On Thu, Feb 21, 2008 at 11:40:06AM +1100, Nigel Cunningham wrote:Hi.
Matthew Garrett wrote:On Thu, Feb 21, 2008 at 09:45:02AM +1100, Nigel Cunningham wrote:Putting drivers and filesystems in userspace is the fundamentally broken concept. Not just when it comes to the freezer. The whole idea is inherently racy.- people keep talking about hibernating to an ext3 fs mounted on fuse as a limitation of the freezer. To do that with kexec, you're still going to have to bmap the ext3 fs and pass the block list (in which case we can also do it without kexec) or umount all the ext3/fuse part and remount in the kexec'd kernel. Sort of defeats the purpose, doesn't it?No, with a freezer-based model you can basically *never* suspend to anything related to FUSE or a userspace USB device or anything involving userspace iSCSI initiators or whatever. Sure, there are cases where moving away from the current model doesn't buy you anything, but that doesn't mean that the current model is a good thing. It's not. The freezer is a fundamentally broken concept.
Racy with regards to other things becides trying to suspend a machine?
If so, what?