[OpenIndiana-discuss] io_151 kernel lock up

[Achim Wolpers]

Hi!

I encounter the following problem, which I can reproduce. But I have no clue, why this happens:

System:
uname -a
SunOS frodo 5.11 oi_151a i86pc i386 i86pc Solaris

Hardware:
Dell PE T710, 8GB RAM

When the box is getting low on memory and it starts to page out, it usually locks up without any log entries. It just freezes. Only a hard reboot gets it back running. Even though I have no problems with the mass storage, I read that this kind of problem might occur in conjunction with the controller and driver of the HDDs. The DELL PE T7100 has a SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] and I have the mpt_sas driver installed that seems to ship with OpenIndiana. The swap accessed through this controller.

Further more I ran vmstat the other day which produced the following output (I made a screenshot with my camera ;-))

http://www.flickr.com/photos/71479913@N03/6461877513/

The last line shows a huge number of faults but I am not able to interpret that.

Does anyone have a hint how to gat rid of this problem?

Achim