From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lakshitha Harshan <harshan.dll@gmail.com>
Subject: Memory Sharing
Date: Tue, 26 Apr 2011 15:22:14 +0530
Message-ID: <BANLkTin-PEm+doKHLAMfOKA19UDP4KR_RQ@mail.gmail.com>
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Hi,

I'm trying to create a code which invokes xc_memshr_nominate_gfn() and
xc_memshr_share().

In my testing code I use,

uint64_t handle; int y;
y = xc_memshr_nominate_gfn(xc_handle,dom,1500,&handle);

It returns -1 even if I use another gfn number instead of 1500. So my
question is why does i returns -1 every time. My guest VMs are HVM (64-bit),
PAE & HAP enabled. I'm using Xen-4.0.2-rc3.

Is it  possible to use these memory sharing functions in this manner
 without any support from blktap2?

If someone could provide me some sample code on how to invoke this functions
it would be a great help to me.

Thanks,
Harshan

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Hi,<div><br></div><div>I&#39;m trying to create a code which invokes xc_mem=
shr_nominate_gfn() and xc_memshr_share().</div><div><br></div><div>In my te=
sting code I use,</div><div><br></div><div><div><span class=3D"Apple-tab-sp=
an" style=3D"white-space:pre">	</span>uint64_t handle; int y; =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0<span class=3D"Apple-tab-span" style=3D"white-space:pre"=
>	</span> =A0 =A0</div>
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>y =3D=
 xc_memshr_nominate_gfn(xc_handle,dom,1500,&amp;handle); =A0</div></div><di=
v><br></div><div>It returns -1 even if I use another gfn number instead of =
1500. So my question is why does i returns -1=A0every time. My guest VMs ar=
e HVM (64-bit), PAE &amp; HAP enabled. I&#39;m using Xen-4.0.2-rc3.</div>
<div><br></div><div>Is it =A0possible to use these memory sharing functions=
 in this manner =A0without any support from blktap2?</div><div><br></div><d=
iv>If someone could provide me some sample code on how to invoke this funct=
ions it would be a great help to me.</div>
<div><br></div><div>Thanks,</div><div>Harshan</div><div><br></div>

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