I have an amd64 4.7.1 system (upstream kernel, pretty regular config) with a small file system: Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 922595184 800396464 122198720 87% / Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sda1 504110496 15305094 488805402 4% / The odd thing is that after a while, XFS consumes a lot of memory according to slabtop: OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME 4121208 4121177 99% 0.88K 1030302 4 4121208K xfs_inode 986286 985229 99% 0.19K 46966 21 187864K dentry 723255 723076 99% 0.10K 18545 39 74180K buffer_head 270263 269251 99% 0.56K 38609 7 154436K radix_tree_node 140310 67409 48% 0.38K 14031 10 56124K mnt_cache (I have attached the /proc/meminfo contents in case it offers further clues.) Confronted with large memory allocations (from “make -j12” and compiling GCC, so perhaps ~8 GiB of memory), the OOM killer kicks in and kills some random process. I would have expected that some xfs_inodes are freed instead. I don't think this is an ordinary memory leak. The last time I saw something like the slabtop output above, I could do “sysctl vm.drop_caches = 3”, and the amount of memory allocated reported by slabtop was reduced considerably. (I have not checked if the memory was actually returned to the system.) I have not done this now so that I can gather further data for debugging. I am not sure what triggers this huge allocation. It could be related to my Gnus mail spool (which contains lots and lots of small files). MemTotal: 12300808 kB MemFree: 1744132 kB MemAvailable: 10325076 kB Buffers: 0 kB Cached: 4726892 kB SwapCached: 32 kB Active: 3094868 kB Inactive: 2307968 kB Active(anon): 303736 kB Inactive(anon): 738188 kB Active(file): 2791132 kB Inactive(file): 1569780 kB Unevictable: 32 kB Mlocked: 32 kB SwapTotal: 14645244 kB SwapFree: 14644796 kB Dirty: 28 kB Writeback: 0 kB AnonPages: 676016 kB Mapped: 290956 kB Shmem: 365980 kB Slab: 4646696 kB SReclaimable: 4542188 kB SUnreclaim: 104508 kB KernelStack: 8112 kB PageTables: 18148 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 20795648 kB Committed_AS: 4926352 kB VmallocTotal: 34359738367 kB VmallocUsed: 0 kB VmallocChunk: 0 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 609792 kB DirectMap2M: 11964416 kB DirectMap1G: 2097152 kB _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
