From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Christopher S. Aker" <caker@theshore.net>
Subject: Re: SWIOTLB allocation failed
Date: Tue, 04 Dec 2007 09:53:53 -0500
Message-ID: <47556A01.6000503@theshore.net>
References: <20071127135301.GI4296@ics.muni.cz>	<6bc632150711270603k1c22533dof7574acb0fb83b8f@mail.gmail.com>
	<20071204142643.GC8704@ics.muni.cz>
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To: Lukas Hejtmanek <xhejtman@ics.muni.cz>
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Lukas Hejtmanek wrote:
> On Tue, Nov 27, 2007 at 07:33:40PM +0530, pradeep singh rautela wrote:
>> Did you try using swiotlb=XYZ to solve your problem? XYZ is the amount
>> of the memory for swiotlb.
>> Did you get the same crash?
> 
> I noticed that using swiotlb=30000000 probably does not work at all as I got
> the following:

That would attempt to assign 30 million 128k pages, or roughly 3.5 TB of 
memory towards the bounce buffer.  I don't think you want that.

swiotlb defaults to 32 or 64 (I forget) -- try bumping it to 128 or 256.

-Chris