Messages in this thread | | | Date | Wed, 20 Mar 2002 15:20:08 -0700 | From | "Jeff V. Merkey" <> | Subject | Re: Putrid Elevator Behavior 2.4.18/19 |
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On Wed, Mar 20, 2002 at 02:02:41PM -0800, Mike Fedyk wrote: > On Wed, Mar 20, 2002 at 12:04:55PM -0700, Jeff V. Merkey wrote: > > > > > > > > Jens/Linux, > > > > The elevator code is malfunctioning in 2.4.18/19-pre when we start > > reaching the upward limits with multiple 3Ware adapters > > running together. We started seeing the problem when we went to > > 64 K aligned writes with sustained > 200 MB/S writes to > > multiple 3Ware adapters. > > > > We have verified that the 3Ware adapters are not holding the request > > off, but that one of the requests is getting severely starved and > > does not get posted to the 3Ware adapters until thousands of IOs > > have gone before it. > > > > This elevator starvation problem has been identified and a patch already > merged into 2.4.19-pre2. > > Can you verify the affects it produces for your workload?
I will comply. I tested with pre-3 patches and still saw this problem?? Let me go and check the patches I applied to verify, I may not have applied the correct patch.
Jeff
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