[Xen-devel] Large struct reference in Hypercall

To:	xen-devel@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-devel] Large struct reference in Hypercall
From:	Tej <bewith.tej@xxxxxxxxx>
Date:	Tue, 20 Jan 2009 21:04:50 +0530
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Hey all

I am trying a simple hypercall between dom0 and Xen hypervisor
(__hypercall2). I am passing arg to hypercall as pointer to a
strucutre.
As i increase the size of struct more then some fixed value say
16000bytes then machine reboots at following code

code of copy_from_guest:
const typeof(*(ptr)) *_s = (hnd).p;           ............<= this location
typeof(*(ptr)) *_d = (ptr);
raw_copy_from_guest(_d, _s+(off), sizeof(*_d)*(nr));

i not getting the the reference of this .p element in hnd (which is
basically a struct passed from dom0).

any clue? or i am missing something?
thanks for any help.

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[Xen-devel] Large struct reference in Hypercall