As I read from http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/filesystems/proc.txt?id=HEAD#l451 (line 906)
the Shmem field in /proc/meminfo: Total memory used by shared memory (shmem) and tmpfs
tmpfs size:
/proc # df -Thk |grep -E "tmpfs|Used"
Filesystem Type 1K-blocks Used Available Use% Mounted on
devtmpfs devtmpfs 1963344 8 1963336 1% /dev
tmpfs tmpfs 2027904 728 2027176 1% /dev/shm
tmpfs tmpfs 2027904 9936 2017968 1% /run
tmpfs tmpfs 2027904 0 2027904 0% /sys/fs/cgroup
total (tmpfs) size: 8+ 728 + 9936 = 10672 kB
shared mem by ipc
/proc # ipcs -mu
------ Shared Memory Status --------
segments allocated 23
pages allocated 1855
pages resident 1855
pages swapped 0
Swap performance: 0 attempts 0 successes
/proc # getconf PAGESIZE
4096
-->ipcs shared mem = 1855 * 4096/1024 = 7420kB
> 7420kB (ipcs mem) + 10672 (tmpfs) = 18092 Kb
**
/proc # cat /proc/meminfo |grep Shmem
Shmem: 18096 kB
which is different from Shmem in meminfo 4Kb could you help me about "where is 4Kb located?"
Thank you so much
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