From mboxrd@z Thu Jan 1 00:00:00 1970 From: Doug Ledford Subject: 2.5.43 IO-APIC bug and spinlock deadlock Date: Wed, 16 Oct 2002 23:33:02 -0400 Sender: linux-kernel-owner@vger.kernel.org Message-ID: <20021017033302.GP8159@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , linux-scsi@vger.kernel.org List-Id: linux-scsi@vger.kernel.org IO-APIC bug: regular kernel, UP, no IO-APIC or APIC on UP enabled, compile fails (does *everyone* run SMP or at least UP + APIC now?) spinlock deadlock: run an smp kernel on a up machine. On mine here all I have to do is try to boot to multiuser mode, it won't make it through the startup scripts before it locks up by trying to reenter common_interrupt on the only CPU. Seems like an SMP kernel on UP hardware doesn't disable interrupts properly maybe? I get task lists via alt-sysreq when the machine should be hardlocked I think. Anyway, this is what has been tricking me into thinking I had an IDE problem. IDE is innocent, it's the core interrupt handling code. Back to work on scsi stuff now that I have a decently running 2.5.43 system, I'll let someone else deal with these. -- Doug Ledford 919-754-3700 x44233 Red Hat, Inc. 1801 Varsity Dr. Raleigh, NC 27606