From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6 Description of problem: Note: The fix already exists in the upstream kernel (2.6.17) and the i386 version of the RHEL4 U4 kernel (2.6.9-40.EL) When using the boot parameter acpi=noirq, the kernel hangs (aka does not panic) in smp_read_mpc when trying to read the ES7000 MPConfig table (which has been moved higher in memory by an new firmware release). Version-Release number of selected component (if applicable): kernel-2.6.9-40 How reproducible: Always Steps to Reproduce: 1. Load new ES7000 BIOS (not released yet) 2. Boot the ES7000 with the boot parameter acpi=noirq 3. Machine hangs Actual Results: Machine Hangs Expected Results: The machine should have booted. Additional info: This patch changes the code to pass a virtual address to smp_read_mpc instead of a physical address. This code has been copied directly from the i386 branch and works. Excuse any spacing issues in this patch, I am writing this bug on windDOwS. --- --- linux-2.6.9-40.orig/arch/x86_64/kernel/mpparse.c 2006-08-02 11:07:23.000000000 -0400 +++ linux-2.6.9-40.fixed/arch/x86_64/kernel/mpparse.c 2006-08-02 11:49:17.000000000 -0400 @@ -563,7 +563,7 @@ * Read the physical hardware table. Anything here will * override the defaults. */ - if (!smp_read_mpc((void *)(unsigned long)mpf->mpf_physptr)) { + if (!smp_read_mpc((void *)phys_to_virt(mpf->mpf_physptr))) { smp_found_config = 0; printk(KERN_ERR "BIOS bug, MP table errors detected!...\n"); printk(KERN_ERR "... disabling SMP support. (tell your hw vendor)\n");
committed in stream U5 build 42.6. A test kernel with this patch is available from http://people.redhat.com/~jbaron/rhel4/
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
QE ack for 4.5.
User jparadis's account has been closed
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2007-0304.html