From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Miller, Mike (OS Dev)" Date: Tue, 15 May 2001 19:00:17 +0000 Subject: [Linux-ia64] System hang 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 Sorry if this not the right forum for this problem. I have encountered a system hang when running heavy I/O. It only occurs when running MP and >4GB RAM. I have seen this under the 2.4.3 and 2.4.4 kernels. Current setup is 2.4.4 with the 010508 ia64 diff patch and kdb applied. The system has 2 C0 processors and 8GB of memory. The test is very simple, just using cpio -p to copy files. It causes a machine check within 5 minutes that locks up the boot strap processor. We've looked at HW and cannot pinpoint a HW failure. This has been reproduced on several different systems including one with B3 processors. After stripping out all the extraneous drivers from the kernel including USB, storage drivers not in use, WAN, etc. the problem has gone away. I am now trying to add drivers back one at a time to isolate the problem w/o any luck so far. Has anyone else observed a similiar hang? The outward symptoms are all I/O stops and the keyboard does not respond. The system must be power cycled. Thanks, mikem