Re: [Linux-ia64] RE: +AFs-Linux-ia64+AF0- reader-writer livelock proble

From: Grant Grundler (
Date: Mon Nov 11 2002 - 17:02:32 EST

"Van Maren, Kevin" wrote:
> It is also possible that a processor can get stuck +ACI-forever+ACI-
> spinning in the kernel with interrupts disabled trying to
> acquire a lock, and never succeed, without the rest of the
> kernel going south. If that happens, and application will
> be livelocked, but the rest of the system will function.

Probably not. ia64 systems (and x86 systems with IO xapic) direct
IO interrupts to specific CPUs. Devices would not get serviced
in the above case and IO to/from those devices would come to a
grinding halt. It would look more like "dead" lock than "live" lock.

> It really depends on the particular circumstances.

yes. But it sounds very likely to me.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Fri Nov 15 2002 - 22:00:23 EST