On Mon, 20.12.10 19:16, Fernando Lopez-Lezcano (nando@xxxxxxxxxxxxxxxxxx) wrote: > this isn't exactly correct. > > in /dev/shm on linux we have: > > (a) unix-domain sockets for non-RT communication with the server > (b) FIFOs for RT wakeups (this could use semaphores now) If this uses O_NOATIME it shouldnt matter whether the backing fs is tmpfs or real disk. > (c) shared memory created via either the sysv or posix shm API As mentioned by other people too: sysv shm is not placed in /dev/shm. It lives in an independent non-fs namespace. > we don't care about the unix domain sockets' performance > characteristics, but its convenient to have them in a known location > that happens to be close to where (b) is located. > > we do care about the performance of (b) If O_NOATIME is not the answer to your questions, then you could even pass the fifo fd via the unix socket and have it completely independent of any real fs. Lennart -- Lennart Poettering - Red Hat, Inc. -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
