Bug 187388 – IT821x drops interrupts freezing system

Bug 187388 - IT821x drops interrupts freezing system

Summary:	IT821x drops interrupts freezing system

Status:	CLOSED WORKSFORME

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	kernel (Show other bugs)
Sub Component:
Version:	5
Hardware:	i686 Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Kernel Maintainer List
QA Contact:	Brian Brock
Docs Contact:

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Blocks:
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Reported:	2006-03-30 12:42 EST by G.Wolfe Woodbury
Modified:	2007-11-30 17:11 EST (History)
CC List:	1 user (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed:	2006-06-23 04:26:58 EDT
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Regression:	---
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RHEL 7.3 requirements from Atomic Host:
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Description G.Wolfe Woodbury 2006-03-30 12:42:37 EST

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 04:26:58 EDT

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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