From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael Meduna" Date: Fri, 12 Sep 2003 01:36:39 +0000 Subject: Re: [Linux-ia64] PATCH redirectable IRQs Message-Id: 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 Erich, I have already reviewed the referenced document. I understand how to set lowest priority delivery mode or fixed delivery mode for a specific IRQ. What I would like to do is set CPU 0 in lowest priority delivery mode for all IRQs but then, have the ability to permanently disable interrupts for specific CPUs. For example: lets say I have a system with 8 host CPUs. I create a processor set that will contain a pool of CPUs (0-3). I create another set of processor sets (4 of them) that will contain processors 4-7. All IRQs are set to CPU 0 in lowest priority delivery mode. I do not want processors 4-7 to take an interrupt. However, I do want interrupts to be spread across processors 0-3. Is there a way to set the XTP register such that processors 4-7 will never take an interrupt?