4329 1999-08-03 07:39:51 +0000 Newer Ultra/AXi systems w/NCR scsi severely unstable. 2008-05-01 15:37:51 +0000 1 1 8 Retired Red Hat Linux kernel 6.0 sparc Linux CLOSED CURRENTRELEASE medium high --- 1 davem davem jbj msw Bug Fix --- 1999-08-13 23:17:21 --- --- --- --- --- --- --- --- oldest_to_newest 571409 0 davem 1999-08-03 07:39:51 +0000 UltraSparc AXi systems produced with APB PCI bridge revision 13 or greater cannot withstain any amount of heavy disk activity on NCR scsi controller. The problem has to do with PCI write posting semantics of the APB bridge chipset, which were dampened by some retry semantic differences in the older chips so we never saw it on older AXi machines. Gerard Roudier has some attempts to work around this problem, and after testing and verifications this fix if working will go into the upcoming kernel updates. Worst part about this bug is that a machine will successfully fully install, then be unusable on first boot, therefore it will be triky to distribute a "fix" since people afflicted by the problem cannot even get the machine up far enough to install an RPM update. Suggestions are welcome on this latter issue. 571410 1 davem 1999-08-13 23:17:59 +0000 I've fixed this kernel bug, it will be in our kernel updates coming up.