On Mon, 23 Jan 2012, Borzenkov, Andrey wrote: > In case of THP enabled kernel - will THP be used for SysV shmem? > The obvious target is to avoid pre-allocation of huge pages pool > for databases like Oracle that is required today. It will one day, yes. Various people are very interested in THP on tmpfs/shmem, which serves SysV shm. But at present THP is limited to private anonymous pages, and its extension to shared file pages is not trivial. I have not heard of anyone making significant progress on that as yet - but perhaps someone is working on it behind the scenes. Hugh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>