Use tmpfs for rootfs when CONFIG_TMPFS=y and there's no root=. Specify rootfstype=ramfs to get the old initramfs behavior. The previous initramfs code provided a fairly crappy root filesystem: didn't let you --bind mount directories out of it, reported zero size/usage so it didn't show up in "df" and couldn't run things like rpm that query available space before proceeding, would fill up all available memory and panic the system if you wrote too much to it... Using tmpfs instead provides a much better root filesystem. Changes from v1: use test_and_set_bit() for "once" logic. Changes from this morning's send: none, just hopefully not screwing up the message-id this time trying to make it a reply to another message via cut and paste... -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>