Re: [Xen-devel] Root filesystem access from Xen Hypervisor

[Tej <bewith.tej@xxxxxxxxx>]

On 11/14/08, George Dunlap <George.Dunlap@xxxxxxxxxxxxx> wrote:
> If you want to export data out of the hypervisor, the easiest thing to
> do is set up a shared memory mechanism.  Look at xen/common/trace.c
> and tools/xentrace/xentrace.c for one simple xen-to-userspace example.
>
> Hmm... if you want to reuse as much of the interface as possible,
> you'll probably need to make a Linux kernel module that implements
> /proc/gcov-xen.  The hypervisor can write usage data to the shared
> page(s), and the kernel module can read it, interpret it, and make the
> /proc files based on it.

i am also thinking on same line.
>
> For a sample of how to use xen-to-kernel shared memory, you can look
> at xenoprofile; but be warned that it's suffering some bitrot.
thanks for nice pointers
>
> Let me know how you fare -- it seems like an interesting project.
sure

>
>  -George

thanks
-tej
>
> On Fri, Nov 14, 2008 at 12:15 PM, Tej <bewith.tej@xxxxxxxxx> wrote:
>> On 11/14/08, George Dunlap <dunlapg@xxxxxxxxx> wrote:
>>> /proc is owned by the Linux Kernel; Xen has no filesystem code in it.
>>>
>>> What is it you're trying to do?
>>
>> i am trying to port the gcov for XEN HYpervisor. I could able to
>> create profiling info but i could not able to populate filesystem for
>> profiling purpose.
>>
>>
>>>
>>>  -George
>>>
>>> On Fri, Nov 14, 2008 at 11:45 AM, Tej <bewith.tej@xxxxxxxxx> wrote:
>>>> Can we Access the root filesystem from Xen Hypervisor Code.
>>>> e.g creating dir at /proc
>>>>
>>>>
>>>> Any pointers will be useful.
>>>>
>>>>
>>>> thanks
>>>> -tej
>>>>
>>>> _______________________________________________
>>>> Xen-devel mailing list
>>>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>>>> http://lists.xensource.com/xen-devel
>>>>
>>>
>>
>

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