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List:       linuxppc64-dev
Subject:    2.6.9 iommu_alloc failures on PPC64
From:       pbadari () us ! ibm ! com (Badari Pulavarty)
Date:       2004-10-27 15:31:34
Message-ID: 1098891094.20643.134.camel () dyn318077bld ! beaverton ! ibm ! com
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Ben,

SLES9 seems to work fine, which has qlogic driver version 8.00.00b14
2.6.9 with qlogic driver version 8.00.00b15-k is having problems.

FYI.

Thanks,
Badari

On Tue, 2004-10-26 at 17:05, Benjamin Herrenschmidt wrote:
> On Tue, 2004-10-26 at 16:33 -0700, Badari Pulavarty wrote:
> > Hi,
> > 
> > When I run IO tests with 2.6.9 kernel on PPC64, I get hundreds of
> > following messages and eventually get OOPS from qlogic driver.
> > Is this a known problems ?
> > 
> > BTW, this happens only with JFS not ext3. 
> 
> I suppose JFS is flooding the driver with so many large requests that
> the small table on your machine gets full (what machine is this
> precisely ?).
> 
> The qlogic driver should be fixed to handle iommu failures more
> gracefully. It should be possible in most cases to just wait for pending
> IOs to complete & try again. I don't know if it's possible to ask the
> upper layer to breakup the request.
> 
> Ben.
> 
> 
> 



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