[DragonFlyBSD - Bug #2346] System stalled with Areca ARC-1880i + MSI

[Francois Tigeot via Redmine]

Issue #2346 has been reported by Francois Tigeot.

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Bug #2346: System stalled with Areca ARC-1880i + MSI
http://bugs.dragonflybsd.org/issues/2346

Author: Francois Tigeot
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 


Using an Areca ARC-1880i with MSI interrupt support on recent versions of DragonFly 3.1 causes disk throughput to slow to a crawl after a while.

Processes attempting to do IO are stuck in various states, including "flstik", "clurd" or "hmrwww".

This issue has been reproduced on two separate machines with the same controller.

Disabling MSI support by setting hw.arcmsr.msi.enable=0 in /boot/loader.conf is enough to make the problem go away.


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