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[Xen-users] Re: calculating the needed swiotlb in dom0

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Re: calculating the needed swiotlb in dom0
From: "Christopher Isip" <cmisip@xxxxxxxxx>
Date: Wed, 28 May 2008 08:30:54 -0400
Delivery-date: Wed, 28 May 2008 05:31:44 -0700
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I just found out that setting swiotlb=128 in dom0 grub.conf allowed me to run my mythtv domU with additonal options to ivtv:
in /etc/modprobe.d/options
options ivtv enc_mpg_buffers=8

Setting this to any higher value causes a kernel panic.   I want to be able to specify
options ivtv enc_mpg_buffers=16 enc_vbi_buffers=8

How much swiotlb do I need? Is there a way to figure this out or is it just trial and error.

Thanks
Chris

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