From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jes Sorensen Date: Mon, 19 May 2008 12:25:51 +0000 Subject: Re: ld2.acq - sign extension? Message-Id: <483171CF.5060701@sgi.com> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org Matthew Chapman wrote: > Jes, > > You mentioned that you're running on KVM... while I don't know much > about how KVM works, is that load instruction being intercepted and > emulated by any chance? (Considering that it looks like something that > would be accessing hardware registers on a real machine.) A bug in that > emulation could explain why it's behaving strangely... Hi Matt, That has to be the reason - I was sitting here being convinced it wasn't emulated because it's not a priviledged instruction, but obviously it is given it's accessing the emulated registers. Next I need to figure out how thats handled, whether it's a KVM bug a hypervisor bug ..... all this fun we are having. Cheers, Jes