From mboxrd@z Thu Jan  1 00:00:00 1970
From: sepanta s <sapanta992@gmail.com>
Subject: MEM_SHARING_DEBUG
Date: Sun, 12 Jun 2016 14:37:29 +0430
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Hi,

how to does MEM_SHARING_DEBUG works in xen ?
This function is located at and its internal structure is
xen/arch/x86/mm/mem_sharing.c
<https://github.com/mirage/xen/blob/a6f2cdb633bf519244a16674031b8034b581ba7f/xen/arch/x86/mm/mem_sharing.c>
debugtrace_printk("*mem_sharing_debug*: %s(): " _f, __func__, ##_a)
, so where the logs are being saved?

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<div dir=3D"ltr">Hi,<br><br>how to does MEM_SHARING_DEBUG works in xen ?<br=
>This function is located at and its internal structure is <a href=3D"https=
://github.com/mirage/xen/blob/a6f2cdb633bf519244a16674031b8034b581ba7f/xen/=
arch/x86/mm/mem_sharing.c" title=3D"xen/arch/x86/mm/mem_sharing.c" target=
=3D"_blank">xen/arch/x86/mm/mem_sharing.c</a><br><span>debugtrace_printk</s=
pan>(<span><span>&quot;</span><em>mem_sharing_debug</em>: <span>%s</span>()=
: <span>&quot;</span></span> _f, __func__, ##_a)<br>, so where the logs are=
 being saved? </div>

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--===============3107642585828572023==--

From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wei Liu <wei.liu2@citrix.com>
Subject: Re: MEM_SHARING_DEBUG
Date: Mon, 13 Jun 2016 09:29:37 +0100
Message-ID: <20160613082937.GB25425@citrix.com>
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From mboxrd@z Thu Jan  1 00:00:00 1970
From: sepanta s <sapanta992@gmail.com>
Subject: Re: MEM_SHARING_DEBUG
Date: Tue, 14 Jun 2016 10:51:33 +0430
Message-ID: <CABaiLQ8irSarVfV=YQqRtAONZwZsYSqdkMpsK6uyc8k3WdUmvw@mail.gmail.com>
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 <20160613082937.GB25425@citrix.com>
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On Mon, Jun 13, 2016 at 12:59 PM, Wei Liu <wei.liu2@citrix.com> wrote:

> On Sun, Jun 12, 2016 at 02:37:29PM +0430, sepanta s wrote:
> > Hi,
> >
> > how to does MEM_SHARING_DEBUG works in xen ?
> > This function is located at and its internal structure is
> > xen/arch/x86/mm/mem_sharing.c
> > <
> https://github.com/mirage/xen/blob/a6f2cdb633bf519244a16674031b8034b581ba7f/xen/arch/x86/mm/mem_sharing.c
> >
> > debugtrace_printk("*mem_sharing_debug*: %s(): " _f, __func__, ##_a)
> > , so where the logs are being saved?
>
> From reading the code it can be configured to go to the hypervisor
> console. You then can use xl dmesg to view it.
>
> Should I change the mem_debug_share to printk you mean?
dmesg buffer is limited and I miss some debugging info.


> Note that you need to have a debug hypervisor to have debugtrace
> support. Then you can use xl debug-keys T to toggle whether the output
> goes to console directly or goes to internal buffer.
>
>  I have enabled debugging in xen as I changed debug:= y in Config.mk.
But after compilation and reboot, when I select booting from xen hypervisor
in the grub menu, my ubuntu goes beyond the initialzing ram and then it
reboots.
Am I missing something?

Wei.
>
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
>
>

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<div dir=3D"ltr"><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">=
On Mon, Jun 13, 2016 at 12:59 PM, Wei Liu <span dir=3D"ltr">&lt;<a href=3D"=
mailto:wei.liu2@citrix.com" target=3D"_blank">wei.liu2@citrix.com</a>&gt;</=
span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8e=
x;border-left:1px #ccc solid;padding-left:1ex"><span>On Sun, Jun 12, 2016 a=
t 02:37:29PM +0430, sepanta s wrote:<br>
&gt; Hi,<br>
&gt;<br>
&gt; how to does MEM_SHARING_DEBUG works in xen ?<br>
&gt; This function is located at and its internal structure is<br>
&gt; xen/arch/x86/mm/mem_sharing.c<br>
</span>&gt; &lt;<a href=3D"https://github.com/mirage/xen/blob/a6f2cdb633bf5=
19244a16674031b8034b581ba7f/xen/arch/x86/mm/mem_sharing.c" rel=3D"noreferre=
r" target=3D"_blank">https://github.com/mirage/xen/blob/a6f2cdb633bf519244a=
16674031b8034b581ba7f/xen/arch/x86/mm/mem_sharing.c</a>&gt;<br>
&gt; debugtrace_printk(&quot;*mem_sharing_debug*: %s(): &quot; _f, __func__=
, ##_a)<br>
<span>&gt; , so where the logs are being saved?<br>
<br>
</span>From reading the code it can be configured to go to the hypervisor<b=
r>
console. You then can use xl dmesg to view it.<br>
<br></blockquote><div>Should I change the mem_debug_share to printk you mea=
n?<br></div><div>dmesg buffer is limited and I miss some debugging info.<br=
>=C2=A0<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex">
Note that you need to have a debug hypervisor to have debugtrace<br>
support. Then you can use xl debug-keys T to toggle whether the output<br>
goes to console directly or goes to internal buffer.<br>
<br></blockquote><div>=C2=A0I have enabled debugging in xen as I changed de=
bug:=3D y in Config.mk.<br></div><div>But after compilation and reboot, whe=
n I select booting from xen hypervisor in the grub menu, my ubuntu goes bey=
ond the initialzing ram and then it reboots.<br></div><div>Am I missing som=
ething?<br></div><div><br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Wei.<br>
<br>
&gt; _______________________________________________<br>
&gt; Xen-devel mailing list<br>
&gt; <a href=3D"mailto:Xen-devel@lists.xen.org" target=3D"_blank">Xen-devel=
@lists.xen.org</a><br>
&gt; <a href=3D"http://lists.xen.org/xen-devel" rel=3D"noreferrer" target=
=3D"_blank">http://lists.xen.org/xen-devel</a><br>
<br>
</blockquote></div><br></div></div>

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From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wei Liu <wei.liu2@citrix.com>
Subject: Re: MEM_SHARING_DEBUG
Date: Tue, 14 Jun 2016 09:34:09 +0100
Message-ID: <20160614083409.GA26606@citrix.com>
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From mboxrd@z Thu Jan  1 00:00:00 1970
From: sepanta s <sapanta992@gmail.com>
Subject: Re: MEM_SHARING_DEBUG
Date: Tue, 14 Jun 2016 13:46:45 +0430
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On Tue, Jun 14, 2016 at 1:04 PM, Wei Liu <wei.liu2@citrix.com> wrote:

> On Tue, Jun 14, 2016 at 10:51:33AM +0430, sepanta s wrote:
> > On Mon, Jun 13, 2016 at 12:59 PM, Wei Liu <wei.liu2@citrix.com> wrote:
> >
> > > On Sun, Jun 12, 2016 at 02:37:29PM +0430, sepanta s wrote:
> > > > Hi,
> > > >
> > > > how to does MEM_SHARING_DEBUG works in xen ?
> > > > This function is located at and its internal structure is
> > > > xen/arch/x86/mm/mem_sharing.c
> > > > <
> > >
> https://github.com/mirage/xen/blob/a6f2cdb633bf519244a16674031b8034b581ba7f/xen/arch/x86/mm/mem_sharing.c
> > > >
> > > > debugtrace_printk("*mem_sharing_debug*: %s(): " _f, __func__, ##_a)
> > > > , so where the logs are being saved?
> > >
> > > From reading the code it can be configured to go to the hypervisor
> > > console. You then can use xl dmesg to view it.
> > >
> > > Should I change the mem_debug_share to printk you mean?
>
> No. I think the output can go to console if you configure it properly.
>
> how can I configure it ?


> You can change that to printk if you want to, but I don't think that's
> absolutely necessary.
>

> dmesg buffer is limited and I miss some debugging info.
> >
> >
> > > Note that you need to have a debug hypervisor to have debugtrace
> > > support. Then you can use xl debug-keys T to toggle whether the output
> > > goes to console directly or goes to internal buffer.
> > >
> > >  I have enabled debugging in xen as I changed debug:= y in Config.mk.
> > But after compilation and reboot, when I select booting from xen
> hypervisor
> > in the grub menu, my ubuntu goes beyond the initialzing ram and then it
> > reboots.
> > Am I missing something?
> >
>
> I don't think it is related to MEM_SHARING_DEBUG.
>
> no it is not related to MEM_SHARING_DEBUG,
I think it is because of compiling xen in debug mode.

> Wei.
>
> > Wei.
> > >
> > > > _______________________________________________
> > > > Xen-devel mailing list
> > > > Xen-devel@lists.xen.org
> > > > http://lists.xen.org/xen-devel
> > >
> > >
>
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
>
>

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><div class=3D"gmail_quo=
te">On Tue, Jun 14, 2016 at 1:04 PM, Wei Liu <span dir=3D"ltr">&lt;<a href=
=3D"mailto:wei.liu2@citrix.com" target=3D"_blank">wei.liu2@citrix.com</a>&g=
t;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0=
px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span=
 class=3D"">On Tue, Jun 14, 2016 at 10:51:33AM +0430, sepanta s wrote:<br>
&gt; On Mon, Jun 13, 2016 at 12:59 PM, Wei Liu &lt;<a href=3D"mailto:wei.li=
u2@citrix.com">wei.liu2@citrix.com</a>&gt; wrote:<br>
&gt;<br>
&gt; &gt; On Sun, Jun 12, 2016 at 02:37:29PM +0430, sepanta s wrote:<br>
&gt; &gt; &gt; Hi,<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; how to does MEM_SHARING_DEBUG works in xen ?<br>
&gt; &gt; &gt; This function is located at and its internal structure is<br=
>
&gt; &gt; &gt; xen/arch/x86/mm/mem_sharing.c<br>
&gt; &gt; &gt; &lt;<br>
&gt; &gt; <a href=3D"https://github.com/mirage/xen/blob/a6f2cdb633bf519244a=
16674031b8034b581ba7f/xen/arch/x86/mm/mem_sharing.c" rel=3D"noreferrer" tar=
get=3D"_blank">https://github.com/mirage/xen/blob/a6f2cdb633bf519244a166740=
31b8034b581ba7f/xen/arch/x86/mm/mem_sharing.c</a><br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; debugtrace_printk(&quot;*mem_sharing_debug*: %s(): &quot; _f=
, __func__, ##_a)<br>
&gt; &gt; &gt; , so where the logs are being saved?<br>
&gt; &gt;<br>
&gt; &gt; From reading the code it can be configured to go to the hyperviso=
r<br>
&gt; &gt; console. You then can use xl dmesg to view it.<br>
&gt; &gt;<br>
&gt; &gt; Should I change the mem_debug_share to printk you mean?<br>
<br>
</span>No. I think the output can go to console if you configure it properl=
y.<br>
<br></blockquote><div>how can I configure it ?<br>=C2=A0<br></div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px =
solid rgb(204,204,204);padding-left:1ex">
You can change that to printk if you want to, but I don&#39;t think that&#3=
9;s<br>
absolutely necessary.<br>
<span class=3D""></span>=C2=A0</blockquote><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex"><span class=3D"">
&gt; dmesg buffer is limited and I miss some debugging info.<br>
&gt;<br>
&gt;<br>
&gt; &gt; Note that you need to have a debug hypervisor to have debugtrace<=
br>
&gt; &gt; support. Then you can use xl debug-keys T to toggle whether the o=
utput<br>
&gt; &gt; goes to console directly or goes to internal buffer.<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 I have enabled debugging in xen as I changed debug:=3D y in=
 Config.mk.<br>
&gt; But after compilation and reboot, when I select booting from xen hyper=
visor<br>
&gt; in the grub menu, my ubuntu goes beyond the initialzing ram and then i=
t<br>
&gt; reboots.<br>
&gt; Am I missing something?<br>
&gt;<br>
<br>
</span>I don&#39;t think it is related to MEM_SHARING_DEBUG.<br>
<span class=3D""><font color=3D"#888888"><br></font></span></blockquote><di=
v>no it is not related to MEM_SHARING_DEBUG, <br></div><div>I think it is b=
ecause of compiling xen in debug mode.=C2=A0 </div><blockquote class=3D"gma=
il_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,2=
04,204);padding-left:1ex"><span class=3D""><font color=3D"#888888">
Wei.<br>
</font></span><div class=3D""><div class=3D"h5"><br>
&gt; Wei.<br>
&gt; &gt;<br>
&gt; &gt; &gt; _______________________________________________<br>
&gt; &gt; &gt; Xen-devel mailing list<br>
&gt; &gt; &gt; <a href=3D"mailto:Xen-devel@lists.xen.org">Xen-devel@lists.x=
en.org</a><br>
&gt; &gt; &gt; <a href=3D"http://lists.xen.org/xen-devel" rel=3D"noreferrer=
" target=3D"_blank">http://lists.xen.org/xen-devel</a><br>
&gt; &gt;<br>
&gt; &gt;<br>
<br>
&gt; _______________________________________________<br>
&gt; Xen-devel mailing list<br>
&gt; <a href=3D"mailto:Xen-devel@lists.xen.org">Xen-devel@lists.xen.org</a>=
<br>
&gt; <a href=3D"http://lists.xen.org/xen-devel" rel=3D"noreferrer" target=
=3D"_blank">http://lists.xen.org/xen-devel</a><br>
<br>
</div></div></blockquote></div><br></div></div>

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From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wei Liu <wei.liu2@citrix.com>
Subject: Re: MEM_SHARING_DEBUG
Date: Tue, 14 Jun 2016 10:34:30 +0100
Message-ID: <20160614093430.GC28116@citrix.com>
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