On Fri, Aug 25 2006, Andi Kleen wrote:

On Friday 25 August 2006 14:26, Jens Axboe wrote:

quoted

On Fri, Aug 25 2006, Andi Kleen wrote:

quoted

quoted

Does deadline do better?

It's not really repeatable workload. It's just my workstation which
got into this unpleasant state while me trying to get work done.

I can change it to deadline and see if I see this still again, but it might
take some time.

Yeah, a test case might be simpler to write and test with. I'll see if I
can come up with something.

So you think it's the elevator? I was about to blame JBD.

Not sure, it might be ext3. Hence the deadline test would be useful. All
I know for sure is that the io scheduling for fsync() can be improved.
Did you try data=writeback?

-- 
Jens Axboe

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