Evening Mukesh:
Re:
> Correct. Just git clone xen tree to match your version, then edit the file to add printk, then build xen.
> copy xen to target machine over to /boot. Then edit grub kernel line to boot new xen.
Kernel log showing I'm running Xen version 4.4.0 (preserve-AD) on Ubuntu 14.04.
Git shows a stable-4.4 and a staging-4.4 release tag. The stable-4.4 is the last on the branch,
and follows a 4.4.2-pre. Release 4.4.1 is between staging-4.4 and stable-4.4;
so it's not clear looking at the git history and the kernel log which are matching
xen version is. I suspect it's not that important.
My guess is to use the last commit; looks good (checking control blocks when using FIFO events);
that git tag stable-4.4 is the best match for Ubuntu 14.04's reported version 4.4.0 (preserve-AD).
In the mean time I'll cherry pick your suggested printk patch to stable-4.4.
-piet
--
Pete/Piet Delaney
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-----Original Message-----
From: Mukesh Rathor [mailto:mukesh.rathor@xxxxxxxxxx]
Sent: Tuesday, September 16, 2014 7:16 PM
To: Pete Delaney
Cc: xen-devel@xxxxxxxxxxxxx; piet.delaney@xxxxxxxxx; Elaine Huang; Tedi Tedijanto
Subject: Re: gdbsx - xg_attach:Unable to pause domain:1; failed to attach to domain:1 errno:13
On Tue, 16 Sep 2014 22:58:37 +0000
Pete Delaney <pdelaney@xxxxxxxxxxxxxxx> wrote:
> Hi Mukesh:
>
>
>
> Thanks for your help on enabling gdbsx...
>
>
>
> > Hmm... that all seems ok then. Can you check your permissions on :
>
>
>
> > /proc/xen/privcmd
>
>
>
> root@piet-openxen-blade:~# ls -l /proc/xen/privcmd
>
> -rw------- 1 root root 0 Aug 11 13:37 /proc/xen/privcmd
>
>
>
> Privcmd seems to be a hypervisor call available from userland
>
> For Xen developers:
>
>
>
>
>
http://sanifool.com/2013/02/08/invoking-an-hypercall-from-userland-via
> -privcmd/
>
>
>
>
>
> > Other possibilities:
>
> > - do you have xsm enabled?
>
>
>
> Don't think so. I've heard this security stuff can get in the way.
>
> Doing a 'xl list -Z' doesn't show any security
> labels. [Wish I had
> Synergy Installed]
>
>
>
>
>
> >- can you put a printk in xen file common/domctl.c:
>
>
>
> Sure but first I likely need to start using the openxen code that I
> compiled from src.
>
> I'm currently using openxen installed via a Ubuntu 14.04 package.
>
>
>
> Mind explaining the best way to proceed on switching to the openxen
>
> That I compiled from source? I thought some of it might be installed
> at /usr/local/
>
> And perhaps just changing a search path or two will be sufficient.
>
>
>
> I suspect I'll need to put a new xen kernel on /boot and update the
> grub config.
Correct. Just git clone xen tree to match your version, then edit the file to add printk, then build xen. copy xen to target machine over to /boot. Then edit grub kernel line to boot new xen.
Mukesh
