RE: [Linux-ia64] Basic Advice Needed

From: Van Maren, Kevin <>
Date: 2002-04-03 01:14:10
> As someone pointed out, the network and SCSI adapters may be causing
> problems. It has an Adaptec Ultra160 dual channel SCSI card for
> example, which definitely seems nonstandard.

Yes, that card works well -- if you have the right driver.

Use the latest Adaptec driver from Justin Gibbs.  There was a bug in the
early 39-bit DMA support that caused the kernel to crash periodically
[if the address just happened to overlab the swiotlb in the low 32 bits].

He incorporated my fix in Change 420:

If you want to see if that affects you, look at the call to
if the second parameter is:
you have the broken version.  Note that the 2.4.9 kernel has the broken
and IA64 kernels before that didn't support 39-bit DMA (which leads to
under load, unless you greatly increase swiotlb size).  Not sure what
is in the newer IA64 kernels.

Received on Tue Apr 02 07:14:39 2002

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