000000000005048 8 0 ___U__A_____a_b__________________________ uptodate,active,anonymous,swapbacked 0x0000000000007068 7 0 ___U_lA_____asb__________________________ uptodate,lru,active,anonymous,swapcache,swapbacked 0x0000000000007228 6 0 ___U_l___I__asb__________________________ uptodate,lru,reclaim,anonymous,swapcache,swapbacked 0x0000000000007828 146 0 ___U_l_____Masb__________________________ uptodate,lru,mmap,anonymous,swapcache,swapbacked 0x0000000000005838 380 1 ___UDl_____Ma_b__________________________ uptodate,dirty,lru,mmap,anonymous,swapbacked 0x0000000000005848 6 0 ___U__A____Ma_b__________________________ uptodate,active,mmap,anonymous,swapbacked 0x0000000000005868 3084 12 ___U_lA____Ma_b__________________________ uptodate,lru,active,mmap,anonymous,swapbacked 0x0000000000007868 10 0 ___U_lA____Masb__________________________ uptodate,lru,active,mmap,anonymous,swapcache,swapbacked 0x000000000000586c 7 0 __RU_lA____Ma_b__________________________ referenced,uptodate,lru,active,mmap,anonymous,swapbacked 0x000000000000786c 26 0 __RU_lA____Masb__________________________ referenced,uptodate,lru,active,mmap,anonymous,swapcache,swapbacked 0x0000000000005878 126 0 ___UDlA____Ma_b__________________________ uptodate,dirty,lru,active,mmap,anonymous,swapbacked 0x000000000000787c 1 0 __RUDlA____Masb__________________________ referenced,uptodate,dirty,lru,active,mmap,anonymous,swapcache,swapbacked 0x0000000000007a28 9 0 ___U_l___I_Masb__________________________ uptodate,lru,reclaim,mmap,anonymous,swapcache,swapbacked 0x0000000000005a38 8 0 ___UDl___I_Ma_b__________________________ uptodate,dirty,lru,reclaim,mmap,anonymous,swapbacked 0x0000000000007a68 1 0 ___U_lA__I_Masb__________________________ uptodate,lru,active,reclaim,mmap,anonymous,swapcache,swapbacked 0x0000000000005a78 9 0 ___UDlA__I_Ma_b__________________________ uptodate,dirty,lru,active,reclaim,mmap,anonymous,swapbacked total 1172992 4582 root@target:~# -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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