linux-kernel - RE: [BUG] 2.6.23-rc3-mm1 Kernel panic - not syncing: DMA: Memory would be corrupted

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Date:	Wed, 22 Aug 2007 16:27:09 -0700
From:	"Luck, Tony" <tony.luck@...el.com>
To:	"Jeremy Higdon" <jeremy@....com>
Cc:	"Kamalesh Babulal" <kamalesh@...ux.vnet.ibm.com>,
	"Andi Kleen" <ak@...e.de>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	<linux-kernel@...r.kernel.org>,
	"Balbir Singh" <balbir@...ux.vnet.ibm.com>,
	<linux-ia64@...r.kernel.org>
Subject: RE: [BUG] 2.6.23-rc3-mm1 Kernel panic - not syncing: DMA: Memory would be corrupted

> The more ioc's you have, the more space you will use.

Default SW IOTLB allocation is 64MB ... how much should we see
used per ioc?

Kamelesh: You could try increasing the amount of sw iotlb space
available by booting with a swiotlb=131072 argument (argument
value is the number of 2K slabs to allocate ... 131072 would
give you four times as much space as the default allocation).

-Tony
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