Bug 187388 - IT821x drops interrupts freezing system
Summary: IT821x drops interrupts freezing system
Keywords:
Status: CLOSED WORKSFORME
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 5
Hardware: i686
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2006-03-30 17:42 UTC by G.Wolfe Woodbury
Modified: 2007-11-30 22:11 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2006-06-23 08:26:58 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)

Description G.Wolfe Woodbury 2006-03-30 17:42:37 UTC 
Description of problem:
System freezes when DMA is enabled on IT821x driven disks


Version-Release number of selected component (if applicable):
kernel-2.6.16-1.2080_FC5.i686


How reproducible:
quite frequently - nearly every time



Steps to Reproduce:
1.
2.
3.
  
Actual results:
Under anything approaching a reasonable load (such as serving files to windows
clients or NFS clients) the system will freeze completely.
Other causes have been ruled out by eliminating services, and hdparming the DMA
to off completely avoids the problem.

Expected results:
Obviously, I'd expect some reliability in DMA from this driver.

Additional info:
System info: Asus mobo, Celeron (not P4) cpu at 1800MHz, SiS chipset, IT8212 IDE
RAID controller (not in RAID mode)
Comment 1 G.Wolfe Woodbury 2006-06-23 08:26:58 UTC 
Actually, the card was in RAID mode.  Adding the appropriate kernel parameter to
GRUB to force bypass mode avoids the problem.

it821x.noraid=1

(Now I have a memory problem that occasionally locks the system! :-(
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