From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Tue, 13 Nov 2001 17:57:01 +0000 Subject: Re: [Linux-ia64] kacpidpc process takes 100% of CPU 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 >>>>> On Tue, 13 Nov 2001 09:43:52 -0800, "Paris, DavidX" said: >> I've just built 2.4.13 and 2.4.14 with and without the KDB patch >> and in all cases when the system comes up there is a kacpidpc >> process (PID 10) taking 100% of one of the cpus (changes which >> CPU it's on every boot). The system is a 4 processor Lion (733 >> Mhz B3) with 1 gig of ram. This process isn't even running when I >> build the same kernels on a BigSpur. I've even tried copying over >> the very kernel that works fine on the BigSpur, but when I boot >> it on the Lion I get this kacpidpc process. Naturally the process >> ignores my 'kill -9's. I've tried booting the kernel on single >> proc Lions (733 C0s), but the kernel won't even boot on those >> systems (hangs right after it loads the SCSI driver is begins >> looking for devices). Does anyone have any idea why this kacpidpc >> process is hogging one of the CPUs, and how I go about getting >> rid of it? Unlike in the IA32 kernels, it doesn't look like you >> can turn off ACPI in the IA64 kernel. Thanks, What ACPI configuration do you use? In my kernels, I turn on the following ACPI related configs: CONFIG_ACPI=y CONFIG_ACPI_EFI=y CONFIG_ACPI_INTERPRETER=y CONFIG_ACPI_KERNEL_CONFIG=y All other ACPI stuff I turn off. What firmware are you using? In my experience, Lions need build 99 or newer. --david