On Fri, Apr 13, 2007 at 03:46:53PM -0700, Andrew Morton wrote: > > If I want to run a system entirely from ram with a compressed filesystem > > image mounted on /, is it better to store that image in a ramdisk, or on > > a tmpfs and mount it via loopback? > > Store it all in ramfs, no loopback needed?
I used to put everything in a tmpfs on /, and that certainly works. But most files in a typical image are rarely used and it's a pity to have lots of little files taking up a 4k page each. You get pretty big savings by compressing the system into a squashfs and mounting that, so the question becomes: where to put the squashfs? ramdisk or loopback mount it from tmpfs/ramfs? iirc, the problems with loopback have to do with writeout, which isn't a problem here since squashfs is readonly. Jason - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
