Re: [Xen-devel] [PATCH] xen: restore GNTTABOP_dump_table

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2012-11-16 at 15:02 +0000, Roger Pau Monnà wrote:
> On 16/11/12 15:52, David Vrabel wrote:
> > On 19/10/12 16:47, Roger Pau Monne wrote:
> >> This operation was dropped long time ago, but I found it quite helpful
> >> for debugging purposes. This re-implementation uses the code already
> >> present in gnttab_usage_print and adds the maptrack-table dump.
> > 
> > Why is the operation useful?  Isn't the debug key sufficient?
> 
> The debug key doesn't print the maptrack, and also I found it quite
> useful to be able to call this from the guest kernel itself at certain
> specific points (like before and after cleaning the list of persistent
> grants), which is not possible when using the debug key.

I presume this involved temporarily patching Xen to allow this since you
wouldn't want this function to be callable by guests in general.

Ian.


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