> There was a post recently (that now I can't find), that said the shm
> management was done with an interal fs. Was that Posix or sysv shm ?
SYSV shm and shared anonymous mappings are using a kern_mount of
shm/tmpfs. So the CONFIG_TMPFS does only make the
directory/read/write-handling conditional. The rest is unconditionally
compiled into the kernel.
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