Dear Stan, I can't send email to you.So I leave a message here.I hope not to bother you. Thank you for your kind assistance. In accordance with your suggestion, we executed "echo 3 > /proc/sysm/drop_caches" for trying to release vfs dentries and inodes. Really, our lost memory came back. But we learned that the memory of vfs dentries and inodes is distributed from slab. Please check our system "Slab: 509708 kB" from /proc/meminfo, and it seems only be took up 500MB and xfs_buf take up 450MB among. And /proc/meminfo indicated that our system memory is anomalous, there is about 10GB out of the statistics. We want to know how the system could observe the usage amount of vfs dentries and iodes through the system interface. If the memory usage of system is not reflected in /proc/meminfo as we can not find the statistics, and we thought it as a bug of xfs. My vm.vfs_cache_pressure of linux system is 100. We think that the system will proactively take the memory back when the memory is not enough, rather than oom-killer kills our work process. Our datas of /proc/meminfo occurred during the system problem as below: 130> cat /proc/meminfo MemTotal: 12173268 kB MemFree: 223044 kB Buffers: 244 kB Cached: 4540 kB SwapCached: 0 kB Active: 1700 kB Inactive: 5312 kB Active(anon): 1616 kB Inactive(anon): 1128 kB Active(file): 84 kB Inactive(file): 4184 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 2556 kB Mapped: 1088 kB Shmem: 196 kB Slab: 509708 kB SReclaimable: 7596 kB SUnreclaim: 502112 kB KernelStack: 1096 kB PageTables: 748 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 6086632 kB Committed_AS: 9440 kB VmallocTotal: 34359738367 kB VmallocUsed: 303488 kB VmallocChunk: 34359426132 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 6152 kB DirectMap2M: 2070528 kB DirectMap1G: 10485760 kB Best Regards, Guochao -- View this message in context: http://xfs.9218.n7.nabble.com/10GB-memorys-occupied-by-XFS-tp35015p35016.html Sent from the Xfs - General mailing list archive at Nabble.com. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
