From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erich Focht Date: Wed, 16 May 2001 16:55:20 +0000 Subject: [Linux-ia64] hanging process cannot be killed Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org Hello, how can it happen that a process isn't killable with kill -9 any more? I have encountered this a few times and from within kdb two processes seem to be in "run" state on the same CPU! The one marked as "current" shows the following traceback: __ia64_save_fpu+0x20 schedule+0xa40 invoke_schedule+0x20 ia64_leave_kernel+0x30 This process sits on the CPU, eats up cycles and the scheduler doesn't seem to touch it any more. I only can get rid of it by rebooting. Another traceback of a similar situation (with the same executable) was: __ia64_save_fpu+0x280 schedule+0xa40 ia64_do_signal+0x670 handle_signal_delivery+0x30 ia64_leave_kernel+0x30 I've seen this with 2.4.0 and 2.4.4 kernels, with B1 stepping CPUs. With 2.4.4 in single dispersal mode the problem doesn't seem to occur... Thanks in advance for any help, ideas, comments... Best regards, Erich --- Erich Focht NEC European Supercomputer Systems, European HPC Technology Center Hessbruehlstr. 21B, 70565 Stuttgart, Germany phone: +49-711-78055-15 fax : +49-711-78055-25