On Tue, Jul 17, 2007 at 07:44:07AM +0200, Oliver Neukum wrote: > > If yoi want to go the kexec route to hibernation, the dumping kernel > would need to mount the filesystem to write to a file. Therefore the > suspending kernel would need to sync to disk and lock that file.
If the file is preallocated, that's not a problem, as there's no need to touch filesystem metadata. There'd need to be some channel to pass the disk blocks that are for writing the image, but that's not going to be nearly as complicated as passing the current swap data structures from the previous kernel. There's no reason to have that file open in the original kernel -- it should be root-owned (it's full of privledged data) and probably mode 000. root is free to "dd if=/dev/random of=/dev/mem". Root owned daemons which do bad things are bugs. Again, supporting swap files (*which is not optional*) requires the very same support. -- Joseph Fannin [EMAIL PROTECTED] - 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/
