On 12/15/2011 05:01 PM, Alan Stern wrote:
Is there anything special you do to get into this kind of situation?
Like 16GiB of memory on 32bit with highmem and a brutal disk/io test
case so?
As I understand it, the typical case is that two SG entries in a row
refer to adjacent pages of physical memory. The mapping routine then
collapses them into a single entry referring to all the pages.
However, this is not the sort of thing you can deliberately cause,
unless you set up your SG list by hand.
Thanks, both of you for the explanation.
Alan Stern
Sebastian
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