Red Hat Bugzilla – Bug 59165
DS20 with more than 2GB of memory crashes during install
Last modified: 2005-10-31 17:00:50 EST
Description of Problem:
On a DS20E with more than 2GB of memory and SCSI controller on PCI bus #0,
the install crashes.
Version-Release number of selected component (if applicable): alpha-7.2-beta1
Always, but not exactly the same symptoms.
Steps to Reproduce:
1. DS20 or DS20E with more than 2GB of memory
2. SCSI controller (doesn't matter what kind) on PCI bus #0
3. full ("Everything") install
During the install, the kernel will crash with various symptoms, sometimes
a panic, sometimes just a complete hung machine.
Flawless install, of course... :-)
The bug is caused by a flawed workaround for a CYPRESS chipset limitation.
The workaround attempts to adjust a resource if it finds more than 2GB of
memory, and incorrectly calculates the adjustment.
I will attach a bugfix for this problem. (JAE)
Created attachment 44217 [details]
patch for arch/alpha/kernel/pci.c to fix quirk_cypress() bug
Does this happen on a DS20E with exactly 2GB memory? That's what our system
With a 2.4.9 kernel, this will not happen with exactly 2GB of memory - more
than 2GB is required to encounter this bug (DS20 / DS20E support up to 4GB of
The patch has been added to the kernel for the upcoming release.
I'm closing this bug because it was fixed in the Feb 22 release.