On Fri 01-06-18 10:53:57, Alex Richman wrote: > Hi, > > I'm seeing a 1/2 of system RAM limit when calling mlock(). mlock(2) says: > > ENOMEM (Linux 2.4 and earlier) the calling process tried to lock more than > half of RAM. > Which implies to me that the 1 half of system RAM limit should be only Linux > 2.4 and earlier, but I'm running linux 4.4.127 and still seeing the limit. > > This is on a system with 66007168 KB total memory, locking 33794621440 bytes > works, locking 33795653632 bytes does not work. I assume you are doing mlock on MAP_SHARED resp. on mmap of shmem file. You are likely to hit the shmem limit. This is half of the available memory by default. -- 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
