From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Grover, Andrew" Date: Tue, 13 Nov 2001 19:20:07 +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 The ACPI interpreter starts threads to run control methods, and these are labeled kacpidpc. When nothing is wrong, these are short-lived, and then terminate. Can you please use kdb, break in, and get a stack trace to find out where we're stuck? Thanks -- Regards -- Andy > -----Original Message----- > From: Paris, DavidX [mailto:davidx.paris@intel.com] > Sent: Tuesday, November 13, 2001 9:44 AM > To: 'linux-ia64@linuxia64.org' > Subject: [Linux-ia64] kacpidpc process takes 100% of CPU > > > 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, > > David > > _______________________________________________ > Linux-IA64 mailing list > Linux-IA64@linuxia64.org > http://lists.linuxia64.org/lists/listinfo/linux-ia64 >