On Sat, Nov 19, 2011 at 03:14:48PM +0100, Kay Sievers wrote: > On Sat, Nov 19, 2011 at 11:03, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > On Fri, Nov 18, 2011 at 06:39:50PM +0800, Cong Wang wrote: > >> It seems that systemd needs tmpfs to support fallocate, > >> see http://lkml.org/lkml/2011/10/20/275. This patch adds > >> fallocate support to tmpfs. > > > > What for exactly? ??Please explain why preallocating on tmpfs would > > make any sense. > > To be able to safely use mmap(), regarding SIGBUS, on files on the > /dev/shm filesystem. The glibc fallback loop for -ENOSYS on fallocate > is just ugly. That is the kind of information which needs to be in the changelog. -- 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>