[Bug 494476] Re: "Smbd", "kjournald2" and "rsync" blocked for more than 120 seconds while using ext4.

[Lars]

Hi,

seems I have the same problem with a mbuffer process reading from a Soft-RAID6 from 24 SATA drives with XFS on it.
It's our backup system that writes everything (5.9TB) to tapes.

In the end the mbuffer stops with this error:

mbuffer: warning: error during output to /dev/st0: Input/output error

It seems to me the scheduler is the root of the problem.

I'd like to test with upstream kernels but there are no server kernels. I'm running ubuntu 10.04 LTS amd64 server.
Which kernel should I choose?

Lars

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"Smbd","kjournald2" and  "rsync"  blocked for more than 120 seconds while using ext4.
https://bugs.launchpad.net/bugs/494476
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