From: Andi Kleen <ak@suse.de>
To: discuss@x86-64.org
Subject: Re: [discuss] Re: x86_64: 2.6.14-rc4 swiotlb broken
Date: Thu, 20 Oct 2005 09:27:48 +0200
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Cc: Jon Mason <jdmason@us.ibm.com>, Muli Ben-Yehuda <mulix@mulix.org>,
       Ravikiran G Thirumalai <kiran@scalex86.org>,
       Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
       linux-kernel@vger.kernel.org, tglx@linutronix.de, shai@scalex86.org,
       clameter@engr.sgi.com, muli@il.ibm.com
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On Wednesday 19 October 2005 19:18, Jon Mason wrote:
> I have run a few tests on the original code and the patches posted to the
> list, and have some interesting results.  First, my system setup:  Dual
> Opteron, 8GB RAM, SIL SATA controller (which is apparently 32bit), pcnet32
> NIC (compiled as a module) connected to the network.  The latter 2 should
> show any bounce buffer problems.

We don't care about AMD systems for this problem because they
don't use swiotlb in normal operations, but the AGP remapping hardware (except 
on one particulr chipset, but people don't build servers from that) 

If anything then testing results from Summit3 based Intel x86 NUMA systems 
would be interesting.

-Andi
 
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