[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] xen: restore GNTTABOP_dump_table
On 19/11/12 15:29, Ian Campbell wrote: > 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. By guest kernel I meant Dom0 kernel, sorry for the confusion. I've always used the check below to prevent non privileged kernels from getting this information: + if ( !IS_PRIV(current->domain) ) + return -EPERM; _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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