On Tue, 29 Mar 2005 20:18:31 +0200, Pavel Machek <[EMAIL PROTECTED]> wrote: > Hi! > > > If you look at Andy's second trace you will see that we are waiting > > for the disk I/O to get /sbin/hotplug from the disk. Pavel, do you > > know why IO does not complete? khelper is a kernel thread so it is > > marked with > > PF_NOFREEZE. Could it be that we managed to freeze kblockd? > > Uf, no idea about kblockd freezing -- we certainly should not. > > *But*, if we are doing execve while system is frozen, something is > very wrong. We should not be doing execve in the first place.
Well, there lies a problem - some devices have to do execve because they need firmware to operate. Also, again, some buses with hot-pluggable devices will attempt to clean up unsuccessful resume and this will cause hotplug events. The point is you either resume system or you don't. We probably need a separate "unfreeze" callback, although this is kind of messy. -- Dmitry - 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/
