On Fri 01-06-18 13:26:59, Alex Richman wrote: > I am using a shm MAP_SHARED, along these lines: > > shm_fd = shm_open(handle, (O_RDWR | O_CREAT), (S_IRWXU | S_IRWXG | > S_IRWXO)); > > ftruncate(shm_fd, channel->sled_size) > > channel->sled = mmap(NULL, channel->sled_size, (PROT_READ | PROT_WRITE), > > (MAP_SHARED | MAP_NORESERVE), shm_fd, 0); > > mlock(channel->sled, channel->sled_size) /* Fails with ENOMEM. */ > > But shmmax is unlimited on my box: > # sysctl -a | grep shm > kernel.shm_next_id = -1 > kernel.shm_rmid_forced = 0 > kernel.shmall = 18446744073692774399 > kernel.shmmax = 18446744073692774399 > kernel.shmmni = 4096 > > Any ideas? shm_open uses tmpfs/shmem under the cover and that has the internal limit as explained above. -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
