On Fri, Oct 12, 2012 at 12:44:37PM +0800, Dave Young wrote: > On 10/12/2012 03:58 AM, Vivek Goyal wrote: > > > On Thu, Oct 11, 2012 at 10:16:01AM +0200, Harald Hoyer wrote: > >> Hmm, wouldn't that mean, that the generator is seeded with the _same_ seed on > >> every reboot? > >> How is this different from booting with no seed at all? > > > > Atleast it can help with kdump where we might regenerate the initramfs > > upon user config change and capture the new seed. > > > > Also kdump does not happen often on the machine. So I guess for once in > > a while operation it is still better to use random-seed then not using > > anything at all. > > > For normal boot case, I think something like > systemd-random-seed-load.service is fine because rootfs is always > mounted in initramfs. But I'm not sure how to handle the mount issue if > /var/lib if mounted to another partition. > > Or simply add below to pre-pivot hook: > > if [ -f /proc/vmcore ]; then > cat /var/lib/random-seed > /dev/urandom > else > if [ -f /sysroot/var/lib/random-seed ]; then > cat /sysroot/var/lib/random-seed > /dev/urandom > fi > fi > Or how about doing it rhel6 way. Let kdump module pack in /var/lib/random-seed in kdump initramfs and if this file is present, feed it to /dev/urandom. Thanks Vivek -- To unsubscribe from this list: send the line "unsubscribe initramfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
