On Sat, 6 Jan 2007 22:08:51 +0530 Srivatsa Vaddagiri <[EMAIL PROTECTED]> wrote:
> This workqueue problem has exposed a classic example of how > tough/miserable it can be to write hotplug safe code w/o something like > lock_cpu_hotplug() ..Are you still inclined towards banning it? :) I don't ban stuff - I just advocate ;) I would still prefer that we not try to invent a new magical lock, but yes, the current approach is looking troublesome. > FYI, the lock_cpu_hotplug() rewrite proposed by Gautham at > http://lkml.org/lkml/2006/10/26/65 may still need refinement to avoid > all the kind of deadlocks we have unearthed with workqueue example. I > can review that design with Gautham if there is some interest to > revive lock_cpu_hotplug() .. Has anyone thought seriously about using the process freezer in the cpu-down/cpu-up paths? That way we don't need to lock anything anywhere? - 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/
